Pentaborane oxidation

The partial slow oxidation of B5H9 was examined by Bauer et at 25 °C 

Snyder et studied pentaborane oxidation both in the single-pulse shock 

The reaction of pentaborane with O2 below the first explosion limit in spherical Pyrex vessels was investigated by Price °. Blue light is emitted which increases in intensity by raising [B5H9], but decreases in intensity with an enhancement of [O2]. The first explosion limit can be expressed by 

The subsequent chain mechanism proposed by Rosenkrans violated the law of microscopic reversibility. 

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Methyl isocyanate Nickel tetracarbonyl Nitrogen oxides Oxygen difluoride Pentaborane Phosgene... 

Palladium Paraformaldehyde Paraldehyde Pentaborane-9 Pentacarbonyliron Arsenic, carbon, ozonides, sulfur, sodium tetrahydridoborate Liquid oxygen Alkalies, HCN, iodides, nitric acid, oxidizers Dimethylsulfoxide Acetic acid, nitric oxide, transition metal halides, water, zinc... 

Reduction of the pentaalkyl-1,5-dicarba-closo-pentaboranes(5) 44 with elemental K opens the cluster and subsequent reaction with I2 enforces oxidative fusion of two C2B3 units to give a C4B6 cage (Scheme 3.2-36). The peralkylated hexaboraadamantane derivatives 70 (R = Me, Et X-ray structure analysis for R = Me [89]) rearrange irreversibly into the carboranes 71 with a wido-C4B6 framework [89] (X-ray structural analysis for R = Et [90]). The structure of the nido-C Bf, cluster is fluxional in solution [91]. 

Pentaborane Diborane Decaborane Sodium borate Boron trifluoride Calcium borate Boron tribromide Boron oxide Total dust Respirable fraction Sodium tetraborate Decahydrate... 

Nickel(II) cyanide, 0993 Nitrogen oxide, 4719 Nitrogen trichloride, 4137 Nitrogen triodide, 4628 Nitrosyl chloride, 4017 Nitryl chloride, 4019 Nitryl hypofluorite, 4298 Oxygen difluoride, 4311 f Pentaborane(9), 0188 f 1,4-Pentadiene, 1891 f 1,3-Pentadiene, 1890 f 1,2-Pentadiene, 1889 f 2-Pentyne, 1893 f 1-Pentyne, 1892... 

Niobiun oxide (Nb20g) NbgOgCcr.l) 1618 Pentaborane (BgHg) w > 300... 

UlOj(g) Boron oxide (BO) 252 BgHgd) Pentaborane (8g8g) 300... 

As part of studies concerned with the stabilisation of pentaborane(9) towards aerial oxidation, the reaction of B5H9 with EtsNH and 3-hexyne or phenylacetylene in THF at room temperature has been reported. The products are mdo-2,3-Et2-2,3-C2B4H6 80% yield) or nido-... 

The alkylpentaboranes are sensitive to air oxidation and to hydrolysis, the derivatives with smaller alkyl groups resembling pentaborane(9) more closely in this respect (249,267). Known alkylpentaboranes are summarized in Table III. 

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