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A dihydrogen phosphate anionic network as a host lattice for cations in 1‐methylpiperazine‐1,4‐diium bis(dihydrogen phosphate) and 2‐(pyridin‐2‐yl)pyridinium dihydrogen phosphate–orthophosphoric acid (1/1)
Author(s) -
Jagan R.,
Sathya D.,
Sivakumar K.
Publication year - 2015
Publication title -
acta crystallographica section c
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 17
ISSN - 2053-2296
DOI - 10.1107/s2053229615006518
Subject(s) - pyridinium , hydrogen bond , supramolecular chemistry , chemistry , phosphate , crystallography , salt (chemistry) , dihydrogen complex , cationic polymerization , inorganic chemistry , crystal structure , hydrogen , molecule , polymer chemistry , medicinal chemistry , organic chemistry , hydride
In the salt 1‐methylpiperazine‐1,4‐diium bis(dihydrogen phosphate), C 5 H 13 N 2 2+ ·2H 2 PO 4 − , (I), and the solvated salt 2‐(pyridin‐2‐yl)pyridinium dihydrogen phosphate–orthophosphoric acid (1/1), C 10 H 9 N 2 + ·H 2 PO 4 − ·H 3 PO 4 , (II), the formation of O—H...O and N—H...O hydrogen bonds between the dihydrogen phosphate (H 2 PO 4 − ) anions and the cations constructs a three‐ and two‐dimensional anionic–cationic network, respectively. In (I), the self‐assembly of H 2 PO 4 − anions forms a two‐dimensional pseudo‐honeycomb‐like supramolecular architecture along the (010) plane. 1‐Methylpiperazine‐1,4‐diium cations are trapped between the (010) anionic layers through three N—H...O hydrogen bonds. In solvated salt (II), the self‐assembly of H 2 PO 4 − anions forms a two‐dimensional supramolecular architecture with open channels projecting along the [001] direction. The 2‐(pyridin‐2‐yl)pyridinium cations are trapped between the open channels by N—H...O and C—H...O hydrogen bonds. From a study of previously reported structures, dihydrogen phosphate anions show a supramolecular flexibility depending on the nature of the cations. The dihydrogen phosphate anion may be suitable for the design of the host lattice for host–guest supramolecular systems.