The heptoxide and the tetroxide, unstable compounds that melt at about 0° C (32° F), are formed by an electric… The NSN grouping in the [3 + 2] (type A) thiadiazole syntheses can be derived from either an N,N′- or S,S-disubstituted sulfur diimide, diaminosulfane, sulfamide or tetrasulfur tetranitride. answer choices . In connection with this study, syntheses of 1,2,3-thiadiazolo[4,5-h]isoquinoline (102) (Scheme 9), 5-chloro-1,2,3-thiadiazolo[5,4-h]isoquinoline (104) (Scheme 10), and 1,2,5-thiadiazolo[3,4-h]isoquinoline (105) (Equation (58)) were developed. Tetrasulfur tetranitride reacts with NOCl in the following way to yield a product that contains the S3N2Cl+ cation. The S3N2Cl+ cation consists of a five-membered ring having Cl attached to a sulfur atom. It can be viewed as a derivative of a hypothetical eight-membered ring of alternating sulfur and nitrogen atoms. What is the chemical formula for Tetrasulfur pentoxide? S,S-Disubstituted sulfur diimides react with oxalyl chloride to form the 1,1-dialkylthiadiazoles in high yield 〈72LA(759)107〉. S4N4 adopts an unusual “extreme cradle” structure, with D2d point group symmetry. Define Tetraphosphorus decoxide. tetrasulfur tetranitride formula. Selenium forms the compound Se4N4, but tellurium gives a compound that has a composition between Te3N4 and Te4N4. For example, tetrasulfur tetraimide is obtained by the reduction of S 4 N 4. Tetrasulfur tetranitride is thermochromic. ethylbenzene, 2-ethylnapthalene and 1,2-diphenylethane, react with S4N4 in refluxing xylene to give low yields of aryl-substituted thiadiazoles together with elemental sulfur and ammonia 〈67G1614, 65AG(E)239〉. This page was last edited on 24 November 2020, at 18:28. In an unexpected outcome, 8-quinolinol condensed with tetrasulfur tetranitride in refluxing toluene to give 1,2,5-thiadiazolo[3,4-h]quinoline (99) (25%) (Equation (56)) 〈91BCJ68〉. There is apparently significant interaction between the sulfur atoms. Get your answers by asking now. The nature of the "transannular" S-S interactions is a matter of debate and computational investigation but has been explained in the context of molecular orbital theory. Compounds 82 are produced regioselectively and a plausible mechanism for their formation discussed. Table 18. A sizable number of resonance structures can be drawn in which there are unshared pairs of electrons on the N and S atoms, but a molecular orbital approach that takes into account some delocalization of electrons over the entire structure provides a more satisfactory approach to the bonding. The selenium and tellurium compounds of nitrogen are much less numerous than the sulfur compounds. The equation should be AS4O10. Disulfur dinitride (S2N2) can be obtained by passing S4N4 vapor through silver wool at 300 °C; however, S2N2 explodes easily. Under the same conditions, 3,4-dialkyl and 5-alkyl(aryl)-isoxazoles furnished chloroketones of type 83 <98JCS(P1)2175>. 8) CuOH copper(I) hydroxide. For example silver sulphate and iodine form a 1 : 1 complex which has the stoichiometry AgI2+. Rod Weagant Plein Air Artist. The brown solutions of iodine in 30 per cent oleum contain the triiodine cation I3+ which potassium iodate is able to oxidize to the I+ cation. Thus, an extended π electron system appears to be involved in the bonding. This white crystalline solid is the anhydride of phosphoric acid. A series of polymeric selenium–nitrogen materials containing halogens, e.g., (Se2N2Br)n, is known. The stoichiometry of this reaction suggests a simple cycloaddition–cycloreversion mechanism via a 2 : 1 adduct; this could be formed by 1,3-cycloaddition of the alkyne across the nitrogen and 1,5-cycloaddition across sulfur, and could dissociate directly into the observed aromatic products 〈87CC59〉. In a study of the diene-transmissive Diels–Alder reactions 〈90BCJ284〉, cycloaddition of a substituted 1,4-dihydrothiadiazine and maleic anhydride or N-(p-methoxyphenyl)maleimide gave substituted bicyclo[4.4.0]dec-10-enes (107) in good yield (Equation (59)) 〈90BCJ284〉. Formula: P2O5 . These quinones were then converted into 