Reactivity of Indene, Fluorene, Azulene, and Acenaphthylene with a Basal-Edge-Bridged Square-Pyramidal Hexaruthenium Dihydride

Abstract

The basal-edge-bridged square-pyramidal hexanuclear cluster [Ru6(I3-H)2(I5- 2 -ampy)(I-CO)2(CO)14] (1 ;H 2ampy ) 2-amino-6-methylpyridine) reacts with indene in refluxing chlorobenzene to give [Ru7(I3-H)(I5- 2 -ampy)(I- 9 -C9H7)(I-CO)3(CO)11 ]( 2), [Ru6(I3-H)(I5- 2 -ampy)( 5 -C9H7)(I3-CO)(I-CO)2(CO)11 ]( 3), and the known dimer [Ru2( 5 -C9H7)2(I-CO)2(CO)2]. While the indenyl ligand of complex 2 is 5 : 6 edge bridging, complex 3 has a terminal 5 -indenyl ligand. The hexanuclear 6 -fluorene derivative [Ru6(I3-H)2(I5- 2 -ampy)( 6 -C13H10)(I-CO)2(CO)11 ]( 4) has been isolated from a reaction of compound 1 with fluorene in decane at reflux temperature. Under analogous conditions, azulene reacts with 1 to give [Ru6(I5- 2 -ampy)(I3- 10 -C10H8)(I-CO)2(CO)10 ]( 5) and [Ru4(I3- 10 -C10H8)(CO)9 ]( 6). In both complexes, the azulene ligand is attached to three Ru atoms through its ten C atoms. Four complexes have been isolated from reactions of acenaphthylene with complex 1 in refluxing decane: [Ru4(I4- 2 ampy)(I- 6 -C12H8)(I- 4 -C12H8)(I-CO)2(CO)5 ]( 7), [Ru6(I4- 2 -ampy)(I3- 10 -C12H8)(CO)12 ]( 8), [Ru7(I52 -ampy)(I 412 -C