Abstract
Various aspects of Di 2-ethylhexylphosphoric acid (DEHPA) synthesis were investigated using {sup 1}H, {sup 13}C and {sup 31}P NMR techniques. The first step of the present work consists of the identification and the determination of DEHPA, its derivatives and other intermediates in the reaction mixture without previous separation or purification. The second step is devoted to the study of the effects of the main factors, i.e. the reaction temperature, ROH/P{sub 2}O{sub 5} mole ratio, the reaction time and the presence of some additives upon the reaction. The spectra and the distribution of the reaction products were also discussed. As an important conclusion which can be withdrawn from the present investigations one can suggest that the -26 ppm triplet is due to the presence of triphosphorus compounds. Such compounds should result from the direct interaction between 2-ethylhexanol and the polymeric phosphorus anhydride during the first 40 minutes after the beginning of the reaction. Pyrophosphates i.e. diphosphorus intermediates and the monoester which exhibit a relatively higher stability were also yielded.
Elias, A;
Azouz, A;
[1]
Rodehueser, L
[2]
- Centre de Developpement des Materiaux, Algiers (Algeria). Lab. de Synthese Organique
- Nancy Univ., 54 (France). Lab. de Chimie Physique Organique
Citation Formats
Elias, A, Azouz, A, and Rodehueser, L.
NMR study of the synthesis of Di 2-ethylhexylphosphoric acid with P{sub 4}O{sub 10}; Etude de la synthese de l`acide Di 2-ethylhexylphosphorique a partir de P{sub 4}O{sub 10} par resonnance magnetique nucleaire.
Algeria: N. p.,
1991.
Web.
Elias, A, Azouz, A, & Rodehueser, L.
NMR study of the synthesis of Di 2-ethylhexylphosphoric acid with P{sub 4}O{sub 10}; Etude de la synthese de l`acide Di 2-ethylhexylphosphorique a partir de P{sub 4}O{sub 10} par resonnance magnetique nucleaire.
Algeria.
Elias, A, Azouz, A, and Rodehueser, L.
1991.
"NMR study of the synthesis of Di 2-ethylhexylphosphoric acid with P{sub 4}O{sub 10}; Etude de la synthese de l`acide Di 2-ethylhexylphosphorique a partir de P{sub 4}O{sub 10} par resonnance magnetique nucleaire."
Algeria.
@misc{etde_10121538,
title = {NMR study of the synthesis of Di 2-ethylhexylphosphoric acid with P{sub 4}O{sub 10}; Etude de la synthese de l`acide Di 2-ethylhexylphosphorique a partir de P{sub 4}O{sub 10} par resonnance magnetique nucleaire}
author = {Elias, A, Azouz, A, and Rodehueser, L}
abstractNote = {Various aspects of Di 2-ethylhexylphosphoric acid (DEHPA) synthesis were investigated using {sup 1}H, {sup 13}C and {sup 31}P NMR techniques. The first step of the present work consists of the identification and the determination of DEHPA, its derivatives and other intermediates in the reaction mixture without previous separation or purification. The second step is devoted to the study of the effects of the main factors, i.e. the reaction temperature, ROH/P{sub 2}O{sub 5} mole ratio, the reaction time and the presence of some additives upon the reaction. The spectra and the distribution of the reaction products were also discussed. As an important conclusion which can be withdrawn from the present investigations one can suggest that the -26 ppm triplet is due to the presence of triphosphorus compounds. Such compounds should result from the direct interaction between 2-ethylhexanol and the polymeric phosphorus anhydride during the first 40 minutes after the beginning of the reaction. Pyrophosphates i.e. diphosphorus intermediates and the monoester which exhibit a relatively higher stability were also yielded.}
place = {Algeria}
year = {1991}
month = {Dec}
}
title = {NMR study of the synthesis of Di 2-ethylhexylphosphoric acid with P{sub 4}O{sub 10}; Etude de la synthese de l`acide Di 2-ethylhexylphosphorique a partir de P{sub 4}O{sub 10} par resonnance magnetique nucleaire}
author = {Elias, A, Azouz, A, and Rodehueser, L}
abstractNote = {Various aspects of Di 2-ethylhexylphosphoric acid (DEHPA) synthesis were investigated using {sup 1}H, {sup 13}C and {sup 31}P NMR techniques. The first step of the present work consists of the identification and the determination of DEHPA, its derivatives and other intermediates in the reaction mixture without previous separation or purification. The second step is devoted to the study of the effects of the main factors, i.e. the reaction temperature, ROH/P{sub 2}O{sub 5} mole ratio, the reaction time and the presence of some additives upon the reaction. The spectra and the distribution of the reaction products were also discussed. As an important conclusion which can be withdrawn from the present investigations one can suggest that the -26 ppm triplet is due to the presence of triphosphorus compounds. Such compounds should result from the direct interaction between 2-ethylhexanol and the polymeric phosphorus anhydride during the first 40 minutes after the beginning of the reaction. Pyrophosphates i.e. diphosphorus intermediates and the monoester which exhibit a relatively higher stability were also yielded.}
place = {Algeria}
year = {1991}
month = {Dec}
}