Synthesis and crystal structures of hydrogen monofluorophosphates with N-containing organic cations. The influence of fluorine on their hydrogen bond systems

摘要

The synthesis and crystal structures of guanidinium monofluorophosphate and hydrogen monofluorophosphates with the following cations: piperazinium, di- and triethylammonium, guanidinium, and dimethyluronium, are described and discussed. The structures of the acid salts consist of hydrogen-bonded HPO3F tetrahedra, which form infinite chains or cyclic dimers. The organic cations link these units together. All of the hydrogen bond systems observed consist of short O-H...O and longer N-H...O bonds. No O-H...F or N-H...F bonds were found. The F atom avoids hydrogen acceptor positions in the structures. The thermal behavior of [NHEt3]HPO3F was also studied. [References: 25]