Next: 7.8.4 DFT frequency calculation Up: 7.8 Using default Procedures Previous: 7.8.2 SA-CASSCF and MRCI

7.8.3 MP2 geometry optimization

The following input performs an MP2 geometry optimization for water.

Input: h2o_optmp2.com

Output: h2o_optmp2.out

At the end of the output the following summary of results is printed.

 RESULTS FOR BASIS=VTZ 

 METHOD  STATE     S       ENERGY    DIPX  DIPY     DIPZ
 MP2(D)    1.1   0.0   -76.31865774   0.0   0.0   0.76152434

 R / ANG                =         0.95906396
 THETA / DEGREE         =       103.51638614

The next calculation optimizes the geometry at the MP2 level and subsequently performs MP4 and CCSD(T) calculations at the optimized geometry.

Input: h2o_optmp2_runccsdt.com

Output: h2o_optmp2_runccsdt.out

At the end of the output the following summary of results is printed.

 RESULTS FOR BASIS=VTZ 

 METHOD     STATE     S       ENERGY
 MP2(D)       1.1   0.0   -76.31865774
 MP2          1.1   0.0   -76.31865774
 MP3          1.1   0.0   -76.32273584
 MP4(SDQ)     1.1   0.0   -76.32484084
 MP4(SDTQ)    1.1   0.0   -76.33305159
 MP2          1.1   0.0   -76.31865774
 CCSD         1.1   0.0   -76.32454712
 CCSD(T)      1.1   0.0   -76.33221602
 CCSD[T]      1.1   0.0   -76.33240959

The MP2 energy appears repeatedly, since it is computed in the MP2, MP4, and CCSD(T) calculations.



P.J. Knowles and H.-J. Werner
molpro@tc.bham.ac.uk
Jan 15, 2002