2-(2'-THIENYL)PYRIDINE VERSUS 2,2'-BIPYRIDYL BINDING MODE IN COPPER(II) COMPLEXES

被引:13
作者
AMARI, C [1 ]
IANELLI, S [1 ]
PELIZZI, C [1 ]
PELIZZI, G [1 ]
PREDIERI, G [1 ]
机构
[1] UNIV PARMA,CTR STUDIO STRUTTURIST DIFFRATTOMETR,CNR,IST CHIM GEN & INORGAN,I-43100 PARMA,ITALY
关键词
D O I
10.1016/S0020-1693(00)82848-0
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
2-(2'-Thienyl)pyridine (pyth) and its acetylated derivative (apyth) (III) react with copper chloride to give compounds of formulae [Cu(pyth)2Cl2] (I) and [Cu(apyth)2Cl2] (H). The crystal structures of I, II and III have been determined by X-ray methods. In both cop er complexes the metal atom is surrounded by two N atoms (Cu-N, 2.025(5) angstrom in I and 2.021(2) angstrom in H) from two ligands molecules and two Cl atoms (2.265(2) angstrom in I and 2.264(1) angstrom in II) in a typical square planar environment. Two thiophene S atoms (Cu-S, 2.968(2) angstrom in I and 2.904(1) angstrom in II) complete the coordination sphere, making the complex elongated octahedral. By contrast, in all complexes of general formula [Cu(bipy)2X]X, (bipy=2,2'-bipyridyl) the coordination environment around copper is quasi-trigonal bipyramidal, the pyridine rings in each bidentate ligand being almost coplanar, and one anion does not participate to coordinative bonding.
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页码:89 / 94
页数:6
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