Spectroscopic Investigations of α-Keto Phosphorus Compounds
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概要
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The NMR, IR, and UV spectra of some α-keto phosphorus compounds, (C<SUB>2</SUB>H<SUB>5</SUB>)<SUB>2</SUB>PCOR, (C<SUB>2</SUB>H<SUB>5</SUB>)<SUB>2</SUB>P(S)COR, and [(C<SUB>2</SUB>H<SUB>5</SUB>)<SUB>2</SUB>CH<SUB>3</SUB>PCOR]<SUP>+</SUP>I<SUP>−</SUP> (R=C<SUB>6</SUB>H<SUB>5</SUB> and CH<SUB>3</SUB>), were measured. The carbonyl stretching frequency and the n-π<SUP>*</SUP> transition show considerable red shifts, but the shifts are smaller than those of α-keto organosilicon compounds. The lowering of the carbonyl π<SUP>*</SUP> level, which resulted from the interaction with a vacant d orbital of the phosphorus atom, was found to be largely responsible for the red shift of the n-π<SUP>*</SUP> transition in the α-keto phosphorus compounds, particularly in [(C<SUB>2</SUB>H<SUB>5</SUB>)<SUB>2</SUB>CH<SUB>3</SUB>PCOR]<SUP>+</SUP>I<SUP>−</SUP>. The rise in the n level of the carbonyl group was found to be rather small.
- 公益社団法人 日本化学会の論文
著者
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Otera Junzo
Department Of Applied Chemistry Faculty Of Engineering Okayama University Of Science
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Osaki Takayoshi
Department of Applied Chemistry, Osaka University
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Kawasaki Yoshikane
Department of Applied Chemistry, Osaka University
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