Boron thermodynamic properties

Kakihana H, Kotaka M, Satoh S, Nomura M, Okamoto M (1977) Fundamental studies on the ion-exchange separation of boron isotopes. Bull Chem Soc Japan 50 158-163 Kieffer SW (1982) Thermodynamics and lattice vibrations of minerals 5. Applications to phase equilibria, isotopic fractionation, and high-pressure thermodynamic properties. Rev Geophys Space Phys 20 827-... 

Reassessment of the Si-B system was based primarily on the model parameters given by Fries and Lukas [25], Modifications have been made on the thermodynamic properties of the liquid and solid diamond phases Experimental liquidus data reported by Brosset and Magunsson [26], Armas et al. [27], and Male and Salanoubat [28], solid solubility data reported by Trum-bore [18], Hesse [29], Samsonov and Sleptsov [30], and Taishi et al. [52], as well as the boron activities in liquid phase measured by Zaitsev et al. [32], Yoshikawa and Morita [33], Inoue et al. [7], and Noguchi et al. [31] were all used to determine the model parameters. Figure 13.4 shows the new assessed phase equilibria in the Si-rich Si-B system. 

Although several important classes of boron compounds will not be discussed here because of space limitation, this chapter attempts to discuss the representative transformations which are likely to be useful for researchers with little experience in organoboron chemistry. No attempt is made to cover in detail physical properties however, information on boron-carbon bond lengths, nuclear magnetic resonance ( B and H), vibrational spectroscopy, electronic transitions, mass spectrometry, and thermodynamic properties of organoboron compounds has been summarized in earlier texts [1]. 

Thus, the data in Tables 2-4 can be used to calculate, with reasonable (or better) accuracy over a wide range of temperatures, thermodynamic properties of numerous reactions implicated in the combustion of boron- and aluminum-containing propellant formulations. The kinetics can be addressed as well, as was shown in a number of instances. The determination of transition states and activation barriers can be rather time-consuming. However computational methodology continues to improve (e.g. a new version of CBS-QB3... 

Bolgar AS, Blinder AV, Muratov VB, Makarenko GN (1990) Thermodynamic properties of boron silicides. In Silicides and their application in technology Collection of scientific papers (in Russian). Inst Probl Materialoved, Akad Nauk UkrSSR, Kiev, p 78... 

Because in the west of China some salt lake brines contain abundant boron and lithium, in which solute-solvent and solute-solute interactions are complex, studies on the ihermochemical properties for the systems related with the brines are essential to understand the effects of temperature on excess free energies and solubility, and to build a thermodynamic model that can be applied for prediction of the properties. Yin et al. [43] measured the enthalpies of dilution for aqueous Li2B407 solutions from 0.0212 to 2.1530 mol/kg at 298.15 K. The relative apparent molar enthalpies and relative partial molar enthalpies of the solvent and solute were also calculated, and the thermodynamic properties of the complex aqueous solutions were represented by a modified Pitzer ion-interaction model. 

Sop] Sopousek, J., Vrestal, J., Phase Equihbria in the Fe-Cr-Ni and Fe-Cr-C Systems , Z. Metallkd., 85(2), 111-115 (1994) (Morphology, Phase Diagram, Experimental, 20) [1994Wit] Witusiewicz, V.T., Thermodynamic Properties of Liquid Alloys of 3d Transition Metals with Metalloids (Sihcon, Carbon and Boron) , J. Alloys Compd., 203, 103-116 (1994) (Thermodyn., Experimental, Review, 89)... 

Thermodynamic properties of superhard materials produced from the dense modifications of boron nitride, especially of p-BN [7 to 9], have also been studied. The data for Cpfor Kiborit correspond closely to those of p-BN single crystals as given in Table 4/2. Also the Debye temperature of Kiborit [8] (1680 70 K) corresponds to the value for p-BN [6] see [9] for data up to 1400 K. 

Mutelet F., Jaubert J.N., Rogalski M., Boukherissa M. Dicko A. (2006). Thermodynamic Properties of Mixtures Containing Ionic Liquids Activity Coefficients at Infinite Dilution of Organic Compounds in 1-Propyl Boronic Acid-3-Alkylimidazolium Bromide and l-Propenyl-3-alkylimidazolium Bromide Using Inverse Gas Chromatography, /, Chem. Eng. Data, vol.51, n°4, pp.1274-1279, (April 2006), ISSN 0021-9568... 

Mutelet, F. Jaubert, J.-N. Rogalski, M. Boukheiissa, M. Dicko, A. (2006). Thermodynamic properties of mixtures containing ionic hquids Activity coefficients at infinite dilution of organic compounds in 1-propyl boronic acid-3-alkylimidazolium bromide and l-propenyl-3-alkyhmidazohum bromide using inverse gas chromatography. /. Chem. Eng. Data, 4,51,1274-1279. 

Wit] Witusiewisz, V.T., Thermodynamic Properties of Liquid Alloys of 3d Transition Metals with Metalloids (Silieon, Carbon and Boron) , J. Alloys Compd., 203, 103-116 (1994) (Thermodyn., 89)... 

Zai] Zaitsev, A., Zaitseva, N., Kodentsov, A., Thermodynamic Properties and Phase Equilibria in the Iron-Boron System. Transition of the Fe-B Melt into the Amorphous State , J. Mater. Chem., 13, 943-950 (2003) (Experimental, Thermodyn., 65)... 

This Lewis acid accomplishes several functions. (1) Noncovalent protection of the 4-N-OH group which is accepted as fourth ligand to boron and thus possibility to take over electron density released from the 7-methoxy group in the critical case of DIMBOA (2) enhancement of the nucleophilic properties of the hemiacetal which was also shown to interact with the Lewis acid (3) promoter function for activation of the trichloroacetimidate glucosyl donor (4) equilibration conditions of any non-favoured diastereomers to the thermodynamically more stable... 

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