ISSN:
0009-2940
Keywords:
Tri-tert-butylazadiboriridine
;
(Hydroboryl)(methoxyboryl)amine
;
2,3-μ-Hydro-1,2,3-azoniadiborata-l-cyclopropenes
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The B—B bond of tri-tert-butylazadiboriridine [—NR—BR—BR—] (R = tBu; 1) is oxidized by MeOH to give the (hydroboryl)(methoxyboryl)amine H—BR=NR-BR(OMe) (2a). μ-2,3-Hydroazoniadiborata-1-cyclopropenes [=NR—BR(X)—μH—BR=] (3a, 3c-e) are formed by the action of the acids HX upon 1. A similar hydrogen bridge as in 3a-e is formed during the hydroboration of 1 by catecholborane, yielding 3f. A B atom is identified in the products 3a-f to be planarly coordinated by four atoms, two of which are forming a BHB three-center bond with that B atom. This is a novel bonding situation in boron chemistry. The structures of the products are deduced from 1H-, 11B-, and 13C-NMR spectra and are confirmed by X-ray structural analyses of 2a, 3a, and 3c.
Additional Material:
2 Tab.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/cber.19951280203
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