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Dependence of the long-range phosphorushydrogen coupling constant <SUP>n</SUP>J<INF>PH</INF> (n = 3,6,7) on the bond order between phosphorus and its substituents: preparation and spectroscopic characterization of several phosphoramidates
- Source :
- Magnetic Resonance in Chemistry; November 2001, Vol. 39 Issue: 11 p684-688, 5p
- Publication Year :
- 2001
-
Abstract
- The examination of spectra of a selected series of phosphoramidates showed that, in addition to a double bond, whenever there are one or two partial multiple bonds in the molecule the long-range coupling constant, such as <SUP>6</SUP>J<INF>PH</INF>, <SUP>7</SUP>J<INF>PH</INF> and <SUP>3</SUP>J<INF>PH</INF>, either disappears or at least reduces. In particular, the experimental data indicate the unexpected effect of a partial multiple bond between phosphorus and fluorine in <SUP>7</SUP>J<INF>PH</INF> and <SUP>3</SUP>J<INF>PH</INF>. The preparation of the compounds p-CH<INF>3</INF>C<INF>6</INF>H<INF>4</INF>NHP(O)Cl<INF>2</INF> (II), p-CH<INF>3</INF>C<INF>6</INF>H<INF>4</INF>NHP(O)(Cl)OC<INF>6</INF>H<INF>4</INF>CH<INF>3</INF>-p (XIV), m-CH<INF>3</INF>C<INF>6</INF>H<INF>4</INF>NHP(O)(Cl)OC<INF>6</INF>H<INF>4</INF>CH<INF>3</INF>-p (XV), m-CH<INF>3</INF>C<INF>6</INF>H<INF>4</INF>NHP(O)(Cl)OC<INF>6</INF>H<INF>4</INF>CH<INF>3</INF>-m (XVI) and the rigid molecule CH<INF>3</INF>C<INF>6</INF>H<INF>3</INF>(NH)<INF>2</INF>P(O)Cl (XVII) are described and they are characterized by <SUP>1</SUP>H, <SUP>13</SUP>C, <SUP>31</SUP>P NMR, IR spectroscopy and elemental analysis. Copyright © 2001 John Wiley & Sons, Ltd.
Details
- Language :
- English
- ISSN :
- 07491581 and 1097458X
- Volume :
- 39
- Issue :
- 11
- Database :
- Supplemental Index
- Journal :
- Magnetic Resonance in Chemistry
- Publication Type :
- Periodical
- Accession number :
- ejs444287