Recent Studies on the Formation and Properties of Quinhydrone Complexes

Several aspects of the strusctural and solid state chemistry of quicnhydrones are described. Among the topics discussed are the preparation of isomeric quicnhydrones, involving a solid state synthesis by grinding the components together, mothods of interconversion of isomeric quinhydrones, and the use of spectroscopic methods including 13C nmr to follow the interconversion. The important features of the crystal structures of several key complexes of quinones and hydroquinones are also descsribed. Some rationalizations for the differences in ease of formation and in stoichiometry of complexes involving methyl substitutents are also presentes.