Liu Xiaojing, Tian Ruijing, Zhang Cailing, Zhi Xia, Pan Qinhe
Department of Materials and Chemical Engineering, Ministry of Education, Key Laboratory of Advanced Materials of Tropical Island Resources, Hainan University, Haikou 570228, People's Republic of China.
Acta Crystallogr Sect E Struct Rep Online. 2012 Jul 1;68(Pt 7):m989-90. doi: 10.1107/S1600536812028188. Epub 2012 Jun 30.
In the title compound, {[Ga(2)(C(4)H(4)O(6))(2)(OH)(2)]·2H(2)O}(n), the Ga(III) atom is located on a twofold rotation axis and is six-coordinated by two O atoms from bridging hydroxide groups and four O atoms from two symmetry-related tartrate units in a slightly distorted octa-hedral environment. Each tartrate unit binds to two Ga(III) atoms as a bis-chelating bridging ligand by two pairs of hydroxide groups and an O atom of a carboxyl-ate group. The Ga(III) atoms are linked by two bridging hydroxide groups located on mirror planes. In this way a chain along the c axis is formed. Free water mol-ecules on mirror planes are located between the chains and hold them together through hydrogen-bonding inter-actions, with O⋯O distances in the range 2.509 (3)-3.179 (5) Å.
在标题化合物{[Ga₂(C₄H₄O₆)₂(OH)₂]·2H₂O}ₙ中，Ga(III)原子位于二重旋转轴上，在略微扭曲的八面体环境中，由来自桥连羟基的两个O原子和来自两个对称相关酒石酸酯单元的四个O原子进行六配位。每个酒石酸酯单元通过两对羟基和一个羧酸盐基团的O原子作为双螯合桥连配体与两个Ga(III)原子结合。Ga(III)原子通过位于镜面上的两个桥连羟基相连。这样就形成了一条沿c轴的链。镜面上的游离水分子位于链之间，并通过氢键相互作用将它们维系在一起，O⋯O距离在2.509(3) - 3.179(5) Å范围内。
