Synthesis and Structural Study of the Bis(ethylenediamine)CdFe(CO)4 Monomer

The new (en)2CdFe(CO)4 complex has been isolated from the crystallization of [(en)CdFe(CO)4]x from ethylenediamine (en). The cadmium center bears square-pyramidal coordination, with the iron atom occupying the apical position. The iron coordination may be described either as trigonal bipyramidal, with the cadmium atom being in an axial position, or as monocapped (by cadmium) tetrahedral. The Cd-Fe distance was found to be 2.6250(2) Å. The complex crystallizes in the monoclinic space group P21/a with a=14.4137(3) Å, b=7.65740(10) Å, c=14.5465(2) Å, and β=119.4972(9)° at 150(1) K