Vibrational Spectra and Thermodynamics of the Zinc Halides

The infrared absorption spectra of the four zinc halides have been investigated by the low‐temperature matrix‐isolation technique. The spectral range 800–35 cm−1 has been covered. Four absorption regions have been observed in all cases. The highest energy region is structured and represents the antisymmetric stretching frequency ν3. The structure has been fully characterized as due to molecules of different isotopic compositions. The second and third absorption regions have been demonstrated to be due to higher polymers by means of double‐oven experiments. The lowest‐frequency absorption has been assigned as the bending vibration ν2. Statistical calculations of the molecular entropies have been carried out on the basis of the new results, and these entropy values are found to be in excellent agreement with third‐law entropy values where available.

[1]  D. R. Stull.  JANAF thermochemical tables , 1966 .

[2]  D. Irish,et al.  Raman Spectrum of Molten Zinc Chloride , 1965 .

[3]  O. Schnepp,et al.  Schumann—Runge Bands of O2 in Solid Phases: Spectroscopic Measurement of Intermolecular Potentials , 1965 .

[4]  O. Schnepp,et al.  Infrared Spectra of the Lithium Halide Monomers and Dimers in Inert Matrices at Low Temperature , 1964 .

[5]  A. Büchler,et al.  Geometry of the Transition‐Metal Dihalides: The Fluorides of Manganese, Cobalt, Nickel, Copper, and Zinc , 1964 .

[6]  D. Hildenbrand.  Entropies of Some Gaseous Metal Dihalides , 1964 .

[7]  D. Cubicciotti,et al.  Vapor Pressures of Zinc Chloride and Zinc Bromide and Their Gaseous Dimerization , 1964 .

[8]  D. Cubicciotti,et al.  Heat Contents of Molten Zinc Chloride and Bromide and the Molecular Constants of the Gases , 1963 .

[9]  L. Brewer,et al.  Thermodynamic Properties of Gaseous Metal Dihalides. , 1963 .

[10]  D. E. Mann,et al.  Infrared Absorption Spectra of Carbon Suboxide and Malononitrile in Solid Argon Matrices , 1963 .

[11]  W. Brown,et al.  Molecular force fields in terms of coordinates under constraint , 1963 .

[12]  M. Linevsky.  Infrared Absorption Spectra of LiF and Li2F2 in Solid Argon, Krypton, and Xenon Matrices , 1963 .

[13]  D. Hornig,et al.  Infrared Spectra and Structures of the Crystalline Phases of CH4 and CD4 , 1962 .

[14]  A. Emslie,et al.  Infrared Spectra of the Group II Halides: Zinc Halides and the Ionic Model , 1962 .

[15]  H. Tasman,et al.  Double‐Oven Experiments with Lithium Halide Vapors , 1962 .

[16]  M. Linevsky.  Infrared Spectrum of Lithium Fluoride Monomer by Matrix Isolation , 1961 .

[17]  R. F. Porter,et al.  Molecular Structure of Lithium Chloride Dimer. Thermodynamic Functions of Li2X2 (X = Cl, Br, I) , 1960 .

[18]  A. Büchler,et al.  Infrared Spectra of the Alkaline‐Earth Halides. I. Beryllium Fluoride, Beryllium Chloride, and Magnesium Chloride , 1958 .

[19]  S. Rice,et al.  Spectra of the Alkali Halides. II. The Infrared Spectra of the Sodium and Potassium Halides, RbCl, and CsCl , 1957 .

[20]  W. Klemperer.  Comparison of Force Constants in Radicals and Molecules. The Halides of Zinc, Cadmium, and Mercury , 1956 .

[21]  L. P. Lindeman,et al.  Infrared Spectrum of Mercuric Chloride and Bromide , 1956 .

[22]  W. Klemperer.  Infrared Spectrum of Gaseous Aluminum Chloride , 1956 .

[23]  G. Herzberg,et al.  Infrared and Raman spectra of polyatomic molecules , 1946 .

[24]  K. J. Palmer,et al.  The Electron Diffraction Investigation of Aluminum Chloride, Bromide, and Iodide , 1938 .

[25]  C. Venkateswaran.  The raman spectra of some metallic halides , 1935 .