Acta Cryst. (2011). E67, m1054-m1055  [ doi:10.1107/S1600536811026134 ]

Poly[[(₂-acetato-³O,O':O')aquabis(₃-isonicotinato-³O:O':N)samarium(III)silver(I)] perchlorate]

L.-C. Zhu and S.-M. Zhu

Abstract: The title compound, {[AgSm(C₆H₄NO₂)₂(CH₃CO₂)(H₂O)]ClO₄}_n, is a three-dimensional heterobimetallic complex constructed from a repeating dimeric unit. Only half of the dimeric moiety is found in the asymmetric unit; the unit cell is completed by crystallographic inversion symmetry. The Sm^III ion is eight-coordinated by four O atoms of four different isonicotinate ligands, three O atoms of two different acetate ligands, and one O atom of a water molecule. The two-coordinate Ag^I ion is bonded to two N atoms of two different isonicotinate anions, thereby connecting the disamarium units. In addition, the isonicotinate ligands also act as bridging ligands, generating a three-dimensional network. The coordinated water molecules link the carboxylate group and acetate ligands by O-HO hydrogen bonding. Another O-HO hydrogen bond is observed in the crystal structure. The perchlorate ion is disordered over two sites with site-occupancy factors of 0.560 (11) and 0.440 (11), whereas the methyl group of the acetate ligand is disordered over two sites with site-occupancy factors of 0.53 (5) and 0.47 (5).

Online 9 July 2011

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