Bis(2,3-diaminopyridinium) bis(μ-pyridine-2,6-dicarboxylato)-κ⁴O²,N,O⁶:O⁶;κ⁴O²:O²,N,O⁶-bis[aqua(pyridine-2,6-dicarboxylato-κ³O²,N,O⁶)bismuthate(III)] tetrahydrate

Abstract

In the centrosymmetric dinuclear complex anion of the title compound, (C5H8N3)2[Bi2(C7H3NO4)4(H2O)2]·4H2O, the BiIII atom is eight-coordinated in an N2O6 environment and has a distorted bicapped trigonal–prismatic coordination environment. Extensive inter­molecular O—H⋯O, N—H⋯O and weak C—H⋯O hydrogen bonds lead to the stability of the crystal structure. Inter­actions between one C—H group of the 2,3-diamino­pyridinium [(2,3-dapyH)+] cation and the aromatic ring of the pyridine-2,6-dicarboxyl­ate (pydc) ligand (C—H⋯centroid distance = 2.78 Å) and π–π inter­actions between the (2,3-dapyH)+ cations and between the (2,3-dapyH)+ cation and the pydc ligand [centroid–centroid distances = 3.489 (5) and 3.694 (5) Å] are observed.

A linear heterometallic bismuth–copper coordination polymer containing two types of organic ligands

“…Because the metal is trivalent and the carboxylic acid diprotic, some compounds exist as salts; in these bismuthates, the negative charge is balanced by an ammonium counter-ion. Neutral compounds have also been isolated (Aghabozorg, Nemati et al, 2008;Aghabozorg, Ramezanipour et al, 2008;Aghabozorg et al, 2011;Anjaneyulu et al, 2010;Anjaneyulu & Kumara Swamy, 2011;Jeon et al, 2012;Ranjbar et al, 2003;Sharif et al, 2007;Sheshmani et al, 2005;Soleimannejad & Gholizadeh, 2012;Sushrutha & Natarajan, 2013;Stavila et al, 2009;Thirumurugan et al, 2012;Zevaco et al, 1992;Zhang, Wang et al, 2013).…”