A macrocyclic binuclear copper(II) complex of the ligandN,N′-bis(pyridin-2-ylmethyl)pyrazine-2,3-dicarboxamide

Abstract

Key indicatorsSingle-crystal X-ray study T = 153 K Mean '(C±C) = 0.005 A Ê R factor = 0.029 wR factor = 0.060 Data-to-parameter ratio = 11.7For details of how these key indicators were automatically derived from the article, see

catena-Poly[[bis(pyrazine-2-carboxamide-κN4)mercury(II)]-di-μ-bromido]

“…For metal-binding properties of pyridine and pyrazine ligands, see: Sasan et al (2008); Khavasi et al (2009); Petro & Mukherjee (1999); Sigh & Mukherjee (2005). For the coordination modes of pyrazineamide, see: Hausmann & Brooker (2004); Cati & Stoeckli-Evans (2004); Miyazaki et al (2007). Data collection: X-AREA (Stoe & Cie, 2005); cell refinement: X-AREA; data reduction: X-AREA; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997); software used to prepare material for publication: WinGX (Farrugia, 1999…”

“…The coordination chemistry of parazineamides is rich. Examples of coordination via the pyrazine N atoms, the carbonyl O atoms and the amide N atoms of the ligand in a non-, mono-, or bis-deprotonated form are known (Hausmann & Brooker, 2004;Cati & Stoeckli-Evans, 2004;Miyazaki et al, 2007) and metal complexes of the ligands have been used extensively to mimic the properties of biologically active systems. Here we synthesized the title compound, (I), and report here its crystal structure.…”

Diaquabis(pyrazine-2-carboxamide-κ2N1,O)cobalt(II) dinitrate

“…For the chelating bidentate coordination mode, see: Tanase et al (2008); Prins et al (2007); Sekisaki (1973). For coordination by pyrazine carboxamide moieties, see: Hausmann & Brooker (2004) ;Cati & Stoeckli-Evans (2004).…”