Abstract
The standard enthalpy of formation, ΔfH°, of 2Π3/2 SH has been determined at converged levels of ab initio electronic structure theory, including high-order coupled cluster and full configuration interaction benchmarks. The atomic Gaussian basis sets employed include the (aug)-cc-p(wC)VnZ family with n = 3, 4, 5, and 6. Extrapolations to the complete one-particle basis set and the full configuration interaction limits, where appropriate, have been performed to reduce remaining computational errors. Additional improvements in the enthalpy of formation of 2Π SH were achieved by appending the valence-only treatment with core−valence correlation, scalar relativistic and spin−orbit effects, and the diagonal Born−Oppenheimer correction. The recommended values for Δf and Δf of 2Π SH are and kJ mol-1, respectively, corresponding to a recommended De = kJ mol-1. The corresponding enthalpy of formation of 2Π SD is Δf = kJ mol-1.
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