Ma. Khalifa et Ama. Hassaan, BIS-ADDUCTS FORMED BY NICKEL(II) AND ZINC(II) CHELATES OF PYRIDINE-2-(1H)THIONES WITH NITROGEN DONORS, Transition metal chemistry, 19(1), 1994, pp. 28-30
The bis-adducts formed by nickel(II) and zinc(II) chelates of 3-cyano-
4-aryl-6-phenyl pyridine-2-(1H)thiones with pyridine and N-methylimida
zole have been prepared and characterized by microelemental analyses,
i.r., u.v., vis., and H-1 n.m.r. spectra and magnetic measurements. Ow
ing to Lewis acid-base interactions, the diamagnetic square planar nic
kel(II) or zinc(II) chelates interact with two molecules of pyridine o
r N-methylimidazole in the two axial positions forming the correspondi
ng octahedral bis-adducts.