Temperature-dependent single-crystal neutron diffraction study of the strong OHN hydrogen bond in pyridinium 2,4-dinitrobenzoate.
The structure of pyridinium 2,4-dinitrobenzoate was studied by neutron diffraction at 300, 270, 240, 210, 180, 150, 120, 90, 60, and 30 K. With temperature change, the O...H bond length changes from 1.403(10) A at 300 K to 1.424(4) A at 30 K. The proton shifts in the hydrogen bridge toward the acceptor nitrogen atom. Temperature-dependent changes in the strong OHN hydrogen bond were analyzed by using both the neutron structure and the atom-in-molecule approach. The results are compared with those for other strong OHN hydrogen bonds.
Majerz
Irena
I
Faculty of Chemistry, University of Wroclaw, Joliot-Curie 14, PL 50-383 Wroclaw, Poland. maj@wchuwr.chem.uni.wroc.pl
Gutmann
Matthias J
MJ
D006860:Hydrogen Bonding; D033363:Neutron Diffraction; D009579:Nitrobenzoates / Q000737:chemistry*; D011522:Protons; D011726:Pyridinium Compounds / Q000737:chemistry*; D013696:Temperature; D013816:Thermodynamics
D009579:Nitrobenzoates; D011522:Protons; D011726:Pyridinium Compounds; C533175:pyridinium 2,4-dinitrobenzoate