trans-Diaquabis{1,3-bis[5-(2-pyridyl)-2H-tetrazol-2-yl]propane}zinc(II) bis(perchlorate)

Abstract

The ZnII ion in the title compound, [Zn(C15H14N10)(H2O)2](ClO4)2, lies on a centre of symmetry. The distorted N4O2 octa­hedral coordination environment around the Zn atom is composed of two 1,3-bis­[5-(2-pyrid­yl)-2H-tetra­zol-2-yl]propane ligands (L1) and two water mol­ecules, coordinated in trans positions. The ligand acts as a typical bidentate chelating ligand through one of its 2-pyridyl-2H-tetra­zole units, forming a five-membered Zn—N—C—C—N metallacycle with a small N—Zn—N bite angle [77.40 (8)°]. The other 2-pyridyl-2H-tetra­zole unit remains uncoordinated. The average Zn—N distance (2.156 Å) is somewhat longer than the distance between the ZnII center and the aqua ligand [2.108 (2) Å]. The coordinated pyrid­yl-tetra­zoyl rings are quasi-coplanar, making a dihedral angle of 1.9 (2)°, while the uncoordinated rings show a larger inter­planar angle of 21.3 (2)°. The flexible propane spacer displays a zigzag chain. Inter­molecular O—H⋯N and O—H⋯O inter­actions result in two-dimensional polymeric structures parallel to (100). Two C atoms of the spacer are disordered over two positions, with site occupancy factors of ca 0.85 and 0.15.

Structural characterization of two benzene-1,2-diamine complexes of zinc chloride: a molecular compound and a co-crystal salt

“…The Zn II ion sits on a crystallographically imposed center of symmetry and has a tetragonally distorted octahedral coordination geometry. The observed Zn-O bond length (Table 3) is significantly longer than the average of the values [2.14 (3) Å ] reported for similar trans aqua zinc(II) complexes (Necefoglu et al, 2001;İbrahim et al, 2006;Karimnejad et al, 2011;Gallardo et al, 2008; and the range [2.008 (3) to 2.147 (3) Å ] found in the hexaaquazinc(II) cation (Lian et al, 2009). However, it is close to the 2.2057 (16) Å found in the similar cation of trans-diaquabis(cyclohexane-1,2-diamine)zinc dichloride (Karimnejad et al, 2011).…”

2-tert-Butyl-5-(2-pyridyl)-2H-tetrazole as a chelating ligand in the direct synthesis of novel Cu(ii) and heterobimetallic Cu(ii)/Mn(ii) complexes

“…[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] Coordination properties of analogous N-substituted derivatives have been investigated to a lesser extent. Only a few complexes with 1-and 2-substituted 5-(2-pyridyl)tetrazoles (Scheme 1, B and C) have been structurally characterized until now, [17][18][19][20][21][22][23] and some spectroscopic assumptions concerning the structures of such complexes have been made. 24,25 More intensive investigations in this area are retarded by the absence of convenient methods for synthesis of such tetrazole ligands.…”