APPLICATION OF MICROWAVE DIELECTRIC LOSS HEATING EFFECTS FOR THE RAPID AND CONVENIENT SYNTHESIS OF RUTHENIUM(II) POLYPYRIDINE COMPLEXES

The complexes [Ru(LL)3](PF6)2 [LL = 2,2'-bipyridine (bipy), 1, 10-phenanthroline (phen) and 4,4'-di-tertbutyl-2,2'-bipyridine (bipy*)] and [Ru(terpy)2](PF6)2 (terpy = 2,2',2"-terpyridine) have been rapidly and conveniently synthesised using microwave dielectric loss heating effects. The compounds were prepared in good yields (60-94%) in a Teflon autoclave, which can sustain temperatures up to 250-degrees-C and pressures of 80 atm, using MeOH as a solvent. Two 20s exposures to microwaves (2450 MHz and 650 W) were sufficient to achieve these yields.