A MATRIX-ISOLATION INFRARED STUDY OF THE ADDUCTS OF TRIETHYL PHOSPHATE WITH CCL4, CHCL3 AND CH2CL2

Citation
L. George et al., A MATRIX-ISOLATION INFRARED STUDY OF THE ADDUCTS OF TRIETHYL PHOSPHATE WITH CCL4, CHCL3 AND CH2CL2, SPECT ACT A, 51(4), 1995, pp. 587-593
Citations number
26
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Spectroscopy
ISSN journal
1386-1425
Volume
51
Issue
4
Year of publication
1995
Pages
587 - 593
Database
ISI
SICI code
1386-1425(1995)51:4<587:AMISOT>2.0.ZU;2-U
Abstract
An infrared spectroscopic study is reported of the adducts of triethyl phosphate (TEP) with CCl4, CHCl3 and CH2Cl2, isolated in a nitrogen m atrix. The adduct formation is identified from a red shift in the phos phoryl (P=O) stretching vibration of triethyl phosphate. The experimen tal data are explained on the basis of adduct formation involving the interaction between the phosphoryl oxygen of the triethyl phosphate an d the chlorine of the chloromethanes. The shift in the P=O frequencies as a result of the complex formation with the chloromethanes follows the order: CCl4< CHCl3 much less than CH2Cl2, which is in keeping with the Lewis acidities of chlorine in these compounds. These complexes a re similar to the van der Waals or anti-hydrogen-bonded complexes seen in the case of HF adducts with some bases. No evidence is observed fo r the formation of any hydrogen-bonded adduct of TEP with CHCl3 and CH 2Cl2.