150-46-9Relevant articles and documents
Beachell,Schar
, p. 2943 (1958)
Urs
, p. 29 (1957)
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Lehmann et al.
, p. 1226,1227,1228 (1959)
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Denson, C. L.,Crowell, T. I.
, p. 5656 - 5658 (1957)
Lalancette,Beauregard
, p. 5169 (1967)
Bains,Arthur jr.
, p. 365,368 (1971)
Methyl camouflage in the ten-vertex: Closo -dicarbaborane(10) series. Isolation of closo -1,6-R2C2B8Me8 (R = H and Me) and their monosubstituted analogues
Bakardjiev, Mario,Tok, Oleg L.,R??i?ka, Ale?,R??i?ková, Zdeňka,Holub, Josef,Hnyk, Drahomír,?palt, Zbyněk,Fanfrlík, Jind?ich,?tíbr, Bohumil
, p. 11070 - 11076 (2018)
Reported are procedures leading to the first types of methyl camouflaged dicarbadecaboranes with fewer than eleven vertices. The compounds contain the closo-1,6-C2B8 scaffolding inside the egg-shaped hepta-decamethyl sheath, which im
Beachell,Meeker
, p. 1796 (1956)
Low-Temperature Hypergolic Ignition of 1-Octene with Low Ignition Delay Time
Sheng, Haoqiang,Huang, Xiaobin,Chen, Zhijia,Zhao, Zhengchuang,Liu, Hong
, p. 423 - 434 (2021/02/05)
The attainment of the efficient ignition of traditional liquid hydrocarbons of scramjet combustors at low flight Mach numbers is a challenging task. In this study, a novel chemical strategy to improve the reliable ignition and efficient combustion of hydrocarbon fuels was proposed. A directional hydroboration reaction was used to convert hydrocarbon fuel into highly active alkylborane, thereby leading to changes in the combustion reaction pathway of hydrocarbon fuel. A directional reaction to achieve the hypergolic ignition of 1-octene was designed and developed by using Gaussian simulation. Borane dimethyl sulfide (BDMS), a high-energy additive, was allowed to react spontaneously with 1-octene to achieve the hypergolic ignition of liquid hydrocarbon fuel at -15 °C. Compared with the ignition delay time of pure 1-octene (565 °C), the ignition delay time of 1-octene/BDMS (9:1.2) decreased by 3850% at 50 °C. Fourier transform infrared spectroscopy and gas chromatography-mass spectrometry confirmed the directional reaction of the hypergolic ignition reaction pathway of 1-octene and BDMS. Moreover, optical measurements showed the development trend of hydroxyl radicals (OH·) in the lower temperature hypergolic ignition and combustion of 1-octene. Finally, this study indicates that the enhancement of the low-temperature ignition performance of 1-octene by hydroboration in the presence of BDMS is feasible and promising for jet propellant design with tremendous future applications.
Rehydrogenation of aminoboranes to amine-boranes using H2O: Reaction scope and mechanism
Leitao, Erin M.,Manners, Ian
, p. 2199 - 2205 (2015/05/13)
Water has been successfully employed as a reagent with which to rehydrogenate aminoboranes (e.g., iPr2N=BH2, 2,2,6,6-Me4C5H6N=BH2, and also transient Me2N=BH2 derived from 1/2[Me2N-BH2]2) to amine-boranes (e.g., iPr2NH·BH3, 2,2,6,6-Me4C5H6NH·BH3, Me2NH·BH3) in approximately 30 yield. The conversion to amine-boranes from the corresponding aminoboranes using this method represents an example of a metal-free, single-step route for the hydrogenation of the B=N bond. Deuterium labeling studies indicated that the protic hydrogen (N-H) on the rehydrogenated amine-borane was derived from H2O, whereas the third hydridic hydrogen (B-H) on the amine-borane was generated from the formation of a postulated hydride-bridged intermediate H2B(μ-H)(μ-NR2)B(OH)H (R2 = Me2, iPr2, 2,2,6,6-Me4C5H6), which requires a second equivalent of the starting aminoborane, thus explaining the low yield. Formation of insoluble borates (BxOyHz) provides a driving force for the reaction. Significantly, the yield can be increased by adding a sacrificial source of BH3 (e.g., to ca. 53% for BH3·THF) or by adding a separate source of H- (e.g., to ca. 95% for LiBH4) to complement the H+ (from H2O) in a more atom-efficient reaction.
