From published data for the vibration-rotational and electronic spectra of the CH free radical we have extracted the parameters of the radial functions in the range 0.87<R/10^(-10) m< 1.61 to describe the potential energy, spin-orbital coupling, spin-rotational coupling and A-doubling effects (orbit-rotational coupling and spin uncoupling) in the ground electronic state X 2ΠΓ. These results we have used to predict the band parameters of the CD radical in the vibrational states 0≤v≤4 of the ground electronic state.