Paramagnetic ellipsoids and π bonding in dithiocyanatotetrapyridine-cobalt(II) and -iron(II)
- 1 January 1975
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 22,p. 2452-2459
- https://doi.org/10.1039/dt9750002452
Abstract
Average and principal susceptibilities of [Co(py)4(NCS)2] and [Fe(py)4(NCS)2] in the temperature range 80–300 K are reported. They have been fitted to the low-symmetry model described in the preceding paper, virtually perfect agreement being obtained between all three observed and calculated crystal susceptibilities for each molecule. The magnetic properties depend predominantly on π bonding, parameter values of which compare well between the two complexes and with otherwise established chemical-bonding concepts. In particular, pyridine is involved in a definite, but small, π-donating role to the metal atoms. The orientations of the molecular magnetic ellipsoids bear no simple relation to the approximate structural symmetry in these molecules.Keywords
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