iron(III) chloride; iron(II) chloride in tetrahydrofuran B5H9 was condensed in vac. onto NaH at -196°C in THF, mixt. was warmed to -78°C, NaB5H8 in THF was filtered in vac. onto FeCl2, cooled to -196°C, then warmed to -78°C, stirred 1-2 h, FeCl3 was added, mixt. was stirred for 4 h; solvent was removed under vac., mixt. was allowed to warm to room temp., residue was extd. with hexane under N2, solvent was removed by evapn. under vac., evacuated at -78°C, compounds were obtained by vac. sublimation/distillation;

in tetrahydrofuran B5H9 was condensed in vac. onto NaH at -196°C in THF, mixt. was warmed to -78°C, NaB5H8 in THF was filtered in vac. onto RuCl3 at-78°C, stirred 3 h, warmed to room temp., stirred for 30 min; solvent was removed under vac., residue was extd. with hexane in air, evapd., ppt. was obtained by sublimation;

KH in tetrahydrofuran byproducts: H2; borane and THF condensing onto KH and Bu4NI under N2 at -196°C, warming to room temp., stirring for 15 h, THF removing, BBr3 condensing onto the residue at -196°C , warming to room temp., stirring for 6 h; isolated by sublimation; identified by NMR spectrum;

NaH in tetrahydrofuran byproducts: H2; borane and THF condensing onto KH and Bu4NI under N2 at -196°C, warming to room temp., stirring for 15-18 h, THF removing, BBr3 condensing onto the residue at -196°C , warming to room temp., stirring for 6 h; isolated by sublimation; identified by NMR spectrum;

NaH in tetrahydrofuran byproducts: H2, NaCl; borane and THF condensing onto NaH and Me4NCl under N2 at -196°C, warming to room temp., stirring for 12 h, THF removing, BCl3 condensing onto the residue at -196°C , warming to room temp., stirring for 6 h; isolated by sublimation; identified by NMR spectrum;

in neat (no solvent) catalyst Ru/C (5percent; 0.51mmol), Re2(CO)10 (4.22mmol), B5H9 (25mmol), H2 (pressure about 100atm), single-ended stainless-steel cylinder of seamless one-piece construction, equipped with a stainless-steel needle valve; 120-125°C, 14d;; distn. of volatile contents of cylinder into the vacuum line (48h), distn. of B5H9 into a -196°C U-trap; the -35°C U-trap contains a mixture of B10H14, 2-((CO)5Re)B5H8 and (CO)3ReB5H8; condensation of (CO)3ReB5H8 into a -10°C trap;;

Electric Arc; 15 kV;

in gaseous matrix diluted H2, fast gas stream, tube at 460-525°C;

in gas flow system in which B5H9 vapor, acetylene, and hydrogen carrier gas are heated at 500°C for about one second;;

Electric Arc; 15 kV;