Zhu Li-Cai, Zhu Si-Ming
Acta Crystallogr Sect E Struct Rep Online. 2011 Aug 1;67(Pt 8):m1054-5. doi: 10.1107/S1600536811026134. Epub 2011 Jul 9.
The title compound, {[AgSm(C(6)H(4)NO(2))(2)(CH(3)CO(2))(H(2)O)]ClO(4)}(n), is a three-dimensional heterobimetallic complex constructed from a repeating dimeric unit. Only half of the dimeric moiety is found in the asymmetric unit; the unit cell is completed by crystallographic inversion symmetry. The Sm(III) ion is eight-coordinated by four O atoms of four different isonicotinate ligands, three O atoms of two different acetate ligands, and one O atom of a water mol-ecule. The two-coordinate Ag(I) ion is bonded to two N atoms of two different isonicotinate anions, thereby connecting the disamarium units. In addition, the isonicotinate ligands also act as bridging ligands, generating a three-dimensional network. The coordinated water mol-ecules link the carboxyl-ate group and acetate ligands by O-H⋯O hydrogen bonding. Another O-H⋯O hydrogen bond is observed in the crystal structure. The perchlorate ion is disordered over two sites with site-occupancy factors of 0.560 (11) and 0.440 (11), whereas the methyl group of the acetate ligand is disordered over two sites with site-occupancy factors of 0.53 (5) and 0.47 (5).
标题化合物{[AgSm(C₆H₄NO₂)₂(CH₃CO₂)(H₂O)]ClO₄}ₙ是一种由重复二聚体单元构成的三维异双金属配合物。在不对称单元中仅发现二聚体部分的一半；晶胞通过晶体学反演对称性得以完整。Sm(III)离子由四个不同异烟酸酯配体的四个O原子、两个不同乙酸酯配体的三个O原子以及一个水分子的一个O原子八配位。两配位的Ag(I)离子与两个不同异烟酸根阴离子的两个N原子键合，从而连接双钐单元。此外，异烟酸酯配体还充当桥连配体，形成三维网络。配位水分子通过O—H⋯O氢键连接羧酸根基团和乙酸酯配体。在晶体结构中还观察到另一个O—H⋯O氢键。高氯酸根离子在两个位置无序，占位因子分别为0.560 (11)和0.440 (11)，而乙酸酯配体的甲基在两个位置无序，占位因子分别为0.53 (5)和0.47 (5)。
