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时间:2020-03-30
《昆明理工大学计算化学上机实验三-利用Gaussian对分子几何构型进行优化.doc》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、昆明理工大学理学院上机实验报告课程名称:计算化学实验名称:利用Gaussian对分子几何构型进行优化专业班级:应化10级学生姓名:龙玉姣学号:2010111041201.写出两种丁二烯的分子输入内坐标,其中C=C:1.35Å,C-C:1.50Å,C-H:1.09Å,HCC键角:120°,CCC键角:120°,二面角根据右手规则判断,通过Gaussian进行单点能量计算,从结果文件中给出两个结构的对称性和能量值,并通过Gaussianview或ChemOffice将输入的结构图形以球棍形式列出。CC1R1H1R32AH1R32A3180.0H2R31A40.
2、0C2R21A4180.0C6R12A10.0H6R32A1180.0H7R36A2180.0H7R36A20.0CC1R1H1R32AH1R32A3180.0H2R31A40.0C2R21A4180.0C6R12A1180.0H6R32A10.0H7R36A20.0H7R36A2180.0R1=1.35R2=1.50R3=1.09A=120.0R1=1.35R2=1.50R3=1.09A=120.0顺丁二烯:单点能量SCFDone:E(RHF)=-154.913916052Hartrees结构的对称性:FullpointgroupC2V通过Gaussia
3、nview将输入的结构图形以球棍形式列出:反丁二烯:单点能量SCFDone:E(RHF)=-154.913916052Hartrees结构的对称性:FullpointgroupC2H通过Gaussianview将输入的结构图形以球棍形式列出:1.对上述顺反丁二烯分子分别采用HF和B3LYP方法进行结构优化,并对其进行能量、布居分析计算。1)给出两种方法优化后的结构图;HF方法优化后的结构图:顺丁二烯:反丁二烯:B3LYP方法优化后的结构图:顺丁二烯:反丁二烯:1)列表给出两种方法优化后的结构数据(键长、键角、二面角)以及单点能量值,比较哪种结构更为稳定;H
4、F:顺丁二烯(键长、键角、二面角):SymbolNANBNCBondAngleDihedralCC11.3499997H121.0900003120.0000019H1231.09120.0000063180H2141.0900003120.00000190C2141.5120.0000063180C6211.3499997120.00000630H6211.0900003119.9999919180H7621.09120.0000063180H7621.0900003120.00000190单点能量值:SCFDone:E(RHF)=-154.902034
5、489Hartrees反丁二烯:(键长、键角、二面角):SymbolNANBNCBondAngleDihedralCC11.35H121.0900003119.9999919H1231.0900003119.9999919180H2131.0900003119.9999919180C2131.4999999120.0000020C6211.35120.000002180H6211.0900003120.00000610H7621.0900003119.99999190H7621.0900003119.9999919180单点能量值:SCFDone:E(RH
6、F)=-154.919508560HartreesB3LYP顺丁二烯(键长、键角、二面角):SymbolNANBNCBondAngleDihedralCC11.3499997H121.0900003120.0000019H1231.09120.0000063180H2141.0900003120.00000190C2141.5120.0000063180C6211.3499997120.00000630H6211.0900003119.9999919180H7621.09120.0000063180H7621.0900003120.00000190单点能量
7、值:SCFDone:E(RB3LYP)=-155.977959921Hartrees反丁二烯:(键长、键角、二面角):SymbolNANBNCBondAngleDihedralCC11.35H121.0900003119.9999919H1231.0900003119.9999919180H2131.0900003119.9999919180C2131.4999999120.0000020C6211.35120.000002180H6211.0900003120.00000610H7621.0900003119.99999190H7621.09000031
8、19.9999919180单点能量值:SCFDone:E(RB3L
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