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×î½ü×öµÄÒ»¸öÌåϵ×ÔÐýÎÛȾ´óµÄ¾ªÈË£¬Çë½Ì¸ßÊÖ ÊäÈ룺# b3lyp/6-311+g(2d,p) pop=NBO scf=(maxcycle=500, tight) Charge = 0 Multiplicity = 2 Êä³ö£º SCF Done: E(UB+HF-LYP) = -5204.25052453 A.U. after 32 cycles Convg = 0.6735D-08 -V/T = 2.0016 S**2 = 1.9323 Annihilation of the first spin contaminant: S**2 before annihilation 1.9323, after 2.5168 ¸ß˹¹«Ë¾»ØÐÅ£ºI agree that this is a large value for S**2 but this really is a statement about system rather than something you can control. 1) have you check the stability of the wavefunction? You have a number of negative eigenvalues, run STABLE=Opt Guess=Read 2) are you sure that a doublet is the lowest energy state, a large value for S**2 says the alpha and beta orbitals are different, this can occur if you have the highest beta occupied different from the alpha orbitals where it may be unoccupied. Again stability may switch this or higher spin states may be more stable. Try both of these. ¿ÉÎÒ×öÁËSTABLE=Opt ºó·¢ÏÖ²¨º¯ÊýÊÇÎȶ¨µÄ Eigenvectors of the stability matrix: Eigenvector 1: ?Spin -A' Eigenvalue= 0.0295043 111A ->112A 0.93202 110B ->111B -0.18620 110B ->113B -0.10726 The wavefunction is stable under the perturbations considered. The wavefunction is already stable. The wavefunction is already stable. ¶øÇÒÎÒÒ²×÷ÁËËÄÖØÌ¬£¬·¢ÏÖ¶þÖØÌ¬±ÈËÄÖØÌ¬µÄÄÜÁ¿µÍ£¬ÏÖÔÚ²»ÖªµÀ¸ÃÔõô°ìÁË£¬»¹Çë¸ßÊÖÖ¸µã£¬¡¡Ð»Ð»£¡ |
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