Iron Pentacarbonyl as a Precursor for Molecule-Based Magnets:  Formation of Fe[TCNE]₂(<i>T</i>_c= 100 K) and Fe[TCNQ]₂(<i>T</i>_c= 35 K) Magnets

Abstract

The reaction of tetracyanoethylene (TCNE) and 7,7,8,8-tetracyano-p-quinodimethane (TCNQ) with Fe(CO)(5) leads to formation of magnetically ordered materials of Fe[TCNE](2) (T(c) = 100 K) and Fe[TCNQ](2) (T(c) = 35 K) composition, respectively. In contrast, the reaction with 1,2-dichloro-5,6-dicyanobenzoquinone (DDQ) leads to a paramagnetic material.