The mono and dicyclopalladation of new mesogenic pyridazines and subsequent reaction with beta-diketones yields some novel metallomesogens. The monometallated derivatives have a flat central core. In contrast. the dimetallated derivatives have a sterically induced twist in the molecule that renders them chiral. Smectic A phases are typically exhibited by both the derivatives with transition temperatures in the region of 100-300 degreesC. (C) 2002 Elsevier Science B.V. All rights reserved.
The mono and dicyclopalladation of new mesogenic pyridazines and subsequent reaction with beta-diketones yields some novel metallomesogens. The monometallated derivatives have a flat central core. In contrast. the dimetallated derivatives have a sterically induced twist in the molecule that renders them chiral. Smectic A phases are typically exhibited by both the derivatives with transition temperatures in the region of 100-300 degreesC. (C) 2002 Elsevier Science B.V. All rights reserved.