scale. Solvent role is solvation of the tin anion on one hand and the extent of isolation of ions: from “close pair” in CCl4 to “solvate separated pair” in methanol on the other hand. It is determined by solvent permittivity and dipole moment. Temperature dependence of hyperfine coupling constant with tin magnetic nuclei allowed estimating enthalpy and entropy of solvation. Temperature dependence of EPR
摘要 bis-o-semiquinonato
镍络合物 (2,2ʹ-dipyridine)Ni(dioxolene)2 (1)(此处为 dioxolene – 3,6-di-tert-butyl-o-benzoquinone 的单还原或双还原形式)的反应) 或其
钴类似物 (2,2ʹ-dipyridine)Co(dioxolene)2) 与 (2,2ʹ-dipyridine)Sn(dioxolene)2 通过
配体交换发生并生成ate-complex [(2,2ʹ-dipyridine)2M (二
氧戊环)]+ [Sn(二
氧戊环)3]- (M = Ni (2), Co(3))。根据单晶 X 射线衍射研究,两种产品都是同构的。
锡阴离子的几何形状介于八面体和三棱柱之间。
锡阴离子螯合循环中的键长分析,二氧杂
环戊烯配体之一是半醌阴离子自由基,而另外两个是
儿茶酚二价阴离子。两种阳离子的内部配位核的几何形状接近八面体。处于