By performing MP2/aug-cc-pVTZ ab initio calculations for a large set of dimer systems possessing a RH hydridic bond involved in diverse types of intermolecular interactions (dihydrogen bonds, hydride halogen bonds, hydride hydrogen bonds, and charge-assisted hydride hydrogen bonds), we show that this is rather an elongation than a shortening that a hydride bond undergoes on interaction. Contrary to what might have been expected on the basis of studies in uniform electric field, this elongation is accompanied by a blue instead of red shift of the RH stretching vibration frequency. We propose that the “additional” elongation of the RH hydridic bond results from the significant charge outflow from the sigma bonding orbital of RH that weakens this bond. The more standard red shift obtained for stronger complexes is explained by means of the Hermansson's formula and the particularly strong electric field produced by the H-acceptor molecule. © 2014 Wiley Periodicals, Inc.