Theoretical study of the reaction mechanism between triphenylphosphine with dimethyl acetylenedicarboxylates in the presence of 2-mercapto thiazoline

Authors : Mohammad ZAKARİANEZHAD, Batoul MAKİABADİ, Seyede Samira HOSSEİNİ, Elham ZEYDABADİ

Pages : 1-13

View : 12 | Download : 6

Publication Date : 2023-01-15

Article Type : Research Paper

Abstract :In this research, the mechanism of the reaction between triphenylphosphine R1 and dimethyl acetylenedicarboxylate R2 was investigated in the presence of NH-acid, such as 2-mercapto thiazoline R3 based on the quantum mechanical calculations. Theoretical studies performed for evaluation of the potential energy surfaces of all structures participated in the reaction mechanism. All structures were optimized at the B3LYP/6-311++ginsert ignore into journalissuearticles values(d,p); levels. The first step of the reaction was recognized as a rate-determining step in the reaction mechanism. To check the effect of solvent on the potential energy surfaces, condensed phase calculations in acetone were carried out with the polarizable continuum model insert ignore into journalissuearticles values(CPCM);. Finally, the natural bond orbital insert ignore into journalissuearticles values(NBO); method was applied for a better understanding of molecular interaction.
Keywords : NH acid, E and Z rotamers, Triphenylphosphine