F Diborane

Di[bis(trifluoromethyl)phosphido]mercury, 1371 f Diborane(6), 0166a Diboron oxide, 0169 Diboron tetrachloride, 0161 Diboron tetrafluoride, 0162 Dibromine pentoxide, 0276 Dibromine trioxide, see Bromine bromate, 0275 Dibromoacetylene, 0579... 

Which of the following species will not have permanent dipole moments (a) Hydrogen cyanide, HCN (b) Carbonyl sulfide, OCS (c) Phosphorus pentachloride, PCI5 (d) Trimethylamine, N(CH3)3 (e) Boron trifluoride, BF3 (f) Diborane, which has the following structure ... 

R. F. Muraca, J. Neff, and J. S. Whittick, Physical Properties ofEiquid Oyygen D fluoride and Eiquid Diborane—M Critical Review, Report No. NASA-CR-88519, SRI-951581-4, Jet Propulsion Lab., Calif. Inst, of Tech., Pasadena, Stanford Research Inst., Menlo Park, Calif., July 1967. 

The sodium borohydride solution is added dropwise to the stirred boron trifluoride etherate-diglyme solution resulting in the formation of diborane. The gas is swept into the olefin-TH F solution (held at 20°) by maintaining a slow flow of dry nitrogen through the generator. 

F) 9 g of the diketo-pyrazino-morphanthridine compound obtained above are reduced with diborane to give mianserin. 

Analog erhalt man mit Diboran aus 2-Oxo-l,4-diphenyl-azetidin3-Am7mo-5-/ /teny/-propanol2 (53,8% d.Th. F 88,5-89,5°). 

Hydrochinon Zu einer Losung von 8,3 mMol Diboran (16,6 mMol Boran bzw. 50 mMol Hydrid-Aquiv.) in 45 ml abs. THF werden unter Riihren bei 0° unter Stickstoff 1,351 g (12,5 mMol) Chinongegeben. In 48 Stdn. werden unter Wasserstoff-Entwicklung 2 Hydrid-Aquiv. verbraucht. Mari hydrolysiert durch Zugabe von Wasser, versetzt mehrmals mit Methanol, dampft wiederholt zur Entfernung der Borsaure ein, saugt das Pro-dukt ab und kristallisiert aus Wasser um Ausbeute 1,12 g (82% d.Th.) F 170-171°. 

Like synthetic diamond, C-BN is normally obtained by high-pressure processing. Efforts to synthesize it by CVD at low pressure are promising. It is deposited in an electron-cyclotron-resonance (ECR) plasma from a mixture of BF3 and either ammonia or nitrogen at 675°C on an experimental basis.F l Like CVD diamond, it is also deposited by the hot-filament method using diborane and ammonia diluted with hydrogen at 800°C.P 1... 

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