SYNTHESIS OF CYCLOPENTADIENYLDICARBONYL(DITHIOCARBENE)IRON CATIONS AND THEIR REACTIONS WITH AMINES

Dithiocarbene complexes, Cp(CO)2Fe[C(SR)SR']+, are easily prepared by R'SO3F alkylation of the dithioester ligand of Cp(CO)2FeC(⩵S)SR. The dimethyl derivative, Cp(CO)2Fe[C(SCH3)2]+, shows unusual reactivity toward nucleophilic amines to provide a variety of Cp(CO)2FeL+ derivatives. Primary amines produce isocyanide complexes, Cp(CO)2Fe(CNR)+; secondary amines give amino-thiocarbene complexes, Cp(CO) 2Fe [C(NR2)SCH3]+; diamines, amino alcohols, and amino thiols yield complexes with cyclic carbene ligands, [formula omitted] where Y=NH, O. o. S. The novel orthothiofOrmate complex Cp(CO)2Fe[C(SCH3)3] is formed as a byproduct in some of the reactions. Spectral properties of the new complexes are discussed. © 1979, American Chemical Society. All rights reserved.