Inorganic Mass Spectrometry and Thermochemistry Related to Fuels, Structural Materials and Polymers.
Abstract
Measurements of the heats of hydrolysis of about 20 compounds of the type Me3M-X (Me = CH3; M = Si, Ge, or Sn; and X = Cl, Br, I, OMe, SC4H9-n, NMe2, NM3(MMe3), N(MMe3)2, and NH(MMe3)), and the heats of combustion of Et4Si, Me6Si2, and (Me3Si)2O analysis gave standard heats of formation and thermochemical bond energy terms. Computer analysis of thermochemical data has been carried out and a thermochemical center has been established to provide computer-processed, mutually-consistent and updated standard heats of formation. Measurements of 1st ionization potentials of all the 20 boron halides BXX'X'' mass spectrometrically and of other simple boron compounds, and quantum mechanical analysis of the results has been completed. Measurements of mass spectrometric appearance potentials for Group IV derivatives and computation of M-M and M-M' bond dissociation energies has been carried out. Measurements of 11B nuclear magnetic spectra for BXX'X''/BYY'Y'' systems provided equilibrium constants for redistribution and 11B/19F coupling constants. H n.m.r. spectra of BN compounds have provided BN rotational energy barrier data. Measurements of photon-excitation photoelectron spectra for simple compounds of BXX'X'' provided the energies of the four or five highest occupied orbital energy levels and their assignments according to symmetry and bonding. Measurements of 119Sn Mossbauer spectra and heteronuclear double resonance and 'Indor' spectra of many organotin compounds have been carried out. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1971
- Accession Number
- AD0725781
Entities
People
- J. B. Pedley
- Michael F. Lappert
Organizations
- University of Sussex