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文獻(xiàn)中一段話看了好幾遍還不是很懂,希望有經(jīng)驗(yàn)的高手指教一下。小弟感激不盡。
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The ground-state geometry of pyrrole–water(PWn ). clusters was optimized at the restricted Hartree–Fock (RHF) level. Optimization of the 1πσ* excited-state geometry was performed using the complete-active-space self-consistent-field (CASSCF) method. The standard split-valence double zeta Gaussian basis set 6-31G** with polarization functions on all atoms was used. For the excited-state optimizations this basis set was supplemented with a set of s and p diffuse Gaussian functions localized at a floating center. The nuclear geometry of the cluster in the 1πσ*) state (including the position of the floating center) and the exponent of the s and p diffuse functions were optimized in a self-consistent manner until the energy change was below the threshold for optimization. A similar technique has been used in calculations of the dipole bound anions of molecular complexes.The active space for the CASSCF calculations includes all π valence orbitals of the pyrrole ring and the σ* orbital. The active space thus correlates six electrons in six orbitals. Cs symmetry of the PWn Cluster was imposed in the course of the geometry optimization. Within the Cs point group the wave function of the 1πσ* state transforms according to the non-totally symmetric A'' presentation and thus cannot collapse to the ground state. The geometry optimizations were performed with the GAMESS package. To incorporate electron-correlation effects for the excited states, single-point calculations at optimized geometries along the reaction path were performed with the aid of the CASPT2 method(second-order perturbation theory based on the CASSCF reference). The CASPT2 calculations were performed with the MOLCAS-4 package , using the ANO-L basis set of split-valence doublezeta quality with polarization functions on all atoms and diffuse s and p Gaussian functions at the floating center. 紅色字體到底是什么意思?the exponent of the s and p diffuse functions 這個(gè)指數(shù)是指什么。 |
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beefly: 您好!能不能麻煩你跟我說一下你對這段話的大概理解啊。我看了說明書,對這篇文獻(xiàn)中的紅色字體部分還是不太懂。我自己對這篇文獻(xiàn)的理解是采用一個(gè)Bq(空原子),在Bq上添加了彌散函數(shù)。 我的輸入格式如下:你覺得可以嗎? %chk=/home/kevin/2py/pyrrole/pyrrole-2h2o-5.chk %mem=120MW %nproc=2 #p opt casscf(2,2,nroot=2)/gen scfcyc=200 scfcon=5 guess=read iop(2/16=2) Title Card Required 0 1 C C 1 B1 C 2 B2 1 A1 C 3 B3 2 A2 1 D1 N 4 B4 3 A3 2 D2 H 5 B5 4 A4 3 D3 H 1 B6 5 A5 4 D4 H 2 B7 1 A6 5 D5 H 3 B8 2 A7 1 D6 H 4 B9 3 A8 2 D7 H 5 B10 4 A9 3 D8 O 5 B11 4 A10 3 D9 H 12 B12 5 A11 4 D10 H 4 B13 3 A12 2 D11 O 4 B14 3 A13 2 D12 H 15 B15 4 A14 3 D13 Bq 12 B16 5 A15 4 D14 B1 1.40129083 B2 1.43475975 B3 1.40161749 B4 1.39141765 B5 0.98398381 B6 1.08903808 B7 1.08475289 B8 1.08444796 B9 1.08922779 B10 3.99463179 B11 3.38811506 B12 0.95161917 B13 4.02466221 B14 3.43671240 B15 0.97058604 B16 1.20538536 A1 107.17528048 A2 107.20363479 A3 108.39629274 A4 125.59202429 A5 121.49668673 A6 126.43705968 A7 126.36679878 A8 130.12390032 A9 118.26623522 A10 124.21229592 A11 123.63943243 A12 150.96424551 A13 148.43664181 A14 121.08950356 A15 61.76902118 D1 0.00000000 D2 0.00000000 D3 180.00000000 D4 180.00000000 D5 180.00000000 D6 180.00000000 D7 180.00000000 D8 168.55418017 D9 180.00000000 D10 61.79278004 D11 156.77675740 D12 180.00000000 D13 112.07330391 D14 0.00000000 C N H O 0 6-31g** **** Bq 0 6-31g**+sp **** 主要問題在于 Bq 0 6-31g**+sp **** 對不對?謝謝您 |
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