Synthesis and solvent dependency study of a novel iron complex with mono-cyanide and mono-carbonyl coordination

A novel iron complex [(1,5,8,12-tetraazadodecane)-cyano-iron carbonyl] (1), in which the iron center is coordinated with one cyanide (CN) and one carbonyl (CO), was synthesized. 1’s X-ray crystallographic structure was determined. The structure shows that cyanide and carbonyl are in the cis-isomeric position. Further infrared study of 1 in a DMF/H2O system has shown that the both CN and CO stretching frequencies are very sensitive to the hydrogen bonding ability of the solvent system.