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CONTENTS<br />

xxi<br />

31.5 Symmetry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233<br />

31.6 Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233<br />

31.7 Choosing the ansatz and the level of approximation . . . . . . . . . . . . . . . 236<br />

31.8 CABS Singles correction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238<br />

31.9 Pair specific geminal exponents . . . . . . . . . . . . . . . . . . . . . . . . . . 238<br />

31.10CCSD(T)-F12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240<br />

31.11DF-LMP2-F12 calculations with local approximations . . . . . . . . . . . . . 240<br />

31.12Variables set by the F12 programs . . . . . . . . . . . . . . . . . . . . . . . . 242<br />

32 THE FULL CI PROGRAM 244<br />

32.1 Defining the orbitals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 244<br />

32.2 Occupied orbitals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 244<br />

32.3 Frozen-core orbitals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 244<br />

32.4 Defining the state symmetry . . . . . . . . . . . . . . . . . . . . . . . . . . . 244<br />

32.5 Printing options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245<br />

32.6 Interface to other programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245<br />

33 SYMMETRY-ADAPTED INTERMOLECULAR PERTURBATION THEORY 245<br />

33.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245<br />

33.2 First example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 246<br />

33.3 DFT-SAPT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 248<br />

33.4 High order terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 248<br />

33.5 Density fitting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 249<br />

33.6 SAPT with ECP’s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 249<br />

33.7 Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250<br />

33.7.1 HF-SAPT calculation of the H 2 O dimer using the δ(HF) correction . . 250<br />

33.7.2 DFT-SAPT calculation of the NeAr dimer using the δ(HF) correction . 252<br />

33.7.3 DF-DFT-SAPT calculation of the NeAr dimer using the δ(HF) correction 254<br />

33.8 Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 255<br />

34 PROPERTIES AND EXPECTATION VALUES 256<br />

34.1 The property program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 256<br />

34.1.1 Calling the property program (PROPERTY) . . . . . . . . . . . . . . . 256<br />

34.1.2 Expectation values (DENSITY) . . . . . . . . . . . . . . . . . . . . . 257<br />

34.1.3 Orbital analysis (ORBITAL) . . . . . . . . . . . . . . . . . . . . . . . 257<br />

34.1.4 Specification of one-electron operators . . . . . . . . . . . . . . . . . 257

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