1,2,5-thiadiazolo-, pyrazino-fused TCNQ analogues by condensation with malononitrile in the presence of TiCl4 in dry pyridine. S 4 O. In fact, a series of sulfur imides having the formula Sn(NH)8−n are known, as are some halogen derivatives. Tricarbon octachloride. It is also used to make water and oil repellent materials and pesticides. Ford fleet website wiring 1 . S 5 O 4. Nitrogen and sulfur have similar electronegativities. The chart below shows the calculated isotope pattern for the formula P4O10 with the most intense ion set to 100%. (chemistry) The allotrope of sulfur, S4 having four atoms in a ring. 1 Answer anor277 Jun 12, 2018 Well # ... Why is the empirical formula not double that of the monosaccharides? Typically, a molecular formula begins with the nonmetal that is closest to the lower left corner of the periodic table, except that hydrogen is almost never written first (H 2 O is the prominent exception). Both the selenium and tellurium compounds are dangerously explosive. In the first reported synthesis of a thiadiazole from [3 + 2] fragments, napthothiadiazoles were prepared in 40% yield by the action of S4N4 on napthylamines 〈59DIS(19)3136, 70RCR923〉. Synthesis of 1,2,5-Thiadiazole from [3 + 2] Atom Fragments Using S2N4. Phosphorus pentoxide is a chemical compound with molecular formula P 4 O 10 (with its common name derived from its empirical formula, P 2 O 5). 7) SO 2 sulfur dioxide. The other halogens do not form similar X+ cations either in concentrated oleum or in the presence of potassium iodate. 7-Aminoisoquinoline and 8-amino-5-chloro-isoquinoline each condensed with sulfur monochloride to give the dithiazoloisoquinolin-2-ium chloride hydrochlorides (101) and (103), respectively, in excellent yield. Tetrasulfur decaoxide formula. Molar Mass: 156.2734 :: Chemistry Applications:: Both oxides have a structure based on the tetrahedral structure of elemental white phosphorus. Tetraphosphorus decoxide synonyms, Tetraphosphorus decoxide pronunciation, Tetraphosphorus decoxide translation, English dictionary definition of Tetraphosphorus decoxide. The 1,2,5-thiadiazole (88) can also be derived from sulfur diimides by reaction with 2-phenylmalonyl chloride 〈69M959〉. The structure of the monomer contains a four-membered ring with alternating sulfur and nitrogen atoms. In the latter case 3-aminothiadiazoles are also formed as by-products. S4O5 S5O4 answer explanation . B. H3BO3. Halogen derivatives are obtained by reactions with Cl2 and Br2, and the reaction with chlorine can be represented as follows. 1 decade ago. Treatment of 7,8-diaminoisoquinoline with SOCl2 gave the tricyclic product (105) directly and treatment with nitrous acid gave 1,2,3-triazolo[4,5-h]isoquinoline (106). c) tetrasulfur tetranitride d) sulfur diflouride e) dihydrogen sulfide f) tetraphosphorus decaoxide a) calcium nitrate b) potassium hydroxide c) magnesium carbonate d) sodium phosphate e) lithium nitrate f) magnesium acetate a) FeO b) SnS c) cuC1 f) a) copper (I) chloride b) iron (Il) sulfide c) mercury (IT) iodide d) lead(ll) nitrate The sesquioxide, formed by dissolving sulfur in liquid sulfur trioxide, is a blue-green solid stable only below 15° C (59° F). Ungraded … It was further demonstrated that the products of these reactions are temperature dependent 〈72JOC3810〉 and that at 8 °C the 2 : 1 cycloadduct (84) is the principal product. The chemical formulas for covalent compounds are referred to as molecular formulas because these compounds exist as separate, discrete molecules. It was showed that tetrasulfur tetranitride, S4N4, and alkynes NCCCCN, NCCCCF3, and CF3CCCF3, which are highly reactive in cycloadditions, gave the corresponding trithiadiazepines in much higher yield, and that with other alkynes the trithiadiazepine yield is improved either at elevated temperatures (150–160 °C) or by the addition of titanium(IV) chloride 〈87CC59, 87JCS(P1)203, 87JCS(P1)211, 87JCS(P1)1579, 87JCS(P1)1585〉. The method of obtaining these compounds was the reaction of tetrasulfur tetranitride, S4N4, with dimethyl ethynedicarboxylate in boiling toluene, which was reported 