CobaltI 7200 DOI: 10.1002/chin.201121017

Novel Polyselenidoarsenate and Selenidoarsenate: Solvothermal Synthesis and Characterization of [Co(phen)3][As2Se2(μ-Se3)(μ-Se5)] and [Co(phen)3]2[As8Se14]. — The structures of title compounds (III) (monoclinic, space group C2, Z = 4) and (IV) (triclinic, P1, Z = 1) are determined by single crystal XRD. In (III), As(Se) units are alternately joined by μ-Se3 and μ-Se5 bridges to form a novel helical polyselenidoarse-nate chain 1∞[AsSe(μ-Se3)AsSe(μ-Se5)

2-]. In (IV), eight pyramidal AsSe3 units are con-nected via corner sharing into the new member of the selenidoarsenate aggregate [As8Se14]

4- with a condensation grade of 0.571, which represents the first discrete sele-nidoarsenate(III) with a condensation grade of above 0.50. — (ZHAO, J.; LIANG, J.; CHEN, J.; PAN, Y.; ZHANG, Y.; JIA*, D.; Inorg. Chem. 50 (2011) 6, 2288-2293, http://dx.doi.org/10.1021/ic1024444 ; Coll. Chem., Chem. Eng. Mater. Sci., Soochow Univ., Suzhou 215123, Peop. Rep. China; Eng.) — Schramke

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ChemInform 2011, 42, issue 21 © 2011 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim