Abstract
New copper(II) and nickel(II) complexes with 2-alkoxy-phenols have been prepared. The visible spectra of the copper(II) complexes indicated a quasi-tetrahedral stereochemistry for two of them, and a distorted octahedral stereochemistry for the remainder. Magnetic susceptibilities for most of the copper(II) complexes have been determined over the range of temperature 80-300 K, and the anhydrous complexes showed a variable degree of antiferromagnetic interaction. No unambiguous theoretical interpretation of the magnetic data as a function of the degree of aggregation was achieved, but in the case of bis(2-methoxyphenolato)copper(II), which has a quasi-tetrahedral stereochemistry as indicated by its visible spectrum, the very existence of antiferromagnetism pointed to a polymeric linear chain structure. Unequivocal infra-red evidence for the participation of the alkoxy group in coordination was not found, but the spectra of some Of the nickel(II) complexes showed tentative evidence of methoxy group coordination. Because of the uncertainty of the bonding role of the alkoxy group, the number of possible structures for the complexes was increased. The visible spectra and magnetic properties of the nickel(II) complexes were consistent with an octahedral stereochemistry. A comparison of the copper(II) and nickel(II) series of complexes is given.