标题: 能否在turbomole软件下使用CCSD或CCSD(T)优化结构? [打印本页] 作者Author: xujian 时间: 2016-7-27 15:44 标题: 能否在turbomole软件下使用CCSD或CCSD(T)优化结构? 在turbomole的教程关于CCSD和CCSD(T)部分有这么两段话,是不是说CCSD和CCSD(T)只能计算单点能,而不能用来结构的优化?Closed-shell (RHF), unrestricted (UHF) or single determinant restricted (ROHF) open-shell reference wavefunctions can be used for CCSD and CCSD(T), but no gradients or properties are (yet) available for these wavefunction models. As presently no gradients are available, only single–point calculations are possible.