Dichlorobis(pyridine)zinc(II) – a redetermination

Structure of 1% copper(II)-doped dichlorobis(1,2-dimethylimidazole)zinc(II)

“…Pseudo twofold axes parallel to c* bisect the N--Zn--N and CI--Zn--C1 angles of each molecule. Both the Zn--N and Zn--C1 distances are equivalent within _+0.01 A to those reported for [Zn(imidazole) [Zno.99Cuo.ol C12(CsHsN2)2] [ZnL2C12] systems [100.6 (2) to 109.0 (4) °] where L is pyridine (Steffen & Palenik, 1976), 4-substituted pyridine (Steffen & Palenik, 1977;Lynton & Sears, 1971) or 3,5-dimethylpyrazole (Bouwman, Driessen, de Graaff & Reedijk, 1984). For the pyridine complexes the Zn--N distances are significantly longer [2-040 (5)-2.069 (6)A] than those in the imidazole complexes while the Zn---C1 distances are significantly shorter [2-204 (2)-2.228 (2)A].…”

2,5‐Diphenyl‐3,4‐bis(2‐pyridyl)cyclopenta‐2,4‐dien‐1‐one as a Redox‐Active Chelating Ligand

“…For MX 2 = ZnCl 2 , the two structures are similar, with pseudotetrahedral zinc coordination. However, the N-Zn-N angle is 106.3(2)8 in the unchelated complex, [11] whereas it is only 95.42(5)8 in the chelate [(1)ZnCl 2 ]. This is [11] in which repulsive interactions between the two chlorine atoms prevent a closer approach.…”

N-H(N)…S Bonding in Tetrahedral [Zn(NCS)2L]0 Complexes (L = MexH2-xN(CH2)2NH2-yMey, x, y = 0 - 2)

“…[5]. The last-named refinement (from MoKα, data in P2 1 /c) is of good quality and we would not have published our own result (from 12 kW CuKα data in P2 1 / a) had a number of discrepancies not seemed to warrant inclusion in this paper.…”

“…The discrepancies are mostly in the cell dimensions; absorption corrections were applied in our refinement and there may be a slight improvement over ref. [5]. Since reporting our result is mainly for the record, we refrain here from a detailed comparison of the two refinements.…”