Sulphur-Boron Ring Compounds

Boron—sulphur ring compounds are not as commonly occurring as those of oxygen. The chemical shifts of a four- and six-membered ring compound of the type (R2NBS) have been reported by Forstner and Muetterties. The two compounds and their shifts [p.p.m. from (MeO)3B] are shown in (28) and (29). Rather interestingly, the ethyl-thioborane EtSBH2 exists as a trimer and has a shift of -1-14 5 (p.p.m. 

Sulphur-Boron Ring Compounds.— Trimeric metathioboric acid (HSBS)3 has been shown to be monoclinic in the space group F2i/c, with a = 13.949, 6 = 4.133,c = 17.538 A, = 114.76. The molecules (41) form six-membered rings which are nearly planar. The mean bond distances for cyclic and... 

These compounds are numerous and may include carbon, oxygen, sulphur, boron, tin, titanium, vanadium and other elements in the ring. They are prepared by various... 

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