RUTHENIUM COMPOUNDS CONTAINING PYRIDYLTRIAZINES WITH LOW-LYING PI-STAR-ORBITALS

A number of ruthenium compounds with 5,6-dimethyl-3-(pyridin-2-yl)-1,2,4-triazine (dmpt), 5,6-diphenyl-3-(pyridin-2-yl)-1,2,4-triazine (dppt), and 3,5,6-tris(pyridin-2-yl)-1,2,4-triazine (tpt) have been prepared. The structures of the complexes have been characterized by using H NMR spectroscopy. The two isolated geometrical isomers of [Ru(dmpt)3]2+ have slightly different electronic properties. The emission, resonanee Raman, and electrochemical data show that the LUMO (lowest unoccupied molecular orbital) of all complexes has pyridyltriazine character. A correlation between the electrochemical and absorption/ emission data has been observed. © 1990, American Chemical Society. All rights reserved.