A combined energetic and geometric study of a series of triel bond complexes involving haloborane salts has been carried out at the M06-2X/def2-QZVPD level of theory. We have used 1-(dihaloboranyl) pyridin-1-ium compounds Py+ BX2 (X = Cl, Br and I) as triel bond donors and Cl , Br , HCO2 , BF4 and ClO4 as electron donor moieties. In addition we have used Bader's theory of 'atoms in molecules' to further characterize the noncovalent interactions described herein. Finally, several examples were retrieved from the CSD (Cambridge Structural Database) in order to provide experimental support to the results presented in this work. (C) 2016 Elsevier B. V. All rights reserved.