Abstract
The asymmetric imidazolium salt [Ru(dmbpy)2(bpip)](PF6)3 (bpip = 1-benzyl-3-isopropyl-1H-imidazo[4,5-f][1,10]phenanthrolinium) was prepared by a four-step synthetic route. The isotopomer labelled with 13C at the C2 position of bpip was prepared from 1,10-phenanthroline-5,6-diamine and triethyl orthoformate-(formyl-13C). Deprotonation at low temperatures in acetonitrile using KO t Bu and KHMDS were monitored by NMR to investigate the formation of the free N-heterocyclic carbene.
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