The photoelectron spectra of a series of ketone
compounds have been investigated in the gas phase. Core
ionization energies were measured to probe the effects of
molecular size and connectivity number on core ionization
energies.
It was found that core ionization energies roughly
decrease with increasing connectivity number as expected.
However, subdividing into several categories based on the
molecular type gives improved correlations.
These results show both the effect of molecular size
and that of bringing the polarizable group closer to the
core ionized center.
In some cases, compounds with the same connectivity
number have different core ionization energies and, in
others, compounds with different connectivity number have
the same core ionization energies. These discrepancies
indicate that the simple method for calculating connectivity
numbers must be modified to reflect different molecular
types. Other discrepancies indicate that this method does
not correctly predict the effects of remote hydrogens or the
effects of aromatic substituents, where conjugation may
influence the relaxation energy. / Graduation date: 1995
| Identifer | oai:union.ndltd.org:ORGSU/oai:ir.library.oregonstate.edu:1957/35202 |
| Date | 03 August 1994 |
| Creators | Situmeang, Rudy T. M. |
| Contributors | Thomas, T. Darrah |
| Source Sets | Oregon State University |
| Language | en_US |
| Detected Language | English |
| Type | Thesis/Dissertation |
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