Liu Wei-Sheng, Wang Hui-Juan, Tang Xiao-Liang, Zang Zhi-Peng, Wang Da-Qi
Acta Crystallogr Sect E Struct Rep Online. 2008 Jul 31;64(Pt 8):m1087. doi: 10.1107/S1600536808021259.
In the title compound, [Pr(C(32)H(30)N(2)O(6))(NO(3))]·CHCl(3), the Pr(III) ion is ten-coordinated by eight O atoms and two N atoms from the acyclic crown-type Schiff base ligand and the bidentate nitrate group. The coordination polyhedron around Pr(III) is a distorted bicapped square anti-prism. The chloro-form solvent mol-ecule is not involved either in coordination to the Pr(III) center or in hydrogen bonding to the complex. The Pr-O(phenolate) bonds are significantly shorter than the Pr-O(ether) and Pr-O(nitrate) bonds, which suggests that the Pr-O(phenolate) bond is stronger than these other bonds. In the crystal structure, the acyclic crown-type Schiff base ligand wraps around the Pr(III) centre, forming a pseudo-ring.
在标题化合物[Pr(C₃₂H₃₀N₂O₆)(NO₃)]·CHCl₃中，Pr(III)离子由来自无环冠型席夫碱配体的八个O原子和两个N原子以及双齿硝酸根基团十配位。Pr(III)周围的配位多面体是一个扭曲的双帽四方反棱柱。氯仿溶剂分子既不参与与Pr(III)中心的配位，也不参与与配合物的氢键作用。Pr-O(酚盐)键明显短于Pr-O(醚)键和Pr-O(硝酸盐)键，这表明Pr-O(酚盐)键比其他键更强。在晶体结构中，无环冠型席夫碱配体围绕Pr(III)中心缠绕，形成一个假环。
