Borazane

Chemical hydrides vdth empirical formula BH2NH2 and B N Hy have been probed as high-capacity hydrogen storage materials for a long time [100]. Earlier, H2 gas- 

5 Matek, W., Muhs, D., Wittel, H. and Becker, M. (1994) RolofF/Matek Maschinenelemente, Viewegs Fachbiicher der Technik. 

7 Teitel, R.J. (1981) Microcavity Hydrogen Storage, Final Progress Report. BrooWiaven National Laboratory. New York, BNL 51439 UC-94d,pp. 1-40. 

10 Flynn, T.M. (1992) Liqurfication of gases, in McGraw-Hill Encyclopedia of Science ei Technology, Vol. 10,7lbedn, McGraw-Hill, New York, pp. 106-109. 

11 NASA/NlSTdatabases,bttp //www.inspi. ufl.edu / data/b prop package.btml. 

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Nickel can also be deposited by reduction with the aid of boranates such as sodium boranate (NaBH4) or A-diethyl borazane, i.e. (C2Hj)2NH-BH3, the basic reaction proceeding as follows ... 

Within the field of Lewis adducts, we naturally studied the conformational analysis of the parent borazane complex, H3N BH3, and of its fluorinated derivatives (13) and showed that, with respect to their preferred conformation, there is no determinant AEN-.iH spatial term analogous to the AEP...H term discussed above relative to F3P BH3. 

Figure 5.61 Thermal desorption of hydrogen from borazane.

Doganay S, Borazan M, Iraz M, Cigremis Y. 2006. The effect of resveratrol in experimental cataract model formed by sodium selenite. Curr Eye Res 31 147-153. 

The complexes were obtained after the removal of thf and SMe2 under vacuum. Thermolysis of these complexes at 120 °C led to borazanes as intermediates. A further thermolysis at 200 °C gave the desired borazines, which were purified by distillation. 

An ab initio MO calculation carried out on H3B,NH3 (borazane) gave an insight into the origin of charge transfer and bond formation between BH3 and NH3.154 The calculation involved an expansion of the MO s of the addition compound in terms of those of the separate NH3 and BH3. 

Fujimoto H, Kato S, Yamabe S, Fukui K. Molecular orbital calculations of the electronic structure of borazane. J Chem Phys 1974 60 572-578. 

They are not highly polymeric, n being mainly 3, 4, or 5, and they were much more highly reactive than cyclic borazanes. They were, therefore, thought to be... 

L. T. Redmon, G. D. Purvis, III, and R. J. Bartlett, /. Am. Chem. Soc., 101, 2856 (1979). Accurate Binding Energies of Diborane, Borane Carbonyl, and Borazane Determined by Many-Body Perturbation Theory. (Correlated polarization exponents for DZP basis sets.)... 

The correlation was found to be valid for aminoboranes, R3BNR3, di-borazanes H3BNMe2BH2NR3 and cycloborazane (H2BNH2)2, where R and R = H or alkyl. 

Pyrolysis of ammonia-borane is a complex process, and the products of the decomposition reaction markedly depend on the conditions employed. Furthermore, the initial process is a solid-state reaction for which the onset of decomposition is a function of heating rate of the substrate (P). In thermogravimetric analyzer-Fourier transform infrared (TGA-FTIR) and thermogravimetric analyzer-differential scanning (TGA-DSC) analysis, heating a borazane sample to 90°C at a rate of 0.5°C/ min and then holding it at that temperature for 200 min resulted in a loss of about 10.2% of initial... 

Another important factor is interaction with water and other solvents. Unlike ionic hydrides, NH3BH3 does not react violently with water. Table 2 depicts the solubilities of borazane in water and a number of organic solvents. 

Borazane can be prepared through several indirect procedures including the reaction with lithium borohydride, LiBH4, in diethyl ether by either of the following two methods (LiCl = lithium chloride, Li2S04 = lithium sulfate, NH4CI = ammonium chloride, [NH4]2S04 = ammonium sulfate ... 

Condensation processes are used to prepare oligomers of organosiloxanes, silazanes, silthianes, borazines, borazanes, metaborates, metaphosphates, phosphazenes, thiazyls, alazanes, metal oxides and so on. 

Bayramlar H, Totan Y, Borazan M. Heparin in the intraocular irrigating solution in pediatric cataract surgery. J Cataract Refract Surg 2004 30 2163-2169. Dada T, Dada VK, Sharma N, Vajpayee RB. Primary posterior capsulorhexis with optic capture and intracameral heparin in paediatric cataract surgery. Clin Experiment Ophthalmol 2000 28 361-363. 

Without additional reagents a-Aminocarboxylic borinic anhydrides Stabilized borazanes... 

Dimethyl-S,S -bis (isooctylmercaptoacetate) tin. See Dimethyltin bis (isooctylthioglycollate) N-Dimethyl borazane. See Dimethylamine borane... 

Borane exchange reactions— Also borazanes by transamination s. 17, 690... 

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