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Essentials of Computational Chemistry

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554 APPENDIX A<br />

PM3 Parameterized (NDDO) model 3<br />

PM3(tm) PM3 with a d orbital extension to transition metals<br />

PME Particle-mesh Ewald<br />

PMF Potential <strong>of</strong> mean force<br />

PMPn Projected Møller–Plesset theory <strong>of</strong> order n<br />

POS Points on a sphere<br />

PP Perfect pairing<br />

PPP Pariser–Parr–Pople<br />

PUHF Projected UHF<br />

PW Perdew–Wang (1991) exchange functional<br />

PW91 Perdew–Wang (1991) correlation functional<br />

QCISD Quadratic configuration interaction including singles and doubles<br />

QCISD(T) QCISD with perturbative estimate for connected triples<br />

QEq Charge equilibration<br />

QM Quantum mechanics<br />

QMHO Quantum mechanical harmonic oscillator<br />

QM/MM Quantum mechanics/molecular mechanics hybrid<br />

QSPR Quantitative structure–property relationship<br />

RAS Restricted active space<br />

r.d.f. Radial distribution function<br />

RESP Restrained ESP<br />

RHF Restricted Hartree–Fock<br />

RISM Reference interaction site model<br />

RMS Root mean square<br />

RMSD Root-mean-square deviation<br />

ROHF Restricted open-shell Hartree–Fock<br />

ROKS Restricted open-shell Kohn–Sham theory<br />

ROSS Restricted open-shell singlet density functional theory<br />

RPA Random-phase approximation<br />

RRKM Rice–Ramsperger–Kassel–Marcus<br />

S Slater exchange functional<br />

SAC Scaling all correction<br />

SAM1 Semi-ab initio method 1<br />

SAM1D SAM1 with d orbitals<br />

SAR Structure–activity relationship<br />

SASA Solvent-accessible surface area<br />

SCC-DFTB Self-consistent charge density functional tight-binding theory<br />

SCF Self-consistent field<br />

SCIPCM PCM with a liquid-solution-phase isodensity surface as the cavity<br />

surface<br />

SCRF Self-consistent reaction field<br />

SCS-MP3 Spin-component-scaled MP3<br />

SES Separable equilibrium solvation

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