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zhulty

铁杆木虫 (职业作家)

竹林听雨

[求助] gaussian高手请进

想用gaussian模拟一个分子的红外,分子如图,不知单电子数和自旋多重度是否写的正确,出现如下错误求解释
命令如下:
%chk=F:\3.chk
# opt freq hf/3-21g geom=connectivity

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1 2
最后结果失败如下:
Restarting incremental Fock formation.
Restarting incremental Fock formation.
Restarting incremental Fock formation.
Restarting incremental Fock formation.
Restarting incremental Fock formation.
Restarting incremental Fock formation.
>>>>>>>>>> Convergence criterion not met.
SCF Done:  E(UHF) =  -5563.94060881     A.U. after  129 cycles
             Convg  =    0.1294D-04             -V/T =  1.9970
             S**2   =   0.7503
Annihilation of the first spin contaminant:
S**2 before annihilation     0.7503,   after     0.7500
Convergence failure -- run terminated.
Error termination via Lnk1e in d:\G03W\l502.exe at Tue Jan 29 21:33:37 2013.
Job cpu time:  0 days  7 hours  9 minutes 18.0 seconds.
File lengths (MBytes):  RWF=     51 Int=      0 D2E=      0 Chk=      7 Scr=      1

1.jpg
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xjyuefan

铁杆木虫 (正式写手)

【答案】应助回帖

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感谢参与,应助指数 +1
小红豆: 金币+3, 感谢回复 2013-01-30 19:40:05
优化时可能你是不加那个溴阴离子,那么电荷为1,自旋多重度应该是1.因为其为一正常有机物,不存在未成对电子。如果有未成对电子,那自旋多重度也应该为3,不应该为2.
2楼2013-01-30 19:13:05
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