Schatte Gabriele, Shen Jianheng, Reaney Martin, Sammynaiken Ramaswami
Acta Crystallogr Sect E Struct Rep Online. 2010 May 12;66(Pt 6):m634-5. doi: 10.1107/S1600536810016077.
The Na(+) cation in the title compound, Na(C(3)H(7)O(3)) or Na[H(2)gl], is coordinated by five O atoms leading to a distorted trigonal-bipyramidal geometry. The negatively charged O atom of the glycerolate anion is in an equatorial position, and the O atom of the hydroxo group, attached to the secondary C atom, occupies an axial position completing a five-membered non-planar chelate ring; this defines the asymmetric unit. The Na(+) cation is coordinated by three other symmetry-related monodentate H(2)gl(-) ligands, so that each H(2)gl(-) ligand is bonded to four Na(+) ions. The H(2)gl(-) ligands are connected via strong O-H⋯O hydrogen bonds and these, together with the Na⋯O inter-connections, are responsible for the formation of polymeric sheets which propagate in the directions of the b and c axes.
标题化合物[Na(C₃H₇O₃)]ₙ或Na[H₂gl]中的Na⁺阳离子由五个O原子配位，形成扭曲的三角双锥几何构型。甘油酸根阴离子带负电荷的O原子处于赤道位置，连接在仲碳原子上的羟基的O原子占据轴向位置，形成一个五元非平面螯合环；这确定了不对称单元。Na⁺阳离子由另外三个对称相关的单齿H₂gl⁻配体配位，因此每个H₂gl⁻配体与四个Na⁺离子键合。H₂gl⁻配体通过强O-H⋯O氢键相连，这些氢键与Na⋯O相互连接一起，导致形成在b轴和c轴方向传播的聚合物片层。