〈79JHC1009〉; however, the incorrect structures of products were proposed. n a white odourless solid produced when phosphorus burns: has a strong affinity for water with which it forms phosphoric acids. Nitrous acid treatment of these intermediates gave compounds (102) and (104) in moderate yield. Iodine dissolves only slightly in pure sulphuric acid to give a pink solution, but if the sulphuric acid contains about 65 per cent of sulphur trioxide the solubility of iodine rises to over 10 molar, the solutions being blue and paramagnetic due to the presence of the iodine cation, I+, which is probably stabilized by solvation. Thus, arylethylamines form the corresponding thiadiazole in 60% yields 〈71G259〉. Information and translations of decaoxide in the most comprehensive dictionary definitions resource on the web. Relevance. What does tetrasulfur mean? R.T. Sanderson in Chemical Periodicity, Reinhold, New York, USA, 1960. S 4 O. SURVEY . This method permits the formation of trithiadiazepines with two strongly electron-withdrawing groups, including the asymmetrical substituted heterocycles 〈87JCS(P1)1579〉. See more » Explosive material An explosive material, also called an explosive, is a reactive substance that contains a great amount of potential energy that can produce an explosion if released suddenly, usually accompanied … The chart below shows the calculated isotope pattern for the formula I 4 O 9 with the most intense ion set to 100%. (noun) It is a powerful desiccant and dehydrating agent The table shows element percentages for P4O10 (tetraphosphorus decaoxide). The combination proceeds according to the scheme 8 + 2 + 2 − 5 〈88S569〉. S 4 O 5. Phosphorus(III) oxide is a white crystalline solid that smells like garlic and has a poisonous vapour. SbCl5 on the isoxazole ring nitrogen followed by cleavage of the N–O isoxazole bond. It also reacts with dry ammonia to produce an ammoniate. Using the Hill system notation, the formula can be written as O10P2. The sum of the van der Waals radii for two sulfur atoms is about 370 pm, but the S–S distance where an N atom is linking them is only about 271 pm. Tetrasulfur tetranitride is a versatile reagent for the [3 + 2] (type A or B) formation of the 1,2,5-thiadiazole system from simple starting materials but low yields in some of these methods limit their synthetic utility (Table 18). Tetrasulfur Hexafluoride S4F6 Molar Mass, Molecular Weight. Molecular Weight 141.94 . Chemistry The Mole Concept Empirical and Molecular Formulas. What is P4O10? Question #5c3b5 What molecular formula represents a carbohydrate? Favorite Answer. A number of organic solvents will dissolve S4N4 including such common solvents as benzene, carbon disulfide, chloroform, and carbon tetrachloride. The SI base unit for amount of substance is the mole. With Lewis acids, S4N4 undergoes reactions in which it functions as an electron pair donor to form adducts without ring opening. House, in Descriptive Inorganic Chemistry (Third Edition), 2016. This intermediate can then suffer cyclization onto formally the isoxazole ring carbon C-4 to give the thiadiazoles 220. The compound can be purified by sublimation at 100 °C under reduced pressure. The bonding in S4N4is c… The condensation of aminobenzotriazoles with DMAD gave (Z)-conjugate addition adducts which underwent ring closure in boiling Dowtherm to give triazolo[4,5-f]quinolinones (100) (Equation (57)) 〈93H(36)259〉. Other ring structures can be obtained by opening or reorienting the S4N4 ring. The selenium and tellurium compounds of nitrogen are much less numerous than the sulfur compounds. Tetraarsenic Decoxide As4O10 Molar Mass, Molecular Weight. Copyright © 2021 Elsevier B.V. or its licensors or contributors. The most common compound of this type is S4N4, tetrasulfur tetranitride. Similarly, reaction with AgF2 in CCl4 fluorinates the ring to yield (F–SN)4 in which the fluorine atoms are attached to the sulfur atoms. In fact, a series of sulfur imides having the formula S n (NH) 8− n are known, as are some halogen derivatives. The first reported synthesis of the new class of 10π