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Habibi-Khorassani SM, Shahraki M, Mostafa B. Kinetics and Mechanism of the Formation of Ylides, 1, 4 or 1, 5-Diionic Organophosphorus and Phosphonate Esters: A Review. MINI-REV ORG CHEM 2018. [DOI: 10.2174/1570193x15666180612085855] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The kinetics and mechanism of the formation of some ylides,1,4 or 1,5-diionic organophosphorus and phosphonate esters have been reviewed. The UV-vis spectrophotometry, stopped-flow and variable-temperature 1H-NMR spectroscopy along with the theoretical calculations were used as investigative techniques.
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Affiliation(s)
| | - Mehdi Shahraki
- Department of Chemistry, University of Sistan and Baluchestan, P. O. Box 98135-674, Zahedan, Iran
| | - Bahareh Mostafa
- Department of Chemistry, University of Sistan and Baluchestan, P. O. Box 98135-674, Zahedan, Iran
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2
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Habibi-Khorassani SM, Shahraki M, Maghsoodlou MT, Erfani S. Dynamic ¹H NMR studies of hindered internal rotations in the synthesized particular phosphorus ylide: experimental and theoretical approaches. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 145:410-416. [PMID: 25796011 DOI: 10.1016/j.saa.2015.02.084] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Revised: 01/06/2015] [Accepted: 02/19/2015] [Indexed: 06/04/2023]
Abstract
Dynamic (1)H NMR measurements were performed within the synthesized particular phosphorus ylide involving 4-formylphenyl phenylcarbamate. Four rotational process and thereby parameters were targeted for rotation around the CC, C-C, HCNC and OCNC bonds. The Gibbs free activation energy in CDCl3, ΔG(≠)exp, was found to be 64 ± 2, 50 ± 2, 41 ± 2 and 63 ± 2, respectively. These findings were compared with related ab initio and DFT results on simulated situation. Theoretical methods tested, were comparable to the present D (1)H NMR data.
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Affiliation(s)
| | - Mehdi Shahraki
- Department of Chemistry, University of Sistan and Baluchestan, P.O. Box 98135-674, Zahedan, Iran
| | - Malek Taher Maghsoodlou
- Department of Chemistry, University of Sistan and Baluchestan, P.O. Box 98135-674, Zahedan, Iran
| | - Susan Erfani
- Department of Chemistry, University of Sistan and Baluchestan, P.O. Box 98135-674, Zahedan, Iran
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Habibi-Khorassani SM, Maghsoodlou MT, Ebrahimi A, Aghdaei E, Kazemian MA. 1H NMR spectroscopic investigation of the kinetics of the equilibrium between Z and E isomers. RESEARCH ON CHEMICAL INTERMEDIATES 2014. [DOI: 10.1007/s11164-013-1125-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Dehdab M, Habibi-Khorassani S, Shahraki M. Kinetics and Mechanism Investigation of the Synthesized Highly Diasteroselective Substituted Tetrahydropyridines in the Presence of La(NO3)3.6H2O as a Catalyst. Catal Letters 2014. [DOI: 10.1007/s10562-014-1338-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Full Kinetics and a Mechanistic Investigation of the Green Protocol for Synthesis of β-Aminoketone in the Presence of Saccharose as a Catalyst by a One-Pot Three-Component Reaction. ADVANCES IN CHEMICAL PHYSICS 2014. [DOI: 10.1155/2014/426749] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
For the first time, in a green protocol, an investigation of the kinetics and mechanism of the reaction between benzaldehyde 1, 4-chloroanilinne 2, and acetophenone 3 compounds in the presence of saccharose as a catalyst was performed for generating β-aminoketone. For determining the kinetic parameters, the reaction was monitored by using the UV/Vis spectrophotometry technique. The second order rate constant (k1) was automatically calculated by the standard equations contained within the program. In the studied temperature range, the second order rate constant (ln k1, ln k1/T) depended on reciprocal temperature that was in good consistent with Arrhenius and Eyring equations, respectively. These data provided the suitable plots for calculating the activation energy and parameters (Ea, ΔG‡, ΔS‡, and ΔH‡) of the reaction. Furthermore, useful information was obtained from studying the effects of solvent, concentration, and catalyst on the reaction mechanism. The results showed that the first step of the reaction mechanism is a rate determining step (RDS). The obtained experimental data and also the steady state assumption confirmed the proposed mechanism.
