Bismuth xanthate structures

The three remaining bismuth xanthate structures feature bismuth to carbon bonds. The molecular structure of PhBi(S2COMe)2 (251) is in essential agreement with that of the isolated PhSb(S2COEt)2 analogue (244). The xanthate ligands form distances of 2.649(3) and 2.961(2) A, and 2.670(3) and 3.079(3) A. 

Some antimony and bismuth xanthates tend to self-assemble through M - -S secondary bonds into supramolecular structures. 

XIII. XANTHATE STRUCTURES OF PHOSPHORUS, ARSENIC, ANTIMONY, AND BISMUTH... 

Dithioacid complexes of bismuth are numerous (Table 4) and repeat many of the structural motifs of their arsenic and antimony analogues, most notably the very asymmetric coordination ( anisobidentate ), although, as a consequence of the larger bismuth atom, higher coordination numbers are more evident. In the xanthates, seven-coordinate bismuth appears to be favored, although this is achieved in different ways in [Bi(S2COR)3] (R = PhCH2, c-CeHn, Bu ) there are... 

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