The ionization potentials of borazine by photoelectron spectrometry and indo theory
โ Scribed by D.C. Frost; F.G. Herring; C.A. McDowell; I.A. Stenhouse
- Publisher
- Elsevier Science
- Year
- 1970
- Tongue
- English
- Weight
- 154 KB
- Volume
- 5
- Category
- Article
- ISSN
- 0009-2614
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โฆ Synopsis
The 384 d photoelectron spectrum of borazine is given. and the ionization potentials compared nith previously cnlculntcd vnlues and \vith those found by an IhFDO calculation_ The purpose of this letter is to present the 584 A (21.22 ev) photoelectron spectrum of borazine B3N3H6, and to compare the experimental ionization potentials with previously calculated values and with ones we have calculated using the INDO method. Boyd et al. [l] have reported the orbital energies and charge densities in borazine calculated by the Hiickel MO. the BEEM-n and the SAVE-CNDO methods, and Davies [2] has carried out calculations by the CNDO-2 method on all the valence electrons of borazine, in which a minimum energy was obtained as a function of the B-N, B-H and N-H distances.
๐ SIMILAR VOLUMES
The ionization potentials of CF4 have been determined by photoelectron spectroscopy. and comparison made xlth the values obtained by an INDO-MO calculation. The theoretical calculations are also used to identify the various ionization processes observed experimentally.
mnizatlon b.md of ethyl radical bns been okcrvcd HI 3 photoelectron spectrometer. i'hc adlabdtic and ~rtic,d P's are 8.30 t: 0.02 eV and 8.55 + 0.02 cV, respcctivcly, and tbc beat ot formatIon of CzltIf is calculated to be 217.1 + "r-1 bcal/mol. Our data arc m good agreement with prcv~ou~ results.
The photoelectron spectra of methyl cyanide. methyl cyanide-+, and methyl acetylene have ken measured using the 584A helium resonance line as B light source. On the basis of CNDO/B and ISDO calculations the ionization potentials determined are assigned to ionizing processes from the various orbitals