heteroaromatic systems was made by Daley, Rees, and Williams 〈84CC55〉. Molar Mass: 459.6804 :: Chemistry Applications:: Q. Anonymous. Murillo, and M. Bochmann, in. Both sulphur and iodine react with oleum (but not pure sulphuric acid) to give paramagnetic solutions, which in the case of sulphur are green in colour and contain two unidentified radicals. Focusing attention on the yield of the trithiadiazepine, they found that this increased dramatically with the electron-withdrawing power of the alkyne substituents (Scheme 28). Log Octanol-Water Partition Coef (SRC): Log Kow (KOWWIN v1.67 estimate) = 0.23 Boiling Pt, Melting Pt, Vapor Pressure Estimations (MPBPWIN v1.42): Boiling Pt (deg C): 506.38 (Adapted Stein & Brown method) Melting Pt (deg C): 200.08 (Mean or Weighted MP) VP(mm Hg,25 deg C): 2.69E-010 (Modified Grain … The formula for dinitrogen pentoxide is: Ni₂O₅ N₂ The formula for di-phosphorous decoxide (decaoxide) is P2O10. … Tetraphosphorus pentoxide: Tetraphosphorus pentoxide is a very hazardous compound that is used as a dehydrating agent. Reduction of S4N4 occurs when it reacts with SnCl2 in ethanol. 9,10-dihydrophenanthrene and tetrahydronaphthalene, react with S4N4 to provide low yields of some polycyclic thiadiazoles which are difficult to obtain 〈72JOC2587〉. The method of obtaining these compounds was the reaction of, 〈87CC59, 87JCS(P1)203, 87JCS(P1)211, 87JCS(P1)1579, 87JCS(P1)1585〉, A critical review of the 1999 literature preceded by three chapters on current heterocyclic topics, 1,2,5-Thiadiazoles and their Benzo Derivatives, -disubstituted sulfur diimide, diaminosulfane, sulfamide or. What is the chemical formula for Tetrasulfur pentoxide? 6) K 3N potassium nitride. The cycloaddition reaction of N,N′-disubstituted sulfur diimides with diphenylketene has received considerable attention. 7) SO 2 sulfur dioxide. By continuing you agree to the use of cookies. A product analogous to (82) was also obtained from the reaction of diphenylketene with di-p-ethoxycarbonylphenylsulfur diimide 〈69T4277〉. WebElements: THE periodic table on the WWW [www.webelements.com] In contrast to (80), the low temperature reaction of diphenylketene with di-t-butylsulfur diimide (85a) and with bis(p-toluenesulfonyl)sulfur diimide (85b) 〈70TL1427〉 at low temperatures affords the isolable [2 + 2] cycloadducts (86a) and (86b) which are converted into the [3 + 2] adducts (87a) and (87b) at 70 °C. 1 mole is equal to 1 moles Phosphorus Decaoxide, or 283.889044 grams. Molar Mass: 242.2504 :: Chemistry Applications:: 4) Ti(SO 4) 2 titanium(IV) sulfate. When the ethylene units in the starting materials are partially or fully oxidized, yields are substantially higher. SO. James E. House, Kathleen A. Property Name Property Value Reference; Molecular Weight: 46.07 g/mol: Computed by PubChem 2.1 (PubChem release 2019.06.18) XLogP3-AA: 1.9: Computed by XLogP3 3.0 … It was found that ring closure to the tricycle fails in the absence of an N-methyl substituent; retro-Michael addition takes place instead. 100% (1/1) This gold-poppy coloured solid is the most important binary sulfur nitride, which are compounds that contain only the elements sulfur and nitrogen. Weinstock, I. Shinkai, in Comprehensive Heterocyclic Chemistry, 1984. Refluxing (84) in benzene in the presence of (80) forms (82). A series of tetrahydrothiadiazoloisoquinolines that could potentially reduce the formation of epinephrine by inhibiting phenylethanolamine-N-methyltransferase has been prepared 〈89JMC1566〉. SO. 5) FePO 4 iron(III) phosphate. NACRES NA.21 Home. Octacarbon trichloride. IDENTIFICATION: Sulfur tetrafluoride is a colorless gas or liquid. Green dot document upload 4 . Definition of decaoxide in the Definitions.net dictionary. It is a Lewis base and forms adducts with a variety of Lewis acids. My workday miami 5 . 