nonacarbonyltris(triphenylphosphine)triruthenium in toluene Reaction mixture is heated in an oil bath at 140°C for 10 min., frozen at -196°C and degassed, and heated at 140°C for 24 h.; vacuum fractionation through a -23, -95, -196°C trap series stopped Me2Et2C4B4H4 (-23°C) and butene (-196°C); GLC;

tri-ruthenium(0)dodecacarbonyl in toluene Reaction mixture is heated in an oil bath at 140°C for 10 min., frozen at -196°C and degassed, and heated at 140°C for 24 h.; vacuum fractionation of volatile materials through a -23°C trap stopped Me2Et2C4B4H4 : MeCHCMe-2,3-Et2C2B4H5 (70percent : 30percent), a -95°C trap stopped butene; NMR, GLC;