SEARCH Articles Figures Tables Activation Energy and Reaction Orders Additivity of the second-order dispersion energy Alternative Transformation for First-Order Energy Analysis of the first-order perturbation energy Apparent activation energies and kinetic isotope effects using the reaction order approach Approximation methods second-order energy) Averaged second-order energies Bond dissociation energy order Bond, energy order Contents 1 First-order Energy Surfaces Correlation energy relativistic, second order Correlation energy second order Correlation energy third order Direct DKH Transformation of First-Order Energy Energy Order of Dimer Exciton States Energy Profile and Rate Law for SN2 Reactions Reaction Order Energy eigenfunctions zero-order Energy eigenvalues zero-order Energy first order Energy first-order effect Energy sources extract order from Energy third-order terms Energy to first order Energy zero order Energy-driven nematic ordering Entropy- and Energy-Driven Nematic Ordering Epstein-Nesbet second-order energy Expanded Energy Corrections up to Second Order Federal Energy Regulatory Commission Order Fifth Order Energy Components First order self energy First-order correction to energy First-order electrostatic energy First-order energy correction First-order energy minimisation First-order perturbation energy Fourth Order Energy Components Fourth-order contributions to the correlation energy Fourth-order energy Fourth-order energy computational scheme Fourth-order energy from coupled-cluster doubles Gibbs free energy first-order transitions Higher Order Correlation Energy Components Higher Order Energy Components Hydrogen molecule second-order energy Hydrogen molecule third-order energy Intermolecular perturbation first-order energy Intermolecular perturbation second-order energy Many-electron atoms general energy ordering Metal clusters second-order energy difference Moller-Plesset perturbation theory second-order energy derivatives NMR Parameters Defined as Second-Order Energy Perturbations Nitrogen second-order correlation energy Non-expanded Energy Corrections up to Second Order Operators first order reduced, factoring energy Order Parameter, Phase Transition, and Free Energies Order of M.O. energies Order of orbital energy levels in crystal field theory Ordering models vibrational energy effects Ordering of energy levels Perturbation energy, second-order Potential energy first-order saddle point Potential energy surface first-order derivatives Potential energy surface second-order derivatives Potential-energy surfaces first order Potential-energy surfaces zero order Rayleigh-Schrodinger perturbation theory third-order energy Rayleigh-Schrodinger perturbation theory, second order energy Second order energy expression Second-order correction to energy Second-order correlation energy for Second-order energy Second-order energy correction Second-order quasiparticle electron energies Second-order self-energy Second-order stark energy Second-order vibrational perturbation theory energy levels Self energy zeroth-order degenerate states Self-energy third-order The Ground-State Energy to First-Order of Heliumlike Systems The Higher-Order Correlation Energy Third-order contributions to the correlation energy Water second-order correlation energy Zero order reaction point energy Zeroth-order energy Zeroth-order regular approximation energies/results