The magnetic susceptibilities of some trinuclear copper(II) compounds

Abstract

The magnetic susceptibility of four trinuclear compounds of bivalent copper has been measured to very low temperatures. In two cases the measurements extend from room temperature to 4·2 K or below, and in two cases from room temperature to 80 K. the with addition of 4·2 K. The e.s.r. g-values for the cupric ion were determined. The results support the model of magnetic exchange between one cupric ion and its neighbours on each side, with no interaction between the latter. They allow a more accurate evaluation of the parameters which characterises the model. J is 43 cm^–1 in one instance and ca. 200 cm^–1 in three others, and g varies from 2·04 to 2·17.