Crystal structure of a ternary mononuclear copper (II) complex: 4‐chloro‐3‐methyl‐6[(N‐2‐picolyl)‐1′‐iminomethyl]phenolato copper(II)perchlorate

The complex crystallizes in monoclinic space group P2₁/n with unit cell parameters a = 7.295(4), b = 19.627(5), c = 12.770(4) Å, β = 101.25(4)º, V = 1793.2(12) ų, Z = 4, ρ = 1.684 Mg/m³ at T = 293(2)K. The structure was solved by Patterson method and refined by full‐matrix least‐squares procedures to final R = 0.0387 using 2906 observed reflections. The asymmetric unit of the complex contains a mononuclear tridentate ligand, a perchlorate group and a methanol molecule. The compound crystallizes as parallel layers of polymeric complex bridged through perchloarate groups. The molecular CuN₂OO′O′′₂ chromophore involves an elongated rhombic octahedral structure and the Cu‐ligand bond shows greater disparity. The five‐membered chelate ring and the pyridine ring lie in the same plane while the six membered chelate ring assumes sofa conformation. A strong O‐H…O inter molecular interaction plays a key role in the formation of dimer along b‐axis. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)