Synthesis of high-spin five-co-ordinate Lewis-base adducts of bis(triazen-1-olato)cobalt(II). Studies of reversible dioxygen binding

Abstract

High-spin five-co-ordinate Lewis-base adducts of cobalt(II) triazene 1-oxide complexes have been prepared and their reactivity in reversible dioxygen binding studied. Monoclinic spin-Hamiltonian parameters are reported for the dioxygen complexes. An X-ray structure analysis of high-spin bis[3-(4-chlorophenyl)-1-methyltriazen-1-olato]cobalt(II)–pyridine (1/1) has been performed. The adduct crystallizes in the monoclinic system, space group P2/c, with a= 18.39(2), b= 12.553(9), c= 9.827(8)Å, β= 105.65(7)° and Z= 4. The co-ordination about the cobalt atom is distorted trigonal bipyramidal.