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Copper Complexes with New Pyridylpyrazole Based Ligands
Author(s) -
Campo José A.,
Cano Mercedes,
Heras José V.,
Lagunas M. Cristina,
Perles Josefina,
Pinilla Elena,
Torres M. Rosario
Publication year - 2002
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/1522-2675(200204)85:4<1079::aid-hlca1079>3.0.co;2-g
Subject(s) - chemistry , tetragonal crystal system , copper , octahedron , crystallography , pyrazole , crystal structure , tetrahedron , ligand (biochemistry) , metal , stereochemistry , organic chemistry , receptor , biochemistry
We report the synthesis, characterization, and crystal structures of new ligands of the pyridinylpyrazole type, i.e. , 3,5‐bis(4‐butoxyphenyl)‐1‐(pyridin‐2‐yl)‐1 H ‐pyrazole ( L 1 ) and 3,5‐bis(4‐phenoxyphenyl)‐1‐(pyridin‐2‐yl)‐1 H ‐pyrazole ( L 2 ) ( Scheme 1 ), and the study of their coordination behavior towards Cu I and Cu II . The versatility of this type of ligand, which can give access to different coordination spheres about the metal center, depending on the nature of the copper starting material used in the preparation of the complexes ( Scheme 2 ), is illustrated. Thus, pseudo‐tetrahedral Cu I as well as six‐coordinated tetragonal and distorted tetragonal pyramidal Cu II derivatives were obtained for [Cu(L) 2 ]PF 6 , [Cu(Cl) 2 (L) 2 ] (L= L 1 , L 2 ), and [Cu(Cl)( L 1 ) 2 ]PF 6 , respectively. We also present a crystallographic support of a distorted octahedral cis‐ bis(tetrafluoroborato‐ κF )copper(II) compound found for [Cu(BF 4 ) 2 ( L 1 ) 2 ] ( 3 ).