Bonds to Sulphur

Bonds to Sulphur.—The antimony atom in the dithioester (103) is in pseudo-trigonal-bipyramidal co-ordination as a result of the 1,5-interaction often observed in similar systems. In the dithiocarbamates M(S2CNEt2)3, where M = Sb or Bi, the ligands are asymmetrically co-ordinated, as found for the arsenic compound, but here there is increasing intermolecular attraction, so that with bismuth an apparent dimer is formed.  

Jolivet, J. Lemerle, and J. Lefebvre, Bull. Soc. chim. France, 1975, 2415. 

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The extension from cyclopropenones to cyclopropenthiones was made by Dehmlov and coworkers who reported chemical shifts C(l), C(2) 153.4 and C(3) 177.6 ppm for 170 the corresponding shifts for diphenylcyclopropenone are 148.4 and 155.8 ppm. It is seen that the carbon bonded to sulphur absorbs at appreciably lower field than the corresponding carbonyl carbon and indeed this behaviour is characteristic of a thioketone-ketone pair. 

Bonds to Sulphur or Selenium.— Values for the dissociation energies (Do) of the diatomic species PS, PSe, and PTe, determined by Knudsen-cell mass spectrometry, are 438, 360, and 294 kJ mol 1, respectively.583 Some 3lP n.m.r. data for P4S3 in the polycrystalline state584 and in a nematic phase are now available.585 Displacement of one carbon monoxide group from Mo(CO)6 occurs on reaction with P4S3, giving (84),586 and crystal data show... 

Bonds to Sulphur or Selenium.— Arsenic, antimony, and bismuth trichlorides react with bis(2-mercaptoethyl) sulphide, liberating hydrogen chloride and forming the cyclic compounds (99).686 Complete spectroscopic data... 

Bonds to Sulphur or Selenium.—A polymeric anion (136) formed from edge-sharing pseudo-trigonal-bipyramidal units is present in the red thioantimonite... 

The unique features of reagent BMC reside in both the high concentration of its active chlorinating species (CljS", or the like) and the tempered aggression of its positive chlorine, assumed to be bonded to sulphur. Nevertheless, it is important to mention that at high temperatures (above 80°C) or with long reaction times, BMC may cause chlorinolysis, usually assisted by steric strain of the substrate. 

Bonds to Sulphur or Selenium.—Structures (114) and (115), respectively, are assigned on the basis of i.r. data, etc.y to the sulphides P4S9 and P4S4 obtained... 

Bonds to Sulphur or Selenium.—Gas-phase laser Raman spectra of mixed arsenic-sulphur vapours show that the arsenic-rich mixtures contain AS4, AS4S3, AS4S4, and AS2S2. Far-i.r. and 1 and As n.q.r. spectra for AS2S3 and AsSI and the selenium analogues have been measured. ... 

Bonds to Sulphur or Selenium.— The crystal structure of Bi2ln4S9, recently synthesized by vapour-transport reactions with iodine, indicates that three of the indium atoms are octahedrally co-ordinated by sulphur while the fourth... 

Bonds to Sulphur or Selenium.—Reviews have appeared on phosphorus sulphides and selenides and on the chemistry of chiral thio- and seleno-derivatives of a range of phosphorus acids. ... 

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