59Co-NMR-spektroskopische Untersuchungen an [Co(NO)2X(PZ3)]-Komplexen / 59Co NMR Spectroscopic Investigations of [Co (NO) 2X (PZ3)] Complexes
Open Access
- 1 June 1972
- journal article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung B
- Vol. 27 (6) , 625-630
- https://doi.org/10.1515/znb-1972-0607
Abstract
59Co-nmr-spectroscopic investigations of solutions of the complexes [Co (NO)2X(PZ3)]* in CH2Cl lead to relations between the chemical shift τo and bonding parameters of the Co-X-bond and the Co-PZ3-bond, respectively. With decreasing chemical shift, covalency of the Co-X-bond is increasing in the order Cl3 ligands, τCo is a measure of the π-acceptor ability of PZ3, which increases in the order PPh3 ∼ PPh2Z ∼ PPhCl2 < alkylphosphine ∼ phenylalkylphosphine ∼ phosphines containing NR2-groups < phosphines containing OR-groups. The different π-accetor abilities are explained by varying Z-P-interaction.Keywords
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