CATENA(HEXA-AQUA-COBALT(II) TETRA-AQUA-(M-2-1,2,4,5-BENZENECARBOXYLATO-O,O %26apos;) -COBALT(II) HYDRATE): A NEW SYMMETRY FOR AN OLD POLYMORPHIC PHASE

作者：Maria Atria Ana; Teresa Garland Maria; Baggio Ricardo

来源：Journal of the Chilean Chemical Society, 2013, 58(1): 1576-1579.

• crystal structure
• polymorph
• cobalt

The title cobalt complex (C10H38Co2O26) consists of [Co(H2O)(4)(C10H2O8)](n)(2-) 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) %26quot;beads%26quot; 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, %26quot;sanwiched%26quot; 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.

• 出版日期2013-3