ISSN:
0009-2940
Keywords:
Copper(II) complexes, dinuclear
;
Schiff bases, macrocyclic
;
Redox properties
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Complexes with Macrocyclic Ligands, I. - Dinuclear Copper(II) Complexes with a Totally π-Conjugated Macrocycle of Schiff Base Type: Syntheses, Structures, Electro-, and Magnetochemical PropertiesThe dinuclear copper(II) complexes 6, 7, and 8 of three novel macrocyclic ligands were synthesized by the Schiff base condensation of 2 equiv. of 1,2-phenylenediamine and 2,6-diformylphenol in the presence of 2 equiv. of copper(II) perchlorate and were characterized by X-ray structure analyses, electrochemical investigations (DCV), and variable-temperature magnetic susceptibility measurements. Complex 6 exists in two different solvated crystalline forms. The Copper(II) ions in all three complexes are octahedrally coordinated with long axial distances to solvent molecules or perchlorate ions. The copper ions in 6 (in solvate a) are only five-coordinate and square-pyramidal. The CuIICuII complexes were reduced in successive, quasi-reversible, one-electron steps. The antiferromagnetic exchange interactions were determined. Upon dissolution in acetonitrile complex 8 decomposed to form [Cu(MeCN)4]+ClO-4 and the benzimidazolium percholorate 9 (X-ray structure determination).
Additional Material:
9 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/cber.19941270304
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