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Oct 1981

Volume 10, Issue 4, pp. 809-1199


Rate constants for the decay and reactions of the lowest electronically excited singlet state of molecular oxygen in solution

Francis Wilkinson and James G. Brummer

J. Phys. Chem. Ref. Data 10, 809 (1981); http://dx.doi.org/10.1063/1.555655 (191 pages)

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The available rate data on the reactivity and physical deactivation of molecular oxygen in its first electronic excited state (1Δg) 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.
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82.20.Pm Rate constants, reaction cross sections, and activation energies
82.30.Cf Atom and radical reactions; chain reactions; molecule-molecule reactions
82.20.Rp State to state energy transfer

Heat capacity and other thermodynamic properties of linear macromolecules. III. Polyoxides

Umesh Gaur and Bernhard Wunderlich

J. Phys. Chem. Ref. Data 10, 1001 (1981); http://dx.doi.org/10.1063/1.555649 (49 pages) | Cited 3 times

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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 cover all heat capacity measurements on linear macromolecules.
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65.40.Ba Heat capacity
82.60.Fa Heat capacities and heats of phase transitions
36.20.Fz Constitution (chains and sequences)

Heat capacity and other thermodynamic properties of linear macromolecules. IV. Polypropylene

Umesh Gaur and Bernhard Wunderlich

J. Phys. Chem. Ref. Data 10, 1051 (1981); http://dx.doi.org/10.1063/1.555650 (14 pages) | Cited 3 times

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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.
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65.40.Ba Heat capacity
36.20.Fz Constitution (chains and sequences)
82.60.Fa Heat capacities and heats of phase transitions

Tables of N2O absorption lines for the calibration of tunable infrared lasers from 522 cm−1 to 657 cm−1 and from 1115 cm−1 to 1340 cm−1

W. B. Olson, A. G. Maki, and W. J. Lafferty

J. Phys. Chem. Ref. Data 10, 1065 (1981); http://dx.doi.org/10.1063/1.555651 (20 pages) | Cited 5 times

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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−1 to 657 cm−1 and from 1115 cm−1 to 1340 cm−1 in the infrared.
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33.20.Ea Infrared spectra
33.20.Vq Vibration-rotation analysis
33.15.Mt Rotation, vibration, and vibration-rotation constants

Microwave spectra of molecules of astrophysical interest. XX. Methane

I. Ozier, M. C. L. Gerry, and A. G. Robiette

J. Phys. Chem. Ref. Data 10, 1085 (1981); http://dx.doi.org/10.1063/1.555652 (11 pages) | Cited 1 time

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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 for 12CH4 and 13CH4. Observed microwave, infrared‐microwave double resonance, and molecular beam measurements of (ΔJ = 0) frequencies are tabulated along with experimental uncertainties which represent estimated 95% confidence limits. For 12CH4, these data have been analyzed to predict all Q‐branch rotational transitions for J?20; the predictions are presented with 95% confidence limits which have been calculated from the analysis.
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33.20.Bx Radio-frequency and microwave spectra
33.15.Mt Rotation, vibration, and vibration-rotation constants
98.38.Bn Atomic, molecular, chemical, and grain processes
98.38.Er Interstellar masers
98.58.Bz Atomic, molecular, chemical, and grain processes
98.58.Ec Interstellar masers

Energy levels of cobalt, Co I through Co XXVII

Jack Sugar and Charles Corliss

J. Phys. Chem. Ref. Data 10, 1097 (1981); http://dx.doi.org/10.1063/1.555653 (78 pages) | Cited 3 times

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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, experimental g‐values, leading percentages and ionization energies are included.
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32.30.Jc Visible and ultraviolet spectra
32.10.Hq Ionization potentials, electron affinities

A critical review of Henry’s law constants for chemicals of environmental interest

Donald Mackay and Wan Ying Shiu

J. Phys. Chem. Ref. Data 10, 1175 (1981); http://dx.doi.org/10.1063/1.555654 (25 pages) | Cited 9 times

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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, alkynes, monoaromatics, polynuclear aromatics, halogenated alkanes, alkenes and aromatics, and selected pesticides.
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82.60.Lf Thermodynamics of solutions
82.60.Hc Chemical equilibria and equilibrium constants
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