摘要:

The available rate data on the reactivity and physical deactivation of molecular oxygen in its first electronic excited state (1&Dgr;g) in liquid solution have been critically compiled. Where possible, relative rates reported in the literature have been normalized to standard values selected by a statistical analysis of the experimental data. Second order rate constants for the deactivation and chemical reaction of singlet oxygen are reported for 670 compounds. Additionally, psuedo first order rate constants (kd) for solvent deactivation of singlet oxygen are reported for 50 different solvents.

ISSN:0047-2689    

DOI:10.1063/1.555655

出版商:AIP    

年代:1981

数据来源: AIP

摘要:

The heat capacity of poly(oxymethylene), poly(oxyethylene), poly(oxytrimethylene), poly(oxytetramethylene), poly(oxyoctamethylene), poly(oxypropylene), Poly(oxymethyleneoxyethylene), poly(oxymethyleneoxytetramethylene), poly(oxy‐1,4‐phenylene), poly(oxy‐2,6‐dimethyl‐1,4‐phenylene), ploy(oxy‐2,6‐diphenyl‐1,4‐phenylene) and poly[oxy‐2,2‐bis(chloromethyl)trimethylene] is reviewed on the basis of measurements on 35 samples reported in the literature. The crystallinity dependence is critically evaluated and a set of recommended data for each polyoxide is derived. Entropy, enthalpy, and Gibbs energy functions are calculated. The data have been compared to that of polyethylene and the contribution of ‐O‐group has been evaluated. This paper is the third in a series which will ultimately

ISSN:0047-2689    

DOI:10.1063/1.555649

出版商:AIP    

年代:1981

数据来源: AIP

摘要:

The heat capacity of polypropylene from 0 K to 600 K is reviewed on the basis of measurements on 20 samples reported in the literature. The crystallinity dependence is critically evaluated and a set of recommended data for completely crystalline and amorphous polypropylene are derived. The effect of tacticity on the heat capacity is also evaluated. Entropy, enthalpy, and Gibbs energy functions are calculated. This paper is the fourth in a series of publications which will ultimately cover all heat capacity measurements on linear macromolecules.

ISSN:0047-2689    

DOI:10.1063/1.555650

出版商:AIP    

年代:1981

数据来源: AIP

摘要:

Data from the literature has been critically selected and refitted by least squares to provide accurate vibrational band centers and rotational constants for three bands of N2O. The line positions of the bands have been calculated from the constants of the fits to provide accurate absorption line positions to serve as wavelength standards in the regions of 522 cm−1to 657 cm−1and from 1115 cm−1to 1340 cm−1in the infrared.

ISSN:0047-2689    

DOI:10.1063/1.555651

出版商:AIP    

年代:1981

数据来源: AIP

摘要:

The available data on methane are critically reviewed for information applicable to radio astronomy. Molecular data such as rotational constants, centrifugal distortion constants, and the distortion electric dipole moment are presented for12CH4and13CH4. Observed microwave, infrared‐microwave double resonance, and molecular beam measurements of (&Dgr;J= 0) frequencies are tabulated along with experimental uncertainties which represent estimated 95% confidence limits. For12CH4, these data have been analyzed to predict allQ‐branch rotational transitions forJ?20; the predictions are presented with 95% confidence limits which have been calculated from the analysis.

ISSN:0047-2689    

DOI:10.1063/1.555652

出版商:AIP    

年代:1981

数据来源: AIP

摘要:

The energy levels of the cobalt atom in all of its stages of ionization, derived from analyses of atomic spectra, have been critically compiled. In cases where only line classifications are reported in the literature, level values have derived. Electron configurations, term designations,J‐values, experimentalg‐values, leading percentages and ionization energies are included.

ISSN:0047-2689    

DOI:10.1063/1.555653

出版商:AIP    

年代:1981

数据来源: AIP

摘要:

The Henry’s law constants (air‐water partition coefficients) of hydrophobic organic compounds of environmental concern are reviewed. An outline of the thermodynamic principles which govern the relationships between vapor pressure, solubility and Henry’s law constant for solid and liquid compounds is presented and experimental techniques for obtaining these quantities with the required accuracy are discussed. Vapor pressure, solubility, and Henry’s law constant data are tabulated and reviewed for a total of 150 compounds in 12 tables consisting of gaseous, liquid and solid alkanes, cycloalkanes, alkenes

ISSN:0047-2689    

DOI:10.1063/1.555654

出版商:AIP    

年代:1981

数据来源: AIP