Sulfido compounds

This account would not be complete without mention of distortional isomerism, a term Joe Chatt was to coin in describing two isomeric forms of the six-coordinate compounds, [Mo(0)Cl2(PMe2Ph)3] (35, Figure 12) in a short communication published in Chem. Commun. in 1971, but which later was to spark an intense debate into the reality or otherwise of the phenomenon of bond stretch isomerism. We followed the debate with some interest, since we had inadvertently stumbled across seven-coordinate oxo and sulfido compounds of niobium of the type [Nb(E)Cl3(PMe3)3] (E = O or S 36) which seemed to show a closely related effect. 

JMmid azolines 19, 426 ketones 17, 204 oxazolidines 18, 373 —, 2-imino- 19, 377 2-oxazolidones 19, 442 —, 3-amino- 20, 287 sulfido compounds... 

N-thiodicarboxylic acid imides 16, 370 —, cyclic (s. a. Sulfido compounds)... 

Sulfido compounds from 2-mesyloxythiocyanates with epimerization... 

Synthesis of ethylene derivatives from thioketones and diazo compounds via sulfido compounds... 

Other bis(phosphane) ligands have found use in supporting this type of dinickel(I) compound. Starting from a known dinickel(I) dihydride [Ni2(dippe)2( i-H)2] [32], the dinickel(I) hydride thiolate compound [Ni2(dippe)2( i-H)( i-S-2-biphenyl)] (52) was separated as an intermediate of hydrodesulfurization of biphenyl-2-thiol [33], and was further converted into the dinickel(I) sulfido compound [Ni2(dippe)2( i-S)] 53 (Scheme 10.22 ), with concomitant formation of biphenyl [34]. 

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