Diaquabis(4-carboxy-2-propyl-1H-imidazole-5-carboxylato-κ²N³,O⁴)copper(II)N,N-dimethylformamide disolvate

Abstract

In the title complex, [Cu(C8H9N2O4)2(H2O)2]·2C3H7NO, the CuII ion, lying on an inversion center, is six-coordinated in a slightly distorted octa­hedral geometry. Two N atoms and two O atoms from two H2pimda (H3pimda is 2-propyl-1H-4,5-dicarb­oxy­lic acid) ligands are in the equatorial plane. The axial positions are occupied by two O atoms from two water mol­ecules. A two-dimensional supra­molecular network parallel to (001) is constructed by N—H⋯O and O—H⋯O hydrogen bonds. An intra­molecular O—H⋯O hydrogen bond is also observed.

Histaminol and Its Complexes with Copper(II) – Studies in Solid State and Solution

“…Such bond lengths are typical of equatorial Cu–N and Cu–O interactions in six‐coordinate copper(II) complexes with imidazole derivatives, including histamine and histidine ligands . However, degree of tetragonal distortion in such compounds is diverse and depends on composition of coordination centers . Compounds with the CuN 4 O 2 chromophore usually exhibit tetragonality T around 0.80,, , , , as also calculated for the complex 3 .…”

“…Compounds with the CuN 4 O 2 chromophore usually exhibit tetragonality T around 0.80,, , , , as also calculated for the complex 3 . Those with CuN 2 O 4 show a wider scope of T values 0.72–0.86 , , …”

“…Equatorial bond lengths in complexes 2 and 3 and also four almost coplanar bonds in 1 , take values in the range 1.942(3) to 2.016(2) Å. Such bond lengths are typical of equatorial Cu–N and Cu–O interactions in six‐coordinate copper(II) complexes with imidazole derivatives, including histamine and histidine ligands . However, degree of tetragonal distortion in such compounds is diverse and depends on composition of coordination centers .…”

Diaquabis(5-carboxy-2-propyl-1H-imidazole-4-carboxylato-κ2N3,O4)manganese(II) 3.5-hydrate

“…For our previous structural studies of complexes with H 2 pimda À , see: Yan et al (2010); Li et al (2010); ; He et al (2010); Fan et al (2010).…”

“…Data collection: APEX2 (Bruker, 2004); cell refinement: SAINT (Bruker, 2004); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXL97. (He et al, 2010) and Diaquabis(5-carboxy-2-propyl-1H-imidazole-4-carboxylato-k 2 N 3 ,O 4 )nickle(II) tetrahedrate (Fan et al, 2010). In this paper, we report the structure of a new Mn(II) complex obtained under hydrothermal conditions.…”