703-86-6Relevant academic research and scientific papers
The synthesis and characterization of nitrooxy- and nitrosooxyborazine compounds
Klap?tke, Thomas M.,Rusan, Magdalena
, (2014)
B-Nitrosooxypentamethylborazine, B-nitrooxypentamethylborazine and B-trinitrooxy-N-trimethylborazine have been synthesized and characterized by 1H, 13C, 11B, and 14N NMR spectroscopy, mass spectrometry, vibratio
A solid-state multinuclear magnetic resonance investigation of hexamethylborazine
Forgeron, Michelle A.M.,Bryce, David L.,Wasylishen, Roderick E.,Roesler, Roland
, p. 726 - 735 (2003)
Analyses of 11B, 13C, and 2H NMR spectra of solid hexamethylborazine, I, provide conclusive evidence for rapid in-plane jumps of the borazine ring at room temperature. Boron-11 NMR spectra of magic-angle spinning (MAS) samples, acquired at low (4.7 T), moderate (9.4 T), and high (18.8 T) external applied magnetic field strengths, have been simulated to yield the 11B nuclear quadrupolar coupling constant (CQ), asymmetry parameter, and isotropic chemical shift; their values at 298 K are 2.98 ± 0.03 MHz, 0.01 ± 0.01, and 36.0 ± 0.4 ppm, respectively. Simulations of 13C CP/MAS NMR spectra provide the carbon-boron isotropic indirect spin-spin coupling constant, Jiso, the sign of CQ(11B), the relative orientations of the boron electric field gradient (EFG) and the 13C-11B dipolar coupling tensors, and the motionally averaged 13C-11B dipolar coupling constant. Variable-temperature 2H NMR spectra of a partially deuterated sample of I indicate that the in-plane jumps of the borazine ring are slow with respect to CQ(2H)-1 (i.e., τjump ≥ 10-4 s) at temperatures less than 130 K. Over the temperature range 180 to 128 K, 2H NMR line shape analysis yields an activation energy of 30.1 ± 1.5 kJ mol-1 for the in-plane jumps of the borazine ring. Although a precise experimental determination of boron chemical shift anisotropy was impeded by intramolecular and intermolecular boron-boron dipolar interactions and heteronuclear nitrogen-boron dipolar interactions, simulations of high-field 11B NMR spectra of a stationary sample of I suggest a value of 55 ± 15 ppm for the motionally averaged span of the chemical shift tensor. Lastly, high-level ab initio and density functional theory calculations provide values of the boron EFG tensor and the boron and nitrogen magnetic shielding tensors for a rigid molecule of I.
METHOD FOR PRODUCING TRICHLOROBORAZINE COMPOUND AND METHOD FOR PRODUCING ALYKYLBORAZINE COMPOUND
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Page/Page column 14, (2008/06/13)
PROBLEM TO BE SOLVED: To provide a means for efficiently purifying a synthesized trichloroborazine compound. SOLUTION: The subject method for producing the trichloroborazine compound comprises the following steps. A step of reacting boron trichloride with an amine compound represented by R1NH3X (wherein, R1 is hydrogen atom or an alkyl group; and X is a halogen atom) in a solvent and producing the trichloroborazine compound represented by formula 2 (wherein, R2s may each the same or different and are each hydrogen atom or an alkyl group), a step of filtering the reaction solution and affording a filtrate and a step of distilling off the solvent from the filtrate and providing a solid substance composed of the trichloroborazine compound.
Alkylborazine compound and production method for the same
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Page/Page column 7; 8, (2008/06/13)
In the process of synthesizing alkylborazine compound represented by the chemical formula 2, by a reaction of a halogenated borazine compound represented by the chemical formula 1 with a Grignard reagent, thus synthesized alkylborazine compound is washed with water, or subjected to sublimation purification or distillation purification at least three times, and/or subjected to distillation purification at least twice. In the formulas, R1 independently represents alkyl group; R2 independently represents alkyl group; and X represents halogen atom.
Synthesis and thermal decomposition studies of some novel dimethyl(phenyl)silyl-substituted aminoboranes
Bowser, James R.,Marohn, Kristina F.,Gilbert, Stephanie R.,Robbins, Andrea M.
, p. 1559 - 1566 (2008/10/09)
Reactions of chloro(dimethyl)phenylsilane with primary amines have been used to obtain a series of compounds having the general formula C6H5(CH3)2SiNHR. The anions of those species are readily prepared, and may be reacted with trichloroborane or dichlorophenylborane to give the corresponding silylaminoboranes, C6H5(CH3)2SiN(R)B(X)Cl (X = Cl, Ph). The thermal properties of these silylaminoboranes have been probed using thermogravimetric analysis. The first step in their thermal degradation involves elimination of C6H5(CH3)2SiCl.
RINGS, POLYMERS, AND NEW MATERIALS CONTAINING PHOSPHORUS AND OTHER MAIN GROUP ELEMENTS OR TRANSITION METALS
Ziembinski, Ralf,Honeyman, Charles,Mourad, Ophyr,Foucher, Dan,Rulkens, Rudy,et al.
, p. 219 - 222 (2007/10/02)
Polymers which contain inorganic elements are attracting considerable attention because they provide access to materials with interesting, unusual and potentially useful properties.In this paper we emphasize some of out recent work aimed at exploiting ring-opening polymerization as a route to new inorganic and organometallic polymers containing the main group element phosphorus.For example, attempts to prepare new polymers which also contain boron are reported.In addition, recent results on the ring-opening polymerization of -metallocenophanes such as cyclic ferrocenylsilanes and cyclic ferrocenylphosphines, which possess strained ring-tilted structures, are described.Finally, some recent research on poly(thionylphosphazenes), a novel class of inorganic polymers with sulphur(VI)-nitrogen-phosphorus backbones, is discussed.
Molecular Quadrupole Moments, Magnetic Anisotropies, and Charge Distributions of Borazine, B-Trichloroborazine, N-Trimethylborazine, and B-Trichloro-N-trimethylborazine. Comparison with Benzene and Its Derivatives.
Dennis, Gary R.,Ritchie, Geoffrey L. D.
, p. 8403 - 8409 (2007/10/02)
Measurements of the dilute-solution molar Kerr constants, field-gradient birefringence constants, and Cotton-Mouton constants of borazine and three substituted borazines as solutes in cyclohexane or carbon tetrachloride at 25 deg C are reported.The observations yield the first direct experimental values of the effective polarizability anisotropies, electric quadrupole moments, and magnetic anisotropies, which are important descriptors of the molecular charge distributions.A comparison of the results for borazine with literature data for benzene shows that all three properties have the same signs in the two species but that all are considerably smaller in magnitude in borazine than in benzene.An analysis of the magnetizabilities indicates that the extent of electron delocalization in borazine is only about one-third of that in benzene, a conclusion which is consistent with a range of other evidence.
