作者: Laia Torres , Miquel Moreno , José M. Lluch
DOI: 10.1016/S0009-2614(01)00449-3
关键词: Stationary point 、 Ab initio quantum chemistry methods 、 Potential energy 、 Quantum tunnelling 、 Discretization 、 Computational chemistry 、 Bond length 、 Proton 、 Molecular physics 、 Molecular geometry 、 Chemistry
摘要: Abstract DFT electronic calculations are performed for the double proton transfer in bicyclic oxalamidines 2,2 ′ -bis-(3,4,5,6-tetrahydro-1,3-diazine) (OA6) and -bis-(4,5,6,7-tetrahydro-1,3-diazepine) (OA7). Bidimensional potential energy surfaces retaining characteristics of stationary points located whole built to calculate vibrational levels through discrete variable representation (DVR) method. Zero-point tunneling splittings similar both systems but a given there much less doublets available OA6, this being key factor responsible different temperature dependence rate two systems.