Arsenic-antimony bonds synthesis

The synthesis of stable complexes with transition metal-phosphorus triple bonds is of fundamental importance and opens a novel chapter of a special field of coordination chemistry. The synthesis of analogous complexes with ligands of the heavier homologues like arsenic has partially been carried out [6], while for antimony and bismuth, the elusive M=Sb and M=Bi systems have now moved within reach. Moreover, the experimental and theoretical... 

The chemistry of the E-Hlg (E=As, Sb, Bi) bonds has been featured prominently in the reported chemistry of seven-membered and larger rings containing arsenic, antimony, and bismuth. In work directed toward the synthesis of heterocyclic systems involving transannular Sb N interaction, 64 and 65 have been obtained from chloro-substituted stibocanes 63a by reaction with LiPh in hexane or NaOSiPh3 in toluene. To obtain the NCS-substituted 66, the iodo-substituted stibocanes 63b were reacted with AgSCN in dichloromethane (Equation 2) <1998POL2655>. 

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