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6
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Full kinetics investigation of the formation reaction of phosphonate esters in the gas-phase: a theoretical study. J Mol Model 2014; 20:2103. [PMID: 24633765 DOI: 10.1007/s00894-014-2103-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2013] [Accepted: 12/02/2013] [Indexed: 10/25/2022]
Abstract
In the present work, the proposed multiple-mechanisms have been investigated theoretically for the reaction between triphenyl phosphite and dimethyl acetylenedicarboxylate in the presence of N-H acid such as aniline for generation of phosphonate esters using ab initio molecular orbital theory in gas phase. The profile of the potential energy surface was constructed at the HF/6-311G(d,p) level of theory. The kinetics of the gas phase reaction was studied by evaluating the reaction path of various mechanisms. Between 12 speculative proposed mechanisms {step₁, step₂ (with four possibilities), step₃ (with three possibilities), and step₄} only the third speculative mechanism was recognized as a desirable mechanism. Theoretical kinetics data involving k and E(a), activation (ΔG(‡), ΔS(‡) and ΔH(‡)), and thermodynamic parameters (ΔG°, ΔS° and ΔH°) were calculated for each step of the various mechanisms. Step₁ of the desirable mechanism was identified as the rate determining step. Comparison of the theoretical desirable mechanism with the rate law that has been previously obtained by UV spectrophotometry experiments indicated that the results are in good agreement.
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Khorassani SMH, Maghsoodlou MT, Ebrahimi A, Kazemian MA, Salari SS, Nasiri S. 1H NMR Kinetic Investigation of the Equilibrium between the Z- and E-Isomers in a Stable Phosphorus Ylide Involving 2-Mercaptobenzimidazole. PROGRESS IN REACTION KINETICS AND MECHANISM 2013. [DOI: 10.3184/146867813x13738207456613] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A kinetic investigation of the interchange process in the equilibrium between the Z- and E-isomers of a stable phosphorus ylide involving 2-mercaptobenzimidazole has been undertaken by the 1H NMR technique. Kinetic and activation parameters such as k–1, k1, ktotal, Ea1, Ea–1, Eatotal, Δ S#, Δ H# and Δ G# along with the thermodynamic parameters Ke, Δ H°, Δ G° and Δ S° were obtained from the experimental data for the forward and reverse reactions.
