Boranes. XXVI. Preparation of boron and deuterium isotopically substituted n-nonaborane-15 and decaborane-14

Computational Studies of Nido-8-Vertex Boranes, Carboranes, Heteroboranes, and the Lewis Base Adduct nido-B8H10L

“…As mentioned previously, the polyborane B 8 H 12 has been structurally characterized via X-ray crystallography 3 and shown to display a ni-8〈VI〉 configuration with overall molecular C s symmetry (Figure b). However, in solution B 8 H 12 is fluxional and on the NMR time scale shows C 2 v symmetry (three resonances in the 11 B NMR spectrum in 4:2:2 ratios). This fluxional behavior in solution was considered to involve two equivalent C s symmetry structures.…”

Boranes. XXXII. Reactions of n-nonaborane(15)

“…The formation of B6Hi0 in hydrolysis of «-B9H46 is not surprising since it was shown above that «-B9H15 can undergo cleavage with suitable base to yield octaborane-(12) derivatives. Octaborane(12) has been shown to undergo nearly quantitative hydrolysis8 to hexaborane- (10).…”

Transition metal catalyzed exchange of deuterium gas with terminal boron-hydrogen bonds in carboranes, metallocarboranes, and other boron compounds

“…The UB nmr spectrum of the product of system 3 consisted of an unsymmetrical singlet for B (3,6) and B (4,5,7,11), and slightly collapsed doublets for B(8,10) and B(9,12). Under the more vigorous conditions of system 4, (PPh3)3RuHCl produced deuterated carborane with a nB nmr spectrum consisting of a sharp singlet for B (3,6) and B (4,5,7,11), a broad singlet for B(8,10), and a poorly resolved doublet for B(9,12). Systems 5 and 6 produced carboranes which were more than 95 % deuterated.…”