LOW-FREQUENCY VIBRATIONAL-SPECTRA OF SEVERAL TYPES OF COORDINATION-COMPOUNDS

This dissertation is concerned with a vibrational spectroscopic investigation of several important types of coordination compounds. As stated before, the metal-ligand vibrations are the most important in elucidating the coordination sites and the nature of the coordination bonds, and hence the investigation is focused on the low-frequency region of the spectra where the metal-ligand vibrations appear. Throughout this investigation, the new metal isotope technique has been utilized since it has been proven to be superior to the conventional techniques mentioned earlier. The coordination compounds studied in this thesis work are classified into two groups; 1) six coordinate tin (IV) halide complexes with various ligands 2) several types of the first row transition metal complexes with 8-hydroxyquinoline (or oxine)

INFRARED SPECTRA AND FORCE CONSTANTS OF 116SnCl4^{116}SnCl_{4} AND 124SnCl4^{124}SnCl_{4}

Author Institution: Institut fur Chemie der, Universit\""{a}t Dortmund; Department of Chemistry, Marquette UniversityThe infrared spectra of gaseous $^{116}SnCl_{4}$ and $^{124}SnCl_{4}$ have been measured. From the isotope shift of ${\nu}_{3}(F_{2})$ the force constants of $SnCl_{4}$ have been calculated and compared with those obtained by using other data such as vibrational amplitudes and Coriolis coupling constants. It has been shown that the metal isotope substitution can be used for the calculation of force constants with reasonable error limits. From the exact force field of the tetrahedral molecule the vibrational frequencies of $^{116}Sn^{35}Cl_{3}^{37}Cl, ^{116}Sn^{35}Cl_{2}^{37}Cl_{2}$ and $^{116}Sn^{35}Cl^{37}Cl_{3}$ have been calculated. These frequency data allow an interpretation of the band contours of the ${\nu}_{3}(F_{2})$-fundamental of $^{116}SnCl_{4}$ and $^{124}SnCl_{4}$