Accession Number : AD0006418


Title :   PREPARATION AND PROPERTIES OF ORGANIC DERIVATIVES OF TIN HYDRIDE


Corporate Author : TENNESSEE AGRICULTURAL AND INDUSTRIAL STATE UNIV NASHVILLE


Personal Author(s) : Dillard, C R ; Holmes, E E


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/006418.pdf


Report Date : 31 Aug 1952


Pagination or Media Count : 36


Abstract : Thermochemical studies of organo-tin compounds were made to obtain data for the calculation of bond energies and electronegativity of the metal. The heats of combustion were -934 + or - 2.8, -1547 + or - 1.5, -2816 + or - 3. 9, -3182 + or - 1.8, and -4060 + or - 3.2, for Me4Sn, Et4Sn, Bu4Sn, Ph4Sn, and tetrahexyl tin, respectively. Heats of formation calculated from these data are also presented. Calculations of the Sn-C bond energies from Pauling's empirical values of single-bond energies and heats of atomization indicated that the bond energies in the organo-tin molecules were additive and that the Sn-C bond energy had a reasonably constant value of about 25 kg-cal/mole. The spectrograms of 6 symmetrically substituted alkyl stannanes were studied. Preliminary frequency assignments are listed for the stretching and deformation vibrations of the C-H bond. No skeletal vibrations appeared in the 2- to 16-micron spectral range. Unsuccessful attempts made to prepare chloroethyl stannanes by the methods used to prepare analogous Si compounds indicated a difference in bond type.


Descriptors :   *TIN COMPOUNDS , MOLECULAR VIBRATION , DEFORMATION , CHEMICAL BONDS , ATOMIZATION , THERMOCHEMISTRY , SKELETON , COMPUTATIONS , COMBUSTION


Subject Categories : Organic Chemistry


Distribution Statement : APPROVED FOR PUBLIC RELEASE