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Abstract: Fock-space multi-reference coupled cluster theory is an efficient method for electronic structure of nearly degenerate cases. However, it suffers from the intruder state problem for large model space. The intermediate Hamiltonian formulation eliminates intruder state problem and helps in the convergence of equations. In this paper we have implemented intermediate Hamiltonian approach in Fock-space coupled cluster method for the response properties. We test our method for the dipole moments of doublet radicals. We report dipole moments of CN, SF and NS radicals. [Copyright &y& Elsevier]

Highlights: [•] Extended coupled cluster method is used for all calculations. [•] The energy functional is truncated up to nth perturbation order. [•] Dipole moments for all the molecules are calculated at both equilibrium and stretched geometry. [Copyright &y& Elsevier]