Pyridyl azafluoranthene ligand (LH, 2) was prepared by a Diels- Alder cycloaddition reaction between 2-cyanopyridine and bis(4-tertbutylphenyl)- 8H-cyclopenta[l]acenaphthylen-8-one (1). Treatment of (2) with [PtCl2(dmso)2] ...