Ab initio calculation of thermodynamic and kinetic quantities for 1,3-dipolar cycloadditions of benzonitrile oxide with various dipolarophiles
Yazarlar (3)
E Rajaian Islamic Azad University, Science And Research Branch, İran
Prof. Dr. Majıd MONAJJEMI Islamic Azad University, Science And Research Branch, İran
Mr Gholami
Islamic Azad University, Science And Research Branch, İran
Makale Türü Açık Erişim Özgün Makale (ESCI dergilerinde yayınlanan tam makale)
Dergi Adı Journal of Chemical Research Part S
Dergi ISSN 0308-2342
Makale Dili İngilizce Basım Tarihi 06-2002
Cilt / Sayı / Sayfa 0 / 6 / 279–281 DOI 10.3184/030823402103171979
Makale Linki http://www.scopus.com/inward/record.url?eid=2-s2.0-0036342603&partnerID=MN8TOARS
Özet
Ab initio molecular orbital calculations have been used to investigate the structures and transition states of 1,3-dipo- lar cycloadditions between benzonitrile oxide with ethylene, acrylonitrile, tetracyanoethylene and cyclopentene. Geometry optimisations and energy calculations were performed with RHF/6-31G*//RHF/6-31G* in each case. Calculation of vibrational frequencies permitted computation of the enthalpies, Gibbs free energies and rate constant of reactions. Cycloadditions of 1,3-dipolar benzonitrile oxide with electron-poor dipolarophiles have higher rates and lower thermodynamic stability than with other dipolarophiles.
Anahtar Kelimeler
1,3-Dipolar cycloaddition | Regioisomeric cycloadducts