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Boron-boron multiple bonds are rare, but can be stabilized by NHC adducts. One example is the diborene (RHB=BHR): [20] [21] Each boron atom has an attached proton and is coordinated to a NHC carbene. The parent structure with the additional carbene ligands is diborane(2). [22] [23] A reported diboryne is based on similar chemistry. [24]
A small amount is used as a dopant in semiconductors, and reagent intermediates in the synthesis of organic fine chemicals. A few boron-containing organic pharmaceuticals are used or are in study. Natural boron is composed of two stable isotopes, one of which has a number of uses as a neutron-capturing agent.
Diborane(6), commonly known as diborane, is the chemical compound with the formula B 2 H 6.It is a highly toxic, colorless, and pyrophoric gas with a repulsively sweet odor. . Given its simple formula, borane is a fundamental boron compou
Tris(pentafluorophenyl)borane, sometimes referred to as "BCF", is the chemical compound (C 6 F 5) 3 B.It is a white, volatile solid. The molecule consists of three pentafluorophenyl groups attached in a "paddle-wheel" manner to a central boron atom; the BC 3 core is planar.
It is a useful reagent in organic synthesis, as a precursor to boronic acids, which are used in Suzuki couplings. These boronic acids are prepared via reaction of the trimethyl borate with Grignard reagents followed by hydrolysis:. [3] [4] ArMgBr + B(OCH 3) 3 → MgBrOCH 3 + ArB(OCH 3) 2 ArB(OCH 3) 2 + 2 H 2 O → ArB(OH) 2 + 2 HOCH 3
Decaborane is an effective reagent for the reductive amination of ketones and aldehydes. [7] Decaborane has been assessed for low energy ion implantation of boron in the manufacture of semiconductors. It has also been considered for plasma-assisted chemical vapor deposition for the manufacture of boron-containing thin films.
The most important boranes are diborane B 2 H 6 and two of its pyrolysis products, pentaborane B 5 H 9 and decaborane B 10 H 14. A large number of anionic boron hydrides are known, e.g. [B 12 H 12] 2−. The formal oxidation number in boranes is positive, and is based on the assumption that hydrogen is counted as −1 as in active metal ...
Borane(5) is the dihydrogen complex of borane. Its molecular formula is BH 5 or possibly BH 3 (η 2-H 2). [19] It is only stable at very low temperatures and its existence is confirmed in very low temperature. [20] [21] Borane(5) and methanium (CH 5 +) are isoelectronic. [22] Its conjugate base is the borohydride anion.