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Affiliation(s)
| | - Malek Taher Maghsoodlou
- Department of Chemistry, Faculty of Science, University of Sistan and Baluchestan, PO Box 98135-674, Zahedan, Iran
| | - Ali Ebrahimi
- Department of Chemistry, Faculty of Science, University of Sistan and Baluchestan, PO Box 98135-674, Zahedan, Iran
| | - Mohammad Amin Kazemian
- Department of Chemistry, Faculty of Science, University of Sistan and Baluchestan, PO Box 98135-674, Zahedan, Iran
| | - Sara Sameh Salari
- Department of Chemistry, Faculty of Science, University of Sistan and Baluchestan, PO Box 98135-674, Zahedan, Iran
| | - Shahin Nasiri
- Department of Chemistry, Faculty of Science, University of Sistan and Baluchestan, PO Box 98135-674, Zahedan, Iran
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Habibi-Khorassani SM, Maghsoodluo MT, Ebrahimi A, Ghalandarzehi Y, Ghodsi F, Asheri O. Mechanistic Study of the Formation of a Phosphonate Ester Containing 2-Fluoroaniline: Theoretical Assignment of the Resulting Isomer. PROGRESS IN REACTION KINETICS AND MECHANISM 2013. [DOI: 10.3184/146867813x13708865885287] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
For the first time, theoretical calculations have been employed for assignment of the most stable isomers ([(2S*, 3S*) or (2R*, 3R*)] and [(2S*, 3R*) or (2R*, 3S*)] of a phosphonate ester containing 2-fluoroaniline at HF/6-31G(d,p) and B3LYP/6-311++G(d,p) levels of theory. The results were showed that the compound with gauche arrangement and [(2S*, 3S*) or (2R*, 3R*)] configuration was more stable than the anti arrangement with [(2S*, 3R*) or (2R*, 3S*)] geometry. In addition, experimental 1H, 13C and 31P NMR data along with X-ray crystallographic data of the compound were consistent with the results obtained from theoretical calculations. Kinetic studies were performed on the reaction between triphenyl phosphite, dialkylacetylene dicarboxylates in the presence of an NH-acid, namely as 2-fluoroaniline (as a protic/nucleophilic reagent) for the generation of the compound with a gauche arrangement and [(2S*, 3S*) or (2R*, 3R*)] configuration. Kinetic data were obtained spectrophotometrically and a temperature study yielded activation parameters. A mechanistic scheme is proposed which fits all the kinetic data.
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Affiliation(s)
| | - Malek Taher Maghsoodluo
- Department of Chemistry, University of Sistan and Baluchestan, PO Box 98135-674, Zahedan, Iran
| | - Ali Ebrahimi
- Department of Chemistry, University of Sistan and Baluchestan, PO Box 98135-674, Zahedan, Iran
| | - Yunes Ghalandarzehi
- Department of Chemistry, University of Sistan and Baluchestan, PO Box 98135-674, Zahedan, Iran
| | - Fatemeh Ghodsi
- Department of Chemistry, University of Sistan and Baluchestan, PO Box 98135-674, Zahedan, Iran
| | - Osman Asheri
- Department of Chemistry, University of Sistan and Baluchestan, PO Box 98135-674, Zahedan, Iran
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Habibi-Khorassani SM, Maghsoodlou MT, Ebrahimi A, Mohammadi M, Shahraki M, Aghdaei E. Dynamic 1
H NMR investigation along with a theoretical study around the C-C and C = C bonds in a particular phosphorus ylide. J PHYS ORG CHEM 2013. [DOI: 10.1002/poc.3029] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
| | - Malek Taher Maghsoodlou
- Department of Chemistry; University of Sistan and Baluchestan; P. O. Box 98135-674 Zahedan Iran
| | - Ali Ebrahimi
- Department of Chemistry; University of Sistan and Baluchestan; P. O. Box 98135-674 Zahedan Iran
| | - Marzyeh Mohammadi
- Department of Chemistry; University of Sistan and Baluchestan; P. O. Box 98135-674 Zahedan Iran
| | - Mehdi Shahraki
- Department of Chemistry; University of Sistan and Baluchestan; P. O. Box 98135-674 Zahedan Iran
| | - Elham Aghdaei
- Department of Chemistry; University of Sistan and Baluchestan; P. O. Box 98135-674 Zahedan Iran
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Shahraki M, Khorassani SMH, Ebrahimi A, Maghsoodlou MT, Paknahad A. Theoretical, Kinetic and Mechanistic Studies of the Reaction between Dialkyl Acetylenedicarboxylates, Triphenylphosphine and Pyrrole in Organic Solvents. PROGRESS IN REACTION KINETICS AND MECHANISM 2012. [DOI: 10.3184/146867812x13481351806737] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The kinetics of the reaction between triphenylphosphine, dialkyl acetylenedicarboxylates and pyrrole in dry organic solvents at different temperatures have been studied spectrophotometrically. The observed overall second rate constant ( k2)for reaction decreases with decreasing solvent dielectric constant and media temperature; k2 follows the Arrhenius equation, and the overall reaction is first order in both the dialkyl acetylenedicarboxylate and triphenylphosphine concentrations. The proposed mechanism has been evaluated, and the activation parameters Δ G≠, Δ S≠ and Δ H≠ for the first, rate-determining step, as an elementary reaction have been determined on the basis of Eyring equation. In addition, the Z- and E-isomers have been optimized at HF and B3LYP levels with the 6-311++G** basis set; the more stable is the E-isomer, in agreement with experimental data. Furthermore, to better understand the intramolecular interactions, atoms in molecules (AIM) calculations and natural population analysis (NPA) methods have been carried out. The 1H, 13C, and 31P NMR data of these ylides are consistent with results obtained from theoretical calculations.
