in decalin byproducts: HBr; to a soln. of dibromomethylborane H2(17/18)O was added dropwise at 0°C with stirring and HBr driven out by a flow of Ar; the soln. was then refluxed for 1 h;; rectification; (11)B-NMR;;

in dichloromethane compd. prepd. by react. VO(On-Bu)3 with ligand in CH2Cl2; H2(17)O added to soln.; detn. by NMR;

in neat (no solvent, gas phase) byproducts: Xe, HF; at 50°C for 3 h; fractional distn. at low temp.;

in neat (no solvent) Electrochem. Process; in the course of electrolysis;

heated (1000°C); recrystn. (900°C, 35 kbar, 24 h);