Journal
JOURNAL OF CHEMICAL PHYSICS
Volume 116, Issue 12, Pages 4773-4776Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1462612
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An implementation of analytic second derivatives for the coupled-cluster singles, doubles, and triples (CCSDT) model is reported and applied to the calculation of nuclear magnetic shielding constants of BH, HF, CO, N-2, N2O, and O-3. The CCSDT calculations yield further evidence for the high accuracy provided by chemical shift calculations employing the coupled-cluster singles, doubles (CCSD) approach augmented by a perturbative triples correction [CCSD(T)]. (C) 2002 American Institute of Physics.
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