Chemistry and Physics Faculty Articles

Title

Complexes of the I,3-Bis(2-Arylimino) Benz (F) Isoindoline Ligand Including the Crystal Structure of the Cu(II)-Acetate Complex

Document Type

Article

Publication Date

1997

Publication Title

Journal of Coordination Chemistry

Keywords

Isoindoline ligand, BAII, Cu(II) complexes, Zn(II), N(II)

ISSN

0095-8972

Volume

42

Issue/No.

1-2

First Page

107

Last Page

126

Abstract

The new BA1I ligand l,3-bis(2-pyridylimino)benz(f) isoindoline, NBAII, has been synthesized and Zn(II), Ni(II) and Cu(II) complexes with the formula (NBAII)MX (where X = OAc− for Cu(II) and Ni(II) and X = Cl− for Pd(II)) have been prepared. The ligand and complexes have been characterized by 1H-NMR spectroscopy, infrared spectroscopy and electronic absorption spectroscopy. The NBAII ligand can accommodate both planar and distorted tetrahedral geometries in these cases. The quadruply-bonded complex (NBAII)Mo2(OAc)3 has also been prepared. It was found to exhibit an unusual bonding mode for the NBAII ligand. The molecular structure of the Cu(II) compound was determined by single crystal x-ray diffraction techniques: (NBAII)Cu(OAc) crystallizes in the centrosymmetric space group C2/m with a = 20.256(4) Å, b = 16.166(3) Å, c = 7.915(2) Å, α = 90°, β = 94.83(2) °, γ = 90°, V = 2583(1) Å and Z = 4. The structure of this complex is compared to that of (B AII)Cu(OAc) which has been used as a model for the copper containing enzyme galactose oxidase. The addition of the benzo portion to BAII to give NBAII apparently increases electron density on the Cu(II) ion, disfavoring coordination of water and favoring a coordination number of four.

Comments

91997 OPA (Overseas Publishers Association) Amsterdam B. V. Published in The Netherlands under license by Gordon and Breach Science Publishers

DOI

10.1080/00958979708045284

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Peer Reviewed

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