77643-70-0

Basic information

• Product Name: iodure de <(dimethyl-3,5 thiopyrannylidene-2) methyl>-3 phenyl-5 dithiole-1,2 ylium
• CAS NO: 77643-70-0
• Molecular Weight: 442.409
• Mol File: 77643-70-0.mol

Chemical Properties

• CAS DataBase Reference: iodure de <(dimethyl-3,5 thiopyrannylidene-2) methyl>-3 phenyl-5 dithiole-1,2 ylium(CAS DataBase Reference)
• NIST Chemistry Reference: iodure de <(dimethyl-3,5 thiopyrannylidene-2) methyl>-3 phenyl-5 dithiole-1,2 ylium(77643-70-0)
• EPA Substance Registry System: iodure de <(dimethyl-3,5 thiopyrannylidene-2) methyl>-3 phenyl-5 dithiole-1,2 ylium(77643-70-0)

Safety Data

• Hazardous Substances Data: 77643-70-0(Hazardous Substances Data)

Upstream product

• 37344-00-6 iodure de methyl-3 phenyl-5 dithiole-1,2 ylium 
• 18470-44-5 iodure de dimethyl-3,5 methylthio-2 thiopyrylium 
• 93-91-4 1-phenylbutan-1,3-dione 

Relevant articles and documents

COMPOSES SULFURES HETEROCYCLIQUES. XCII (1). SYNTHESE ET REARRANGEMENT D'IODURES DE -3 DITHIOLE-1,2 YLIUM

In the presence of pyridine, 3-(1,2-dithiol-3-ylidenemethyl)-1,2-dithiolium cations 1 are deprotonated, with rearrangement, sometimes in two ways, whereas 2-(thiopyrane-2-ylidenemethyl)-thiopyrylium cations 3 are stable. Cations 7 possess both a dithiole and a thiopyran ring and have been synthetized by condensation of 2-methylthio-thiopyrilium iodides with 3-methyl-1,2-dithiolium iodides in 1-butanol.In acetic acid, the intermediates 6 can be isolated: they lose methanethiol, yielding 7, by heating in 1-butanol. By analogy with cations 1, deprotonation (with rearrangement) of 7 could be expected to give two different structures 9 and/or 11.When treated with triethylamine, the salts 7 lead to unstable neutral compounds.If the reaction is followed by oxidation with benzonitrile oxide, compounds 11 are obtained.Their formation arises from a rearrangement analogous to that observed only in some cases with the dithiolic compounds.Starting from 7, the main rearrangement observed in the dithiole series would give the 2-(thiopyran-2-ylidene)-thiophen-3-one 9 which has been synthetized by condensation of 2-methylthio-4,6-diphenylthiopyrylium iodide with 5-phenylthiophen-3-one.The structure of α-(1,4 dithiainden-2-ylidene)-ketones 11 is consistent with UV,IR and NMR spectra.Progressive complexation with tris (dipivaloylmethanato) europium permits the attribution of all the 1H NMR signals of the molecule.