TY - JOUR
T1 - Steric influence of the 6-methyl group on the molecular and crystal structures of copper(II) chloride complexes with 2-(N-acetylamino)-6- methylpyridine
AU - Smolentsev, Anton I.
AU - Lider, Elisaveta V.
AU - Lavrenova, Ludmila G.
AU - Sheludyakova, Liliya A.
AU - Bogomyakov, Artem S.
AU - Vasilevsky, Sergei F.
PY - 2014/7/27
Y1 - 2014/7/27
N2 - New coordination compounds of copper(II) chloride with 2-(N-acetylamino)-6- methylpyridine (L) of the compositions [Cu2L2Cl 4] (1), [CuL(H2O)Cl2]·L (1a), and [CuL2Cl][CuLCl3]·C2H5OH (2) have been prepared by the reactions between ethanol solutions of L and ethanol solutions of CuCl2·2H2O at different Cu:L ratios. The compounds have been characterized by a set of methods including elemental analysis, IR-spectroscopy, single-crystal X-ray diffraction analysis, and magnetic susceptibility measurements in the range 5-300 K (for 1). The crystal structures of 1 and 1a revealed distorted square-pyramidal geometry around Cu(II) centers, while in 2 both distorted square-pyramidal and trigonal-bipyramidal coordinations are present. L acts as a bidentate chelate ligand bound to the metal center through the pyridine N atom and the acetyl O atom. The results of the study demonstrate that the presence of 6-methyl substituent in L provides a high steric hindrance, precluding the formation of complexes with a distorted octahedral coordination of Cu(II).
AB - New coordination compounds of copper(II) chloride with 2-(N-acetylamino)-6- methylpyridine (L) of the compositions [Cu2L2Cl 4] (1), [CuL(H2O)Cl2]·L (1a), and [CuL2Cl][CuLCl3]·C2H5OH (2) have been prepared by the reactions between ethanol solutions of L and ethanol solutions of CuCl2·2H2O at different Cu:L ratios. The compounds have been characterized by a set of methods including elemental analysis, IR-spectroscopy, single-crystal X-ray diffraction analysis, and magnetic susceptibility measurements in the range 5-300 K (for 1). The crystal structures of 1 and 1a revealed distorted square-pyramidal geometry around Cu(II) centers, while in 2 both distorted square-pyramidal and trigonal-bipyramidal coordinations are present. L acts as a bidentate chelate ligand bound to the metal center through the pyridine N atom and the acetyl O atom. The results of the study demonstrate that the presence of 6-methyl substituent in L provides a high steric hindrance, precluding the formation of complexes with a distorted octahedral coordination of Cu(II).
KW - 2-(N-acetylamino)-6-methylpyridine
KW - Copper(II) complexes
KW - Crystal structure
KW - Steric effect
KW - Synthesis
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U2 - 10.1016/j.poly.2014.04.016
DO - 10.1016/j.poly.2014.04.016
M3 - Article
AN - SCOPUS:84899807403
VL - 77
SP - 81
EP - 88
JO - Polyhedron
JF - Polyhedron
SN - 0277-5387
ER -