438000-80-7Relevant academic research and scientific papers
Doubly cyclopalladated pyridazines: Chiral liquid crystals
Slater, Jonathan W,Lydon, Donocadh P,Rourke, Jonathan P
, p. 246 - 255 (2002)
The mono and dicyclopalladation of new mesogenic pyridazines and subsequent reaction with β-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 exhinited by both the derivatives with transition temperatures in the region of 100-300 °C.
Doubly cyclometalated pyridazines: Contrasting behavior with palladium and platinum
Slater, Jonathan W.,Lydon, Donocadh P.,Alcock, Nathaniel W.,Rourke, Jonathan P.
, p. 4418 - 4423 (2008/10/08)
The cyclometalation of 3,6-diphenylpyridazines with palladium and platinum has been studied. When palladium acetate is used as the metal source, two sequential cyclometalations are observed, with the first cyclometalation deactivating the system toward a second cyclometalation. Both monocyclopalladated and dicyclopalladated species have been isolated and characterized as their acetylacetonate derivatives. When potassium tetrachloroplatinate is used as the metal source, only double cycloplatination is observed: the first cycloplatination activates the system toward a second cycloplatination through a combination of nitrogen coordination and a chloride bridging two platinums. A doubly cycloplatinated compound has been isolated as its triphenylphosphine derivative, which has been fully characterized: the single-crystal X-ray structure shows that the two platinums are bridged by a chloride.
