Complexes of Stiboranium Mono-, Di-, and Trications.

Reaction of Ph SbCl with 2,2'-bipyridine and Me SiOSO CF releases chlorobenzene, which is interpreted as a reductive (Sb /Sb ) elimination from a complex of a stiboranium cation. Conversely, reactions of Ph SbCl with 4-methylpyridine-N-oxide and AgOSO CF give redox-resistant complexes with the generic formulae [Ph SbCl L ][OTf] , including a compound containing a pnictogen(V) trication.

Substitution Reactions at BIAN Supported Fluoroantimony Cations Yielding Cyanoantimony and Azidoantimony Cations.

This work presents new cationic coordination complexes of antimony with the 1,2-bis[(2,6-diisopropylphenyl)imino]acenaphthene ( BIAN) ligand system. The fluoroantimony complexes [SbF( BIAN)][OTf] and [SbF ( BIAN)][OTf] have been successfully isolated and characterized. The fluorine substituent in the Lewis acidic complex [SbF( BIAN)][OTf] can be selectively replaced without degradation of the Sb- BIAN interaction to give the first dicationic azido and cyano derivatives, [Sb(CN)( BIAN)][OTf] and [Sb(N )( BIAN)][OTf] , which have been isolated and structurally characterized.