Djehni Samia, Balegroune Fadila, Guehria-Laidoudi Achoura, Dahaoui Slimane, Lecomte Claude
Laboratoire de Cristallographie-Thermodynamique, Faculté de Chimie, USTHB, BP 32, El-Alia, Bab-Ezzouar 16111, Alger, Algeria.
Acta Crystallogr C. 2007 Mar;63(Pt 3):m91-3. doi: 10.1107/S0108270107001874. Epub 2007 Feb 10.
In the title compound, [Ba{HOOC(C(6)H(4))(2)CO(2)}(2)(H(2)O)(2)] or [Ba(C(14)H(9)O(4))(2)(H(2)O)(2)], the Ba atoms are coordinated by nine O atoms, six from two 2'-carboxybiphenyl-2-carboxylate (Hbpdc(-)) ligands and three from three coordinated water molecules, resulting in the formation of face-sharing distorted monocapped square antiprisms. The Hbpdc(-) ligands bridge the Ba atoms to form a one-dimensional helical polymer, with a Ba...Ba distance across the chain of 4.1386 (17) A. Adjacent chains are parallel to each other. The two independent ligands are tetradentate and have the same coordination mode, exhibiting mu-oxo bridges and eta(8)-chelation. The crystal structure is further stabilized by hydrogen bonds within each chain.
在标题化合物[Ba{HOOC(C₆H₄)₂CO₂}₂(H₂O)₂]或[Ba(C₁₄H₉O₄)₂(H₂O)₂]中，Ba原子由九个O原子配位，其中六个来自两个2'-羧基联苯-2-羧酸根（Hbpdc⁻）配体，三个来自三个配位水分子，形成了面共享的扭曲单帽方反棱柱结构。Hbpdc⁻配体桥连Ba原子形成一维螺旋聚合物，链间Ba...Ba距离为4.1386(17) Å。相邻链相互平行。两个独立的配体为四齿配体且具有相同的配位模式，呈现出μ-氧桥和η⁸-螯合作用。晶体结构通过每条链内的氢键进一步稳定。