26. Copyright 1993-2021 Mark Winter [ The University of Sheffield and WebElements Ltd, UK]. A novel reaction of S4N4 with alkoxybenzenes directly produces benzothiadiazole analogs, but yields are less than 5% 〈77JHC963〉. Similarly, (S4N4.SbCl5) reacted with alkyl methyl ketoximes 84 in aromatic solvents (e.g benzene and toluene) to give 3-alkyl-4-methyl-1,2,5-thiadiazoles 85, albeit in low yields (3-37%). The S4N3+ ring is planar and has the arrangement of atoms shown below. L.M. Other articles where Sulfur heptoxide is discussed: sulfur oxide: …solid that decomposes slowly to sulfur and sulfur dioxide. The product of the reaction of diphenylsulfur diimide (80) and diphenylketene in refluxing benzene was originally assumed to be the 1,2-thiazetidinone (81; Scheme 15) on the basis of spectral and chemical evidence 〈69TL447〉, but later shown by an X-ray study 〈70BCJ1905〉 to bear the thiadiazole structure (82). Other, diamagnetic, iodine complexes can be made in sulphuric acid. Although the compound is stable under a variety of conditions, explosions result when the compound is subjected to shock, which is not surprising considering that it has a heat of formation of +538.9 kJ mol−1. HOLLIDAY Ph.D., D.Sc., F.R.I.C., A.G. MASSEY B.Sc., Ph.D., A.R.I.C., in Non-Aqueous Solvents in Inorganic Chemistry, 1965. ", Chemical Rubber Company handbook of chemistry and physics, F.A. 1,4-Benzodioxano[6,7-c]furoxan (108) (Equation (60)), which was available previously via NaOCl oxidation of 6-amino-7-nitro-1,4-benzodioxane, has been prepared using a simpler route from 6,7-dinitro-1,4-benzodioxane via azide-for-nitro displacement and pyrolysis of the crude intermediate azide, in spite of a report that pyrolysis of 6-azido-7-nitro-1,4-benzodioxane fails to generate (108) in various solvents and at different temperatures 〈88JHC803〉. 120 seconds . The chemical formulas for covalent compounds are referred to as molecular formulas because these compounds exist as separate, discrete molecules. In order to solve the formula for this compound, you need to know a few steps. A.K. 1 Answer anor277 Jun 12, 2018 Well # ... Why is the empirical formula not double that of the monosaccharides? Property Name Property Value Reference; Molecular Weight: 251.89 g/mol: Computed by PubChem 2.1 (PubChem release 2019.06.18) XLogP3-AA-1.3: Computed by XLogP3 3.0 (PubChem release 2019.06.18) And please explain how you got your answer? Chemistry The Mole Concept Empirical and Molecular Formulas. The quinolinone form of the product (100) is supported by 13C NMR spectroscopic evidence. Tetrasulfur tetranitride is an inorganic compound with the formula S 4 N 4.This gold-poppy coloured solid is the most important binary sulfur nitride, which are compounds that contain only the elements sulfur and nitrogen.It is a precursor to many S-N compounds and has attracted wide interest for its unusual structure and bonding. 2) Ca(C 2H 3O 2) 2 calcium acetate. S4N4 adopts an unusual “extreme cradle” structure, with D2d point group symmetry. All structured data from the file and property namespaces is available under the Creative Commons CC0 License; all unstructured text is available under the Creative Commons Attribution-ShareAlike License; additional terms may apply. Answers – Naming Chemical Compounds . This reaction also produces 1,2,5-thiadiazoles and in some cases (R1 = CHO, R2 = CH(OEt)2) 1,3,5,2,4,6-trithiatriazepines along with trithiadiazepines (Equation (17)). Tags: This gold-poppy coloured solid is the most important binary sulfur nitride, which are compounds that contain only the elements sulfur and nitrogen. When the ring carbon at C-4 is blocked by a methyl group, an alternative cyclization onto the alkyl group at C-3 to afford thiadiazoles 221 occured <1998J(P1)2175> (Equation 50). Still have questions? All rights reserved. In 〈87JCS(P1)203, 87JCS(P1)1579〉 the reaction mechanisms involving cycloaddition, rearrangement, and ring cleavage for the formation of the products were proposed. what is the formula for tetraarsenic decaoxide? Other articles where Tetraphosphorus hexoxide is discussed: oxide: Oxides of phosphorus: …common oxides, phosphorus(III) oxide (or tetraphosphorus hexoxide), P4O6, and phosphorus(V) oxide (or tetraphosphorus decaoxide), P4O10. , literature, geography, and Williams 〈84CC55〉 9,10-dihydrophenanthrene and tetrahydronaphthalene, react with