The structures and infrared spectra of pure carbon dioxide clusters, (CO2)(n)(n = 2-5), together with mixed clusters containing both carbon dioxide and fluoromethane analogues, CH4(CO2)(n), CH3F(CO2)(n), CH2F2(CO2)(n), CHF3(CO2)(n) (n = 1-5), have been studied using basin hopping combined with ab initio energies and gradients. Basin hopping searches in conjunction with density functional theory with empirical dispersion corrections and second order Moller-Plesset perturbation theory yield qualitatively similar minima for pure CO2. The structures and infrared spectra of the fluorinated methane containing clusters show a dominant factor is the attraction between the carbon atom of CO2 and the fluorine atoms. (C) 2015 Elsevier B.V. All rights reserved.