Organobridged dicobaloximes: Synthesis and NMR correlation

Article abstract of DOI:10.1016/S0022-328X(96)06885-4

Organobridged dicobaloximes of the type Py(L)₂Co^III-(CH₂)_n-Co^III(L)₂Py [L = dmgH^- and dpgH^-, n = 3,4,5,6 and 10] are synthesized by the reaction of Co^I(L)₂Py with the corresponding alkyl dihalides. A mixture of haloalkylcobaloximes and the dicobaloxime is formed in each reaction. The purification procedure for the dicobaloxime is established. A comparison of 'cis influence' due to the equatorial ligands in the haloalkyl and the dicobaloximes by ¹H NMR reveals that the extent of the cis influence on the Co-CH₂ resonance is more in the case of the dicobaloxime but it is nearly same for the P_α and the P_γ resonances.