Bond length dependence of the electric properties of lithium hydride

Coupled Hartree-Fock perturbation theory is applied in accurate ab initio calculations of molecular dipole moment, polarisabilities, first hyperpolarisabilities, electric field gradients and nuclear electric shielding tensors in LiH. Their dependence on internuclear separation is also analysed. According to the theoretical investigations, the molecule is characterised by a very high hyperpolarisability, very strong hyperpolarisability gradients and enhanced electronic shielding about the hydrogen nucleus.