Magnetic studies on the nitrate and bromide salts of the cation di-μ-hydroxobis [di( 1, 10-phenanthroline)chromium(III) ] 4

• Published in: Inorganica Chimica Acta Vol. 23; pp. 235 - 238
• Main Authors: Drake, R.F., Scaringe, R.P., Hodgson, D.J., Hatfield, W.E.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 1977
• ISSN: 0020-1693; 1873-3255
• DOI: 10.1016/S0020-1693(00)94767-4

The magnetic susceptibilities of powdered samples of di-μ-hydroxobis [di(1,10-phenanthroline)chromium(III)](NO 3) 2·7H 2O, and the analogous bromide octahydrate salt have been determined in the temperature range 5 to 283 °K. The dimers exhibit antiferromagnetic exchange interactions with the best fits to the Van Vleck expression for exchange coupled S = 3/2 ions including biquadratic exchange yielding, for the nitrate salt, g = 1.98 ± 0.03, 2J = −42.2 ± 0.5 cm −, and J = 0 cm − and for the bromide salt, g = 1.95 ± 0.03,2J = −29.2 ± 0.6 cm −1, and j = 0.5 ± 0.1 cm −1.