where 2|J| is the singlet–triplet separation. Some evidence is found that |J| increases with increasing base strength of the chelating anions, but there is no obvious correlation with analogous properties of the alkoxo-groups. The preparation and properties of [Cu(O2CMe)(OMe)] are also reported; its magnetic susceptibility and mass spectrum provide some support for a tetranuclear structure.
据报道,配合物[Cu(pd)(OR)](R = Me,Et,Pr n或PhCH 2:pd =
戊烷-2,4-dionato)的磁化率介于80和370 K之间。sal)(OCH 2 Ph)](sal =
水杨醛),[Cu(hacp)(OR)] hacp =
2'-羟基苯乙酮; R = Pr n或Bu n)和[Cu(hnc)(OR)](Hhnc = 1-羟基
萘-2-甲醛; R = Pr n或Bu n或PhCH 2),(I)–(X)分别。假定这些化合物包含带有桥联烷氧基的二聚体分子来解释数据。交换参数(通过对g和J进行曲线拟合来估计变化)都是负数,|的值 J | (I)–(X)分别为378、211、133、312、266、179、214、131、145和174 cm –1,其中2 | J | 是单重态-三重态分离。发现一些证据表明| J | 螯合阴离子的碱强度增加时,其增加,但是与烷氧基的类似性质没有明显的相关性。还报道了[Cu(O