TY - JOUR
T1 - Copper(II), nickel(II) and cobalt(II) complexes with N,N′-bis(2-N,N-dimethylaminoethyl)pyridine-2,6-dicarboxamide 1-oxide. Binucleating behaviour by a deprotonated pyridine N-oxide ligand
AU - Antolovich, Michael
AU - Fitzpatrick, Lynette J.
AU - Phillips, David J.
PY - 2000/12/1
Y1 - 2000/12/1
N2 - New copper'(II), nickel(II), and cobalt(II) complexes are described with the potentially binucleating pyridine N-oxide ligand N,N′-bis(2-N,N′-dimethylaminoethyl)pyridine-2,6-dicarboxamide 1-oxide (medpco). Electronic spectra and X-ray powder diffraction measurements indicate that metal complexes of the type M(medpco)Hal2(H2O)x (Hal = Cl, Br) are five-coordinate. Monomeric structures are proposed with ONN-bonded ligand and coordinated halide. This is analogous to the coordination to one of the coppers in the previously reported X-ray structure of Cu2(medpco)Cl4. Complexes of the type M′2(medpco-2H)Hal2(H2O)x (M′ = Ni,Co), involving deprotonated ligand, are reported. These appear to have N-oxide-bridged structures, involving binucleating ligand, analogous to the previously reported X-ray structure of Cu2(medpco-2H)Cl2. Variable temperature magnetic data for the complexes are discussed.
AB - New copper'(II), nickel(II), and cobalt(II) complexes are described with the potentially binucleating pyridine N-oxide ligand N,N′-bis(2-N,N′-dimethylaminoethyl)pyridine-2,6-dicarboxamide 1-oxide (medpco). Electronic spectra and X-ray powder diffraction measurements indicate that metal complexes of the type M(medpco)Hal2(H2O)x (Hal = Cl, Br) are five-coordinate. Monomeric structures are proposed with ONN-bonded ligand and coordinated halide. This is analogous to the coordination to one of the coppers in the previously reported X-ray structure of Cu2(medpco)Cl4. Complexes of the type M′2(medpco-2H)Hal2(H2O)x (M′ = Ni,Co), involving deprotonated ligand, are reported. These appear to have N-oxide-bridged structures, involving binucleating ligand, analogous to the previously reported X-ray structure of Cu2(medpco-2H)Cl2. Variable temperature magnetic data for the complexes are discussed.
KW - Binucleating ligand
KW - Cobalt(II)
KW - N-oxide bridging
KW - Nickel(II)
KW - Pyridine N-oxide complexes
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U2 - 10.1080/00958970008054930
DO - 10.1080/00958970008054930
M3 - Article
AN - SCOPUS:8744308218
SN - 0095-8972
VL - 50
SP - 119
EP - 130
JO - Journal of Coordination Chemistry
JF - Journal of Coordination Chemistry
IS - 2
ER -