Open AccessStructural, spectral and thermal properties of 2,2’-iminodipyridinium(+) trihydrogen pyromellitate
Author(s) -
Dejan Poleti,
Jelena Rogan,
Lidija Radovanović,
Marko V. Rodić
Publication year - 2014
Publication title -
journal of the serbian chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.227
H-Index - 45
eISSN - 1820-7421
pISSN - 0352-5139
DOI - 10.2298/jsc130706115p
Subject(s) - hydrogen bond , intramolecular force , chemistry , crystallography , protonation , crystal structure , ion , proton , infrared spectroscopy , molecule , stereochemistry , organic chemistry , physics , quantum mechanics
The title compound, (Hdipya)(H3pyr), where Hdipya is protonated 2,2’-dipyridilamine and H3pyr is monoanion of pyromellytic acid (H4pyr), was obtained from the reaction mixture containing Zn(II) ions, dipya, Na4pyr (the molar ratio 2 : 2 : 1) and HNO3. The products (micro- and single-crystalline) were characterized by X-ray structure determination, FT-IR spectroscopy and TG/DSC analysis. The most striking structural feature of (Hdipya)(H3pyr) are short inter- and extremely short intramolecular hydrogen bonds. These bonds mutually connect cations and anions making thin layers parallel to the crystallographic (223) plane. Also, quite unusual, linear proton-bound polymeric {H(H2pyr)-}n anions were identified in the structure. The results of crystal structure determination are compared with FT-IR and TG/DSC data. The low position of nas(COO) vibration at 1660 cm-1 is in accordance with strong hydrogen bonding. This value can be used as a measure of C=O bond order, which is calculated to be 1.81. [Projekat Ministarstva nauke Republike Srbije, br. 45007