Saravanan Natarajan, Selvam Parasuraman
National Centre for Catalysis Research, Department of Chemistry, Indian Institute of Technology-Madras, Chennai 600 036, India.
Acta Crystallogr Sect E Struct Rep Online. 2014 Aug 13;70(Pt 9):m326-7. doi: 10.1107/S1600536814017814. eCollection 2014 Sep 1.
In the title monomeric manganese(II) complex, [Mn(CH3COO)2(C10H8N2)(H2O)2], the metal ion is coordinated by a bidentate 2,2'-bi-pyridine (bpy) ligand, two water mol-ecules and two axial acetate anions, resulting in a highly distorted octa-hedral environment. The aqua ligands are stabilized by the formation of strong intra-molecular hydrogen bonds with the uncoordinated acetate O atoms, giving rise to pseudo-bridging arrangement of the terminal acetate groups. In the crystal, the mol-ecules form [010] zigzag chains via O-H⋯O hydrogen bonds involving the aqua ligands and acetate O atoms. Further, the water and bpy ligands are trans to each other, and are arranged in an off-set fashion showing inter-molecular π-π stacking between nearly parallel bi-py rings, the centroid-centroid separations being 3.8147 (12) and 3.9305 (13) Å.
在标题单体锰（II）配合物[Mn(CH₃COO)₂(C₁₀H₈N₂)(H₂O)₂]中，金属离子由双齿2,2'-联吡啶（bpy）配体、两个水分子和两个轴向醋酸根阴离子配位，形成高度扭曲的八面体环境。水配体通过与未配位的醋酸根O原子形成强分子内氢键而得以稳定，导致末端醋酸根基团形成假桥连排列。在晶体中，分子通过涉及水配体和醋酸根O原子的O—H⋯O氢键形成[010]锯齿链。此外，水和bpy配体彼此反式排列，并以错位方式排列，在近乎平行的联吡啶环之间呈现分子间π-π堆积，质心间距为3.8147 (12) 和3.9305 (13) Å。
