caa a22 4500 605545790 CHVBK 20210128100937.0 cr unu---uuuuu 210128e20151001xx s 000 0 eng 10.1007/s00723-015-0703-2 doi (NATIONALLICENCE)springer-10.1007/s00723-015-0703-2 The Hindered Internal Rotations in a Particular Phosphorane Involving a 6-aza Thiothymine: An Experimental Dynamic 1H NMR Study with Three Methods of Determining Activation Parameters [Elektronische Daten] [Eideh Mofarrah, Sayyed Habibi-Khorassani, Malek Maghsoodlou, Mehdi Shahraki] The hindered internal rotations around the partial carbon-carbon double bond , nitrogen-carbon and carbon-carbon single bonds within the dimethyl-2-(6-aza thiothymin-1-yl)-3-(triphenyl-phosphoran ylidene) butandioate has been experimentally studied by the dynamic 1H nuclear magnetic resonance (NMR) spectroscopic in variable temperatures. The activation (∆H ‡, ∆S ‡, ∆G ‡) and kinetic (k c, E a) parameters were calculated in a series of separate dynamic 1H NMR spectra. The energy of activation parameters obtained from classic, Eyring and Arrhenius methods were also compared. The results from Eyring and Arrhenius plots were in good agreement; however, were slightly different from the classic method. Springer-Verlag Wien, 2015 Mofarrah Eideh Department of Chemistry, University of Sistan and Baluchestan, P. O. Box 98135-674, Zahedan, Iran aut Habibi-Khorassani Sayyed Department of Chemistry, University of Sistan and Baluchestan, P. O. Box 98135-674, Zahedan, Iran aut Maghsoodlou Malek Department of Chemistry, University of Sistan and Baluchestan, P. O. Box 98135-674, Zahedan, Iran aut Shahraki Mehdi Department of Chemistry, University of Sistan and Baluchestan, P. O. Box 98135-674, Zahedan, Iran aut Applied Magnetic Resonance Springer Vienna 46/10(2015-10-01), 1179-1188 0937-9347 46:10<1179 2015 46 723 https://doi.org/10.1007/s00723-015-0703-2 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00723-015-0703-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Mofarrah Eideh Department of Chemistry, University of Sistan and Baluchestan, P. O. Box 98135-674, Zahedan, Iran aut NATIONALLICENCE 700 1- Habibi-Khorassani Sayyed Department of Chemistry, University of Sistan and Baluchestan, P. O. Box 98135-674, Zahedan, Iran aut NATIONALLICENCE 700 1- Maghsoodlou Malek Department of Chemistry, University of Sistan and Baluchestan, P. O. Box 98135-674, Zahedan, Iran aut NATIONALLICENCE 700 1- Shahraki Mehdi Department of Chemistry, University of Sistan and Baluchestan, P. O. Box 98135-674, Zahedan, Iran aut NATIONALLICENCE 773 0- Applied Magnetic Resonance Springer Vienna 46/10(2015-10-01), 1179-1188 0937-9347 46:10<1179 2015 46 723