J. R. Pioquinto-Mendoza, D. Martínez-Otero, Noemí Andrade-López
Feb 13, 2013
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0
Influential Citations
18
Citations
Journal
Polyhedron
Abstract
Abstract Synthesis and structural characterization of cis -dichlorocomplexes derived from 2-pyridylmethyl- N -methylimine ( 1 ), 2-pyridylmethyl- N -ethylimine ( 2 ), and 2-pyridylmethyl- N -(2-bromophenyl)imine ( 3 ) of general formula [M II {(C 5 H 4 N)–C(H) NR} n Cl 2 ] {M = Ni, Pd, Pt; R = Me, Et, –(2-Br–C 6 H 4 ); n = 1, 2} are described. Paramagnetic complexes of Ni II ( 1a – 3a ) were identified by elemental analyses, vibrational spectroscopy and for 2a and 3a , by electronic spectroscopy; the complexes of Pd II ( 1b – 3b ) and Pt II ( 1c – 3c ) were characterized by elemental analyses, vibrational spectroscopy and NMR. X-ray molecular structures of 1a , 2a , 1b – 3b , 2c and 3c displayed a bidentate coordination mode of the N -substituted pyridylimines ( 1 – 3 ) towards the metallic atoms with the formation of five-membered chelate rings and the chlorine atoms in a cis coordination. In 1a and 2a a distorted octahedral local geometry around the nickel atom was observed, whereas a distorted square planar local geometry around the palladium and platinum atoms in the compounds 1b – 3b , 2c and 3c was displayed.