Preparation and stoichiometric and catalytic reactivity of hydrido organometallic ruthenium complexes. X-ray crystal structure of [RuH(.eta.5-C8H11)2]BF4

Protonation of Ru(η 4 -C 8 H 12 ) (η 6 -C 8 H 10 ) by HBF 4 •Et 2 O at −80 o C initially produces [RuH(η 4 -C 8 H 12 )(η 6 -C 8 H 10 )] BF 4 (1). Complex 1 isomerizes in solution to [RuH(η 5 -C 8 H 11 ) 2 ] BF 4 (2). Complex 2 reacts with acetone to give an equilibrium mixture of 2 and [Ru(η 5 -C 8 H 11 )(η 4 -C 8 H 12 )-(acetone)] BF 4 (3). The reaction of 1 with S (S=MeCN, H 2 O) produces [Ru(η 5 -C 8 H 11 )S 3 ] BF 4 (5 and 4, respectively), while with C 5 Me 5 H the complex [Ru(η 5 -C 5 Me 5 )(C 8 H 12 )] BF 4 is formed. 1 also reacts with PMePh 2 to yield [Ru(η 5 -C 8 H 11 )(PMePh 2 ) 3 ] BF 4 (6) and with C 6 Me 6 to yield [Ru(η 5 -C 8 H 11 )(η 6 -C 6 Me 6 )] BF 4 (10). Complex 1 or its derivatives are catalysts for 1-alkene isomerization, ethylene dimerization, and ring-opening polymerization of norbornene