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Affiliation(s)
- Mehdi Shahraki
- Department of Chemistry, University of Sistan and Baluchestan, PO Box 98135-674, Zahedan, Iran
| | | | - Ali Ebrahimi
- Department of Chemistry, University of Sistan and Baluchestan, PO Box 98135-674, Zahedan, Iran
| | - Malek Taher Maghsoodlou
- Department of Chemistry, University of Sistan and Baluchestan, PO Box 98135-674, Zahedan, Iran
| | - Ali Paknahad
- Department of Chemistry, University of Sistan and Baluchestan, PO Box 98135-674, Zahedan, Iran
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Khorassani SMH, Maghsoodlou MT, Aghdaei E, Shahraki M. 1H Nmr Technique for Kinetic Investigation of Equilibrium between the Z- and E-Isomers in a Stable Phosphorus Ylide Involving a 2-Indolinone. PROGRESS IN REACTION KINETICS AND MECHANISM 2012. [DOI: 10.3184/146867812x13382029540569] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
For the first time, a kinetic investigation of the interchange process in the equilibrium between the Z- and E-isomers of a stable phosphorus ylide involving a 2-indolinone has been undertaken by the 1H NMR technique. Activation parameters such as k-1, k1, ktotal, Ea1, Ea-1, Eatotal, Δ S≠, Δ H≠ and Δ G≠ along with thermodynamic parameters such as Ke, Δ H°, Δ G° and Δ S° were obtained from experimental data for the forward and reverse reactions.
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Affiliation(s)
| | - Malek Taher Maghsoodlou
- Department of Chemistry, University of Sistan and Baluchestan, PO Box 98135-674, Zahedan, Iran
| | - Elham Aghdaei
- Department of Chemistry, University of Sistan and Baluchestan, PO Box 98135-674, Zahedan, Iran
| | - Mehdi Shahraki
- Department of Chemistry, University of Sistan and Baluchestan, PO Box 98135-674, Zahedan, Iran
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Rostamizadeh M, Maghsoodlou MT, Habibi-Khorassani SM, Hazeri N, Charati FR, Kazemian MA, Skelton BW, Makha M. X-ray structural analysis and theoretical studies of new phosphite-derived ylides. HETEROATOM CHEMISTRY 2011. [DOI: 10.1002/hc.20739] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Rostamizadeh M, Maghsoodlou MT, Habibi-Khorassani SM, Hazeri N, Sajadikhah SS, Charati FR, Kazemian MA, Skelton BW, Makha M. Molecular structure and theoretical studies of new stable phosphorus ylides derived from trialkyl phosphites. HETEROATOM CHEMISTRY 2010. [DOI: 10.1002/hc.20653] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Habibi Khorassani SM, Ebrahimi A, Maghsoodlou MT, Ghahghayi Z, Ghasempour H, Kazemian MA. NMR study and AIM analysis for the ylide rotamers from the reaction between triphenylphosphine and dialkyl acetylenedicarboxylates in the presence of 2-mercapto-1-methylimidazole. J Sulphur Chem 2010. [DOI: 10.1080/17415991003736249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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