CATENA(HEXA-AQUA-COBALT(II) TETRA-AQUA-(M2-1,2,4,5-BENZENECARBOXYLATO-O,O') -COBALT(II) HYDRATE): A NEW SYMMETRY FOR AN OLD POLYMORPHIC PHASE

Journal of The Chilean Chemical Society

BAGGIO, RICARDO¹  GARLAND, MARÍA TERESA²  ATRIA, ANA MARÍA³ 

[1] Comisión Nacional de Energía Atómica, Buenos Aires, Argentina;Universidad de Chile, Santiago de Chile, Chile;Universidad de Chile, Santiago, Chile

关键词: crystal structure;    polymorph;    cobalt.;   

DOI  :  10.4067/S0717-97072013000100016

学科分类：化学（综合）

来源: Sociedad Chilena de Quimica

【 摘 要 】

The title cobalt complex (C10H38Co2O26) consists of [Co(H2O)4(C10H2O8)]2-n anionic chains, balanced by [(Co(H2O)6]2+ cations and eight solvato water molecules, some of which are disordered. The chains are formed by Co(H2O)4 "beads" threaded by fully deprotonated benzenecarboxylato anions binding in a stretched, trans fashion, and they are linked by H-bonds into a 2D structure. The cationic groups and solvato water molecules form a second kind of 2D arrays, "sanwiched" by the latter ones and linking the lot into a 3D structure through a very complex H-bonding interaction scheme. The structure presents a very conspicuous pseudo symmetry, and it appears to be a slight polymorphic modification of an already published isologue of identical formulation but with the higher symmetry properly attained, in a volume half as large. The slight differences between both structures seems to reside mainly in the (disordered) solvates, as suggested by the overlap of both models.

【 授权许可】

Unknown