Bis(8-hydroxyquinolinato)platinum 7,7,8,8-tetracyanoquinodimethane, Pt(QNL) 2·TCNQ. Synthesis, structure and spectroscopic properties

Abstract

The title complex, Pt(QNL) 2·TCNQ, was prepared by the reaction of Pt(QNL) 2 with TCNQ in acetonitrile. This complex consists of stacks of alternating, parallel Pt(QNL) 2 and TCNQ molecules. The molecules of Pt(QNL) 2 and TCNQ in the stack are planar and nearly parallel. The angle between the mean plane defined by the phenyl ring in TCNQ and the mean plane defined by the atoms Pt, O 1, O′ 1, N 1 and N′ 1 is 3.57°. The Pt(QNL) 2·TCNQ is diamagnetic. The visible spectrum exhibits a charge transfer band at 10 100 cm −1 indicating that there is some charge- transfer interaction in the complex. Spectroscopic data and the analysis of the bond distances in the TCNQ moiety indicates that the degree of charge- transfer in Pt(QNL) 2·TCNQ is small.