Reactions of K_2lFe(CO)_3(PPh_3)]:Reductive Sb-Sb Coupling with Ph_2SbCl To Form trans-lFe(CO)_3(PPh_3)(Sb_2PH_4)] and Salt Metathesis with Me_3SbCl_2 To Yield trans-[Fe(CO)_3(PPh_3)(SbMe_3)]

摘要

In contrast to the ferrate K_2[Fe(CO)_4],the phosphane-substi-tuted ferrate K_2[Fe(CO)_3(PPh_3)](1)reacts with the stibane derivative Ph_2SbCl by metal-assisted reductive Sb-Sb coupling to give the distibane complex trans-[Fe(CO)_3(PPh_3)-(Sb_2PH_4)](3).The distibane ligand in 3 is terminally eta~1-coord-inated trans to the phosphane ligand.However,the stiborane derivative Me_3SbCl_2 reacts with 1 in a metathetical substitu-tion reaction to form the monostibane complex trans-[Fe-(CO)_3(PPh_3)(SbMe_3)](5).Both compounds have been characterized by spectroscopic(IR,NMR,MS),analytical(C,H)and X-ray diffraction analyses.