possess monomeric structures in the solid state with tetrahedral and square planar geometries about the chromium centers, respectively. [Cr(tBuNC(CH3)NEt)2]2 exists as a dimer in the solid state, with two mu2-amidinate ligands, two eta2-amidinate ligands, and a chromium-chromium bond length of 1.9601(12) A. [Cr(tBuNC(CH3)NEt)2]2 is diamagnetic in the solid state, as determined by magnetic susceptibility
用 2 当量的 Li[tBuNC(
CH3)NtBu]、Li[iPrNC( )NiPr] 或 Li[tBuNC( )NEt](由相应的碳二
亚胺和
甲基锂制备)处理
氯化
铬 (II),得到 Cr[ tBuNC( )NtBu]2 (1, 50%)、Cr[iPrNC( )NiPr]2 (2, 54%) 和 [Cr(tBuNC( )NEt)2]2 (3, 58%) 作为分别为深蓝色、紫色和琥珀色或
金属绿色晶体。Cr[tBuNC( )NtBu]2 和 Cr[iPrNC( )NiPr]2 在固态下具有单体结构,分别具有四面体和方形平面几何形状围绕
铬中心。[Cr(tBuNC( )NEt)2]2 在固态下以二聚体形式存在,具有两个 mu2-脒
配体、两个 eta2-脒
配体和 1.9601(12) A 的
铬-
铬键长。 [Cr (tBuNC( )NEt)2]2 在固态下是反磁性的,这是通过磁化率测量和