We report results of theoretical studies of dipole-bound anion formation reactions in collisions of polar molecules CH3NO2, CH3CN, and C3H4O3 with Rydberg atoms Cs(ns), Xe(nf), and Rb(nl) (l = 0, 3, and n - 1). It is shown that the inclusion of the long-range interaction effects into the calculations of the Rydberg-covalent-ionic coupling terms is crucial for a reliable quantitative description of such processes. A particular attention is paid to the comparison of the results obtained with the calculations performed using previous models and with the experiment. (C) 2013 Elsevier B.V. All rights reserved.