Neutron diffraction study of the HF adducts containing a hydrogen bond F-H center dot center dot center dot O

摘要

Single-crystal structures of HF adducts of acid salts CsH2PO3 . HF, KH2PO4 . HF, and CsH2PO4 . HF were determined by neutron diffraction using the Lane method. In the crystals, FIF molecules are connected to anions by means of new type of hydrogen bonds, F-H...O, which are significantly shorter (F...O distances 2.356-2.386(3) Angstrom) than strong O-H...O or O-H...F hydrogen bonds. The H-F distances in the structures of these adducts, 1.020-1.027(5) Angstrom, are compared with those in crystalline HF and hydrofluoride anions. (C) 2004 Elsevier Inc. All rights reserved.