Bonding and structure in Fe(II) low-spin compounds using the Mössbauer effect
- 1 January 1969
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Discussions of the Faraday Society
- Vol. 47, 136-143
- https://doi.org/10.1039/df9694700136
Abstract
Mössbauer centre shifts (C.S.) and quadrupole splittings (Q.S.) are presented for a wide range of six-coordinate low-spin compounds, many of which have not been prepared previously. The centre shift is an additive property of the number and type of ligands in a particular compound, and partial centre shifts (P.C.S.) values have been derived for twenty-two ligands. The P.C.S. values can be related to the bonding properties of the various ligands, and the bonding properties of the novel ligand N2 have been examined and compared with those of CO. There is an inverse relationship between the P.C.S. values and the spectrochemical ranking of ligands. The trans:cis 2:1 quadrupole splitting ratio holds for ligands such as Cl–, SnCl– 3 as well as for CN–, and the variation of Q.S. with change in neutral ligand L for trans-FeL4Cl2 is discussed in terms of the bonding properties of the neutral ligands.Keywords
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