in diethyl ether byproducts: H2, KCl; under inert atm. soln. K(H2BC8H14) in Et2O was added dropwise to soln. TiCl4 in Et2O (5:1) and stirred at room temp. for 12 h; soln. was filtered and evapd. in vacuo, residue was dissolved in ether and kept at -30°C; elem. anal.;

in hexane N2, a soln. of Ti comp. added to a suspn. of B compd., stirred for 2 d; filtered, concd., stored at -30°C for several d; elem. anal.;

in tetrahydrofuran byproducts: H2, KCl; under inert atm. soln. K(H2BC8H14) in THF was added dropwise to soln. TiCl4 in THF (1:1) and stirred at room temp. for 12 h; soln. was filtered and evapd. in vacuo, residue was dissolved in ether and kept at -30°C; elem. anal.;

in diethyl ether byproducts: H2, KCl; under inert atm. soln. K(H2BC8H14) in Et2O was added dropwise to soln. TiCl4 in Et2O (1:1) and stirred at room temp. for 12 h; soln. was filtered and evapd. in vacuo, residue was dissolved in ether and kept at -30°C; elem. anal.;