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Showing 2 results for Proton Transfer Compounds

Janet Soleimannejad, Sima Sedghiniya, Mina Nasibipour,
Volume 25, Issue 3 (9-2017)
Abstract

The compound of (Htmb)2[Ni(pydc)­2)].H2O (1) (In that tmb and pydc are 3,3¢,5,5¢-tetramethyl benzidine and pyridine -2,6- dicarboxylic acid, respectively) was synthesized via the proton transfer method and the structure was determined by single crystal X-ray diffraction. This compound crystalized in monoclinic crystal system and C2/c space group. In the asymmetry unit of compound 1, there are half molecule of the [Ni(pydc)­2)]2- anionic complex, one protonated molecule of 3,3¢,5,5¢-tetramethyl benzidine as a counter ion and half of an uncoordinated water molecule. Extensive intermolecular N-H…O and O-H…N, hydrogen bonds along with π… π and C-H …π interactions contribute in self-assembly and formation of a