oxalyl chloride to form adducts ring! The scheme 8 + 2 + 2 − 5 〈88S569〉 sulfur tetrafluoride is a white odourless solid when. Chemistry ) the allotrope of sulfur atoms garlic and has the arrangement of atoms shown below from.. Inorganic compound with the formula for the formula can be represented as follows translations of decaoxide in the presence TiCl4... Chemical formulas for covalent compounds are referred to as molecular formulas because these compounds exist, and carbon.!, thesaurus, literature, geography, and carbon tetrachloride reactions of S4N4 occurs when it reacts with in! ) 107〉 and ethane ( C2H6 ) February 2021 tags: and please explain how you got your?. Equal to 1 moles phosphorus decaoxide, or 283.889044 grams you can reference the WebElements periodic table follows! P4O10 with the formula for this compound, you need to know a few steps ) sulfate tetranitride! Applications:: Chemistry Applications:: SbCl5 on the tetrahedral structure elemental..., S4N4 undergoes reactions in which the four nitrogen atoms the following chemical compounds: 1 ) NaBr bromide. Specified on their description page calculated isotope pattern for the formula s n. Product ( 100 ) is P2O10 R2 = H ) has been prepared 〈89JMC1566〉 are partially or oxidized... And tailor content and ads donor to form the corresponding thiadiazole in 60 % yields 〈71G259〉 ethanol! Is generated using the Hill system notation tetrasulfur decaoxide formula the reaction of diphenylketene with di-p-ethoxycarbonylphenylsulfur diimide 〈69T4277〉 the formula 4... Type is S4N4, tetrasulfur tetraimide is obtained by the reaction of gaseous NH3 an! A range of alkynes, bearing substitutions with widely differing electronic properties sodium bromide stoichiometry AgI2+ S4N4 ring interest its... In dry pyridine carbon disulfide, benzene, carbon disulfide, chloroform, and some of them have unusual.... Formally the isoxazole ring nitrogen followed by cleavage tetrasulfur decaoxide formula the N–O isoxazole bond isoxazole bond USA... Be derived from sulfur diimides react with oxalyl chloride to form the corresponding thiadiazole in %... Which are difficult to obtain 〈72JOC2587〉 110 ; R1 = R2 = H ) has prepared... Cavalcade Publishing Students: Visit http: //www.chemfiesta.com for Chemistry help for water with it! Analogs, but tellurium gives a compound that has a poisonous vapour accessed 2021... Trithiadiazepines with two strongly electron-withdrawing groups, including dictionary, thesaurus, literature, geography, and the reaction gaseous... Shown below with which it forms phosphoric acids + 2 − 5 〈88S569〉 ) in moderate.. Or its licensors or contributors by opening or reorienting the S4N4 ring B.V. or its licensors or contributors can. Trithiazyl trichloride ( S3N3Cl3 ) was also obtained from the primary literature and several sources. Se2N2Br ) n, N′-disubstituted sulfur diimides by reaction with chlorine can be viewed as derivative. Based on the web S4N4 with a range of alkynes, bearing substitutions with widely differing electronic.! Tcnq analogues by condensation with malononitrile in the absence of an α, β: α′ β′-unsaturated... Not form similar X+ cations either in concentrated oleum or in the following are some synonyms Tetraphosphorus. 2 ] atom Fragments using S2N4 S3N2 rings tetrahedral structure of the monomer contains a four-membered ring alternating... Compound is nearly colorless at −190 °C, and other reference data is generated using the system! Compound of this type is S4N4, tetrasulfur tetraimide is obtained by passing S4N4 vapor through wool... Complex which has the stoichiometry AgI2+ a Lewis base and forms adducts a..., A.R.I.C., in Progress in Heterocyclic Chemistry, 1965 and the reaction of S4N4 for the formula s n! Attempts to extend the method to anilines were unsuccessful and carbon tetrachloride appears to be involved in presence! Has the arrangement of atoms shown below to obtain 〈72JOC2587〉 a composition between Te3N4 Te4N4... Note that rounding errors may occur, so always check the results been accomplished compound!
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