Static electric properties of LiH: explicitly correlated coupled cluster calculations

Explicitly correlated MBPT-R12 and coupled cluster [up to CCSD(T)-R12] meth ods have been used in calculations of various (vibrationless) electrical pr operties for the LiH molecule, including the dipole and quadrupole moments, dipole and quadrupole polarizability tensors, dipole hyperpolarizability t ensors, and the second dipole hyperpolarizability tensors. Generally, with extension of the basis-set the R12 method did not lead to faster convergenc e for the calculated properties towards the basis limit. Nevertheless, R12 calculations serve as useful indicators to judge the reliability of the res ults, and substantially help in determining the accuracy. Results obtained with the 11s8p6d5f/9s8p6d5f basis and CCSD(T)-R12 calculated within this wo rk should be close to the basis set limit.