Poly[tris(μ3-2-aminoethanesulfonato)cobalt(II)potassium]

The title compound, [CoK(C2H6NO3S)3]n, is isotypic with its NiII analogue. The CoII atom is chelated by the three taurinate ligands in a distorted octahedral geometry and in a facial manner. Each taurinate ligand bridges two K+ ions via its sulfonate group, forming a three-dimensional framework. Weak N—H⋯O hydrogen bonding is observed in the crystal structure.

The title compound, [CoK(C 2 H 6 NO 3 S) 3 ] n , is isotypic with its Ni II analogue. The Co II atom is chelated by the three taurinate ligands in a distorted octahedral geometry and in a facial manner. Each taurinate ligand bridges two K + ions via its sulfonate group, forming a three-dimensional framework. Weak N-HÁ Á ÁO hydrogen bonding is observed in the crystal structure.
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Comment
Taurine, an amino acid containing sulfur, is indispensable to human beings Because of its applications in medicine and biochemistry (Bottari & Festa,1998;Jiang et al.,2003). Several taurine complexes and their derivatives have recently been prepared (Zhong et al. (2003); Cai et al. (2004Cai et al. ( , 2006Cai et al. ( , 2011Yang et al. (2010a,b)). we found that the taurine has manifold coordination modes. For the much less well study of the coordination modes of the sulfonate group, The title polymeric Co II complex,(I), has been prepared and its structure determined.
The coordinated modes of the title compound are similar to the previously reported Ni (II) structure (Jiang et al. (2005)).
The molecular structure of (I) is shown in Fig. 1 and the important bond lengths are listed in Table 1. The asymmetric unit of (I) consists of one Co II atom, three taurinate ligands and one K + ion. The cobalt is six-coordinate with three nitrogen