Compounds containing Sulphur, Nitrogen, and other Elements in the Ring

The composition of the compound was established by elemental analysis and its mass spectrum. The n.m.r. and i.r. spectra may be tentatively assigned to a symmetrical molecule, and it was therefore suggested that the compound has the structure (36). The sulphur atoms of the eight-membered 

The synthesis and properties of cyclic hydrazine derivatives with N—N and N—S bonds have been investigated.119 The reaction of hydrazine-1,2-di-carboxylic esters with suiphanyl chlorides by a base-catalysed mechanism leads to the formation of six-, seven-, and eight-membered heterocycles. 

The sulphonyl isocyanates RS02NC0 (R = F, Cl, or CF3) have been shown to react120 with bis(trifluoromethyl)diazomethane at 100—160 °C to give l,2,3-oxathiazol-4-one 2-oxides (37). The fluorine-substituted form of 

A study121 of the thermolysis of C1S02N=PC12—N=PC12—NMeSiMe3 in tetrachloroethane has shown the product to be a white, crystalline material with the composition MeCl4N302P2S4. I.r., n.m.r., 31P n.m.r., and mass 

The silicon-sulphur-nitrogen ring compounds (46) and (47), with single bonds in the ring structure and with sulphur in the 6+ oxidation state, have been prepared for the first time.127 

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