TRANSITION METAL DERIVATIVES OF ARENE DIAZONIUM IONS. X. FOUR-COORDINATE ARENEDIAZO DERIVATIVES OF IRON(-II) AND COBALT(-I)

Article abstract of DOI:10.1016/S0022-328X(00)82456-0

The first arenediazo derivatives of iron(-II), Fe(N2Ar)(NO)(CO)(PPh3), have been synthesised and their properties are described.A linear relationship has been found between ν(CO) in these complexes and ?^- for the para substituent in the arenediazo aryl ring.The 57Fe MOessbauer spectra of the complexes indicate that ⁺ is a stronger ?-donor and weaker ?-acceptor than ⁺.The relationship between ΔE_q and ?^-_p suggests that changes in ΔE_q with aryl substitution involve both substituent-specific and substituent-independent effects.The unstable cobalt(-I) compound Co(N2C6H5)(CO)2(PPh3), the first arenediazo derivative of cobalt, is also described.