AN ELECTRON-SPIN-RESONANCE SPECTRAL STUDY OF BIS(DIMETHYLGLYOXIMATO)-COBALT(II) AND SOME PHOSPHINE AND PHOSPHITE ADDUCTS

• Type: Article in International Scientific Journal
• Date: 1990

Authors

DECASTRO, B (Author) FCUP; RANGEL, M (Author) ICBAS; RAYNOR, JB (Author) Other

Journal

Title: Journal of the Chemical Society. Dalton Transactions

Pages: 3311-3318

ISSN: 1472-7773

Publisher: Royal Society of Chemistry

Indexing

ISI Web of Knowledge - 15 Citations

Scopus - 15 Citations

Scientific classification

FOS: Natural sciences > Chemical sciences

Other information

Authenticus ID: P-001-REF

DOI: 10.1039/dt9900003311

Abstract (EN): E.s.r. spectra, at both X- and Q-band frequencies, were measured for frozen solutions of [Co(Hdmg)2] (H2dmg = dimethylglyoxime) and its adducts with a range of fourteen phosphines and phosphites. All spectra were indicative of a 2A1 [a(dz2) + b(dx2 - y2)] ground state, and from analysis of the cobalt and phosphorus hyperfine tensors and the g tensor, wavefunction and bonding parameters were calculated. The Q-band results unambiguously reveal rhombic symmetry for all adducts, with the formation of 1:1 adducts for all the bases with identical substituents and 1:2 adducts for the bases with mixed substituents. Attempts to assign the ground state to the [Co(Hdmg)2] complex in a diamagnetic matrix of [Ni(Hdmg)2] were also made.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8