Synthesis of indenyl ruthenium triazolato complexes by [3+2] cycloaddition of activated nitrile and alkynes to indenyl ruthenium azido complexes:: crystal structures of [(η5-C9H7)Ru(PMe2Ph)2{N3C2(CO2Me)2}] and [(η5-C9H7)Ru(dppe){N3C2H(CN)}]

The indenyl ruthenium( II) azide complexes [( eta(5)- C9H7) Ru( L-2) N-3], L-2 = ( PMe2Ph)(2) (1), dppe (2) and dppm (3), ( where dppe Ph2PCH2CH2PPh2 and dppm PPh2CH2PPh2) were readily prepared by the reaction of NaN3 with corresponding chloro complexes [(eta(5)- C9H7) Ru( L-2) Cl]. The azido complexes undergo [ 3 + 2] dipolar cycloaddition reactions with activated alkynes and nitrile ( NCCH = CHCN) to yield new indenyl ruthenium triazolato complexes [(eta(5)- C9H7) Ru(L-2)(N3C2(CO2R)(2))], L-2 = ( PMe2Ph)(2), R= Me (4), Et (5); L-2 = dppe, R= Et (6), L-2 dppm, R= Et (7) and [( eta(5)- C9H7) Ru(L-2)(N3C2HCN)], L-2 = ( PMe2Ph)(2) (8), L-2 dppe (9), L2 = dppm ( 10). The complexes were fully characterized on the basis of microanalyses, IR and NMR spectroscopy. The structures of representative complexes 4 and 9 have been determined by single-crystal X-ray methods.