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- W1989469078 abstract "For a test set of 17 first-row small molecules, the equilibrium structures are calculated with Ornstein–Uhlenbeck diffusion quantum Monte Carlo simulations guiding by trial wave functions constructed from floating spherical Gaussian orbitals and spherical Gaussian geminals. To measure performance of the Monte Carlo calculations, the mean deviation, the mean absolute deviation, the maximum absolute deviation, and the standard deviation of Monte Carlo calculated equilibrium structures with respect to empirical equilibrium structures are given. This approach is found to yield results having a uniformly high quality, being consistent with empirical equilibrium structures and surpassing calculated values from the coupled cluster model with single, double, and noniterative triple excitations [CCSD(T)] with the basis sets of cc-pCVQZ and cc-pVQZ. The nonrelativistic equilibrium atomization energies are also presented to assess performance of the calculated methods. The mean absolute deviations regarding experimental atomization energy are 0.16 and 0.21 kcal/mol for the Monte Carlo and CCSD(T)/cc-pCV(56)Z calculations, respectively." @default.
- W1989469078 created "2016-06-24" @default.
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- W1989469078 date "2004-11-15" @default.
- W1989469078 modified "2023-09-27" @default.
- W1989469078 title "The accuracy of diffusion quantum Monte Carlo simulations in the determination of molecular equilibrium structures" @default.
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- W1989469078 doi "https://doi.org/10.1063/1.1809599" @default.
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