Neutron diffraction study of the HF adducts containing a hydrogen bond F–H⋯O

• Published in: Journal of solid state chemistry Vol. 177; no. 9; pp. 3224 - 3228
• Main Authors: Troyanov, S.I., Morozov, I.V., Snigireva, E.M., Ling, C.D., Kemnitz, E.
• Format: Journal Article
• Language: English
• Published: Elsevier Inc 01-09-2004
• Subjects: Hydrogen bond; Hydrogen fluoride; Neutron diffraction; Neutron diffraction; Hydrogen fluoride; Hydrogen bond
• ISSN: 0022-4596; 1095-726X
• DOI: 10.1016/j.jssc.2004.06.003

Single-crystal structures of HF adducts of acid salts CsH
2PO
3·HF, KH
2PO
4·HF, and CsH
2PO
4·HF were determined by neutron diffraction using the Laue method. In the crystals, HF 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)
Å) 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)
Å, are compared with those in crystalline HF and hydrofluoride anions.