Ni(II) and Cu(II) schiff base complexes with an extended H-bond network

Abstract

Reaction of the hydroxy-rich Schiff base Hsaladhp = Ph(OH)CHNC(CH 3)(CH 2OH) 2 with CuCl 2·4H 2O or NiCl 2·4H 2O. gave mononuclear complexes CuCl[Ph(O)CHNC(CH 4)(CH 2OH) 2]·H 2O ( 1). Ni[Ph(O)CHNC(CH 3)(CH 2OH) 2] 2 ( 2) and Ni[Ph(O)CHNC(CH 3)(CH 2OH) 2] 2·(C 5H 5N)·2H 2O ( 3). The complexes were characterized by spectroscopic methods and by single crystal X-ray structure determination. 1 crystallizes in the orthorhombic space group Pcab, with a = 10.638(1), b = 27.584(2), c = 8.818(1) A ̊ and D cale = 1.665 g cm −3 for Z = 8; 2 crystallizes in the triclinic space group P 1 , with a = 14.637(2), b = 10.912(1), c = 8.794(1) A ̊ , α = 74.444(3), β = 112.579(3), γ = 87.138(3)° and D cale = 1.393 g cm fro Z = 2: 3 crystallizes in the monoclinic space group P2 1/ c, with a = 10.166(1), b = 12.65(1), c = 25.960(2), β = 97.232(3)° and D cale = 1.342 g cm for Z =4. The EPR spectra of compound 1 in the solid state give features characteristics for the presence of an S = 1 triplet state due to the presence of the extended H-bond network.