Research Article: catena-Poly[[[aqua­manganese(III)]-μ-(E)-5-bromo-N-[2-(5-bromo-2-oxidobenzyl­idene­amino)-4-nitro­phen­yl]-2-oxidobenzamidato] N,N-dimethyl­fomamide monosolvate]

Date Published: April 01, 2012

Publisher: International Union of Crystallography

Author(s): Abeer Mohamed Farag, Teoh Siang Guan, Hasnah Osman, Madhukar Hemamalini, Hoong-Kun Fun.


The asymmetric unit of the title complex, {[Mn(C20H10Br2N3O5)(H2O)]·(CH3)2NCHO}n, consists of one MnIII ion, one (E)-5-bromo-N-[2-(5-bromo-2-oxidobenzyl­idene­amino)-4-nitro­phen­yl]-2-oxidobenzamidate ligand (Schiff base), one water mol­ecule and an N,N-dimethyl­formamide mol­ecule. The coordination geometry around the MnIII ion is a distorted octa­hedron, being surrounded by two O and two N atoms from the Schiff base, which are positioned in the equatorial plane. The water mol­ecule and the O atom of the carbonyl group from the adjacent MnIII complex are situated at the axial positions, leading to a polymeric chain along the c axis. In the crystal, the complex and N,N-dimethyl­formamide mol­ecules are connected via O—H⋯O, C—H⋯O and C—H⋯Br hydrogen bonds, forming a three-dimensional network.

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For details of the coordination chemistry and biological importance of manganese, see: Maneiro et al. (2003 ▶); Chandra et al. (2009 ▶); Chrisianson & Cox (1999 ▶); Ni et al. (2009 ▶); Zhang et al. (2005 ▶); Huh & Lee (2008 ▶); Pastoriza-Santos & Liz-Marzań (2009 ▶). For related structures, see: Su & Xu (2005 ▶); Ma et al. (2004 ▶). For the stability of the temperature controller used in the data collection, see: Cosier & Glazer (1986 ▶).