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Australian Journal of Chemistry Australian Journal of Chemistry Society
An international journal for chemical science
RESEARCH ARTICLE

The Chemistry of Quinones. II. Synthesis of Polysubstituted Naphthoquinones

JR Hall, RG Cooke, NK Marchant, WR Owen and RA Plowman

Australian Journal of Chemistry 15(3) 480 - 485
Published: 1962

Abstract

Solutions of copper(II) salts and excess 2,9-dimethyl-1,10-phenanthroline (dmp) in organic solvents yielded complexes of formula Cu(dmp),X,.H,O, where X=NO3, Cl, and Br. When excess of the copper(II) salt was present, mono complexes represented by CudmpX2, where X=NO3, Cl, Br ; 2X=SO4 were obtained. Copper(II) perchlorate-dmp mixtures yielded hydrated Cu(dmp),(ClO4)2. Aqueous solutions of the bis complexes changed colour when boiled and deposited red crystals of composition Cu(dmp)2X, with water of crystallization in some cases. Bis(dmp)copper(I) nitrate, perchlorate, and sulphate were also produced by reduction of the copper(II) complexes with hypophosphorus acid or hydroxylamine salts. The visible absorption curves for solutions of the complexes Cu(dmp)2X, corresponded with those reported in studies of the spectrophotometric estimation of copper using dmp. Mono complexes of formula CudmpX, where X=Cl, Br, and I, were prepared by reduction of the corresponding copper(II) complexes.

https://doi.org/10.1071/CH9620480

© CSIRO 1962

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