A 35Cl NQR STUDY OF ORTHO-CHLORINES IN COBALT(II) 4-SUBSTITUTED-2,6-DICHLOROPHENOLATES

Article abstract of DOI:10.1016/0022-2860(83)85131-X

The 35Cl NQR spectra of some cobalt(II) 2,4,6-trichlorophenolates, 2,6-dichlorophenolates, and 4-bromo-2,6-dichlorophenolates, including two of known crystal structures, have been investigated to study the nature of organochlorine-to-cobalt coordinate covalent bonding.As expected, the difference in frequency of the coordinated and the non-ccordinated ortho-chlorines increases (to as high as 3 MHz, corresponding to the donation of about 0.1 electron by the coordinated organochlorine) as the metal-chlorine bond distance decreases (to as short a dsitance as 262 pm).The frequency difference is found to be temperature-dependent (less at higher temperatures) if the difference at 77K axceeds about 1.3 MHz.