摘要:

The thermodynamic and spectroscopic properties of the bromine oxide species have been reviewed. Recommended NIST–JANAF Thermochemical Tables are given for six gaseous bromine oxides: BrO, OBrO, BrOO, BrOBr, BrBrO, and BrO3. Sufficient information is not available to generate thermochemical tables for any condensed phase species. Annotated bibliographies (over 280 references) are provided for all neutral bromine oxides which have been reported in the literature. There are needs for additional experimental and theoretical data to reduce the uncertainties in the recommended values for these six species. Of all the species mentioned in the literature, many have not been isolated and characterized. In fact some do not exist. Throughout this paper, uncertainties attached to recommended values correspond to the uncertainty interval, equal to twice the standard deviation of the mean. ©1996 American Institute of Physics and American Chemical Society.

ISSN:0047-2689    

DOI:10.1063/1.555993

出版商:AIP    

年代:1996

数据来源: AIP

摘要:

The microwave spectrum of acetaldehyde is critically reviewed and supplemented with spectral frequency calculations derived from the rotation‐internal rotation analysis. A simultaneous analysis of the torsional ground state,vt=0, and first and second torsionally excited states,vt=1 and 2, was carried out. The primary objective of this review is to provide radio astronomers with complete spectral coverage over the range of 900 MHz to 500 GHz for the ground state and covering rotational quantum number,J, from 0 to 26. ©1996 American Institute of Physics and American Chemical Society.

ISSN:0047-2689    

DOI:10.1063/1.555983

出版商:AIP    

年代:1996

数据来源: AIP

摘要:

The data on thermodynamic and molecular properties of the lithium and sodium hydroxides have been collected, critically reviewed, analyzed, and evaluated. Tables of thermodynamic properties (C°p,&Fgr;°=−(G°−H°(0)/T,S°,H°−H°(0), &Dgr;fH°, &Dgr;fG°) of these hydroxides in the condensed and gaseous states have been calculated using the results of the analysis and some estimated values. The recommendations are compared with earlier evaluations given in the JANAF Thermochemical Tables and Thermodynamic Properties of Individual Substances. The properties considered are: the temperature and enthalpy of phase transitions and fusion, heat capacities, spectroscopic data, structures, bond energies, and enthalpies of formation at 298.15 K. The thermodynamic functions in solid, liquid, and gaseous states are calculated fromT=0 to 2000 K for substances in condensed phase and up to 6000 K for gases. ©1996 American Institute of Physics and American Chemical Society.

ISSN:0047-2689    

DOI:10.1063/1.555982

出版商:AIP    

年代:1996

数据来源: AIP

ISSN:0047-2689    

DOI:10.1063/1.555984

出版商:AIP    

年代:1996

数据来源: AIP