Studies in eight-co-ordination. Part II. The electron spin resonance of, and crystal field in, calcium copper acetate hexahydrate

1 January 1970

journal article
research article
Published by Royal Society of Chemistry (RSC) in J. Chem. Soc. A

p. 1716-1722
https://doi.org/10.1039/j19700001716

Abstract

The e.s.r. behaviour of single crystals of calcium copper acetate hexahydrate and calcium cadmium acetate hexahydrate containing ca. 0·5% copper has been investigated at Q-band frequencies in the temperature range from room temperature to that of liquid nitrogen. At room temperature g_∥= 2·365, g_⊥= 2·064, A_∥(⁶³Cu)= 0·0143, and A_⊥(⁶³Cu)= 0·0015 cm.^–1. At temperatures <140°K the e.s.r. measurements show that a small structural change occurs. The room-temperature e.s.r. data, coupled with published single-crystal polarised spectral measurements, are interpreted in terms of a simple crystal-field model. The nature of the bonding in the complex is also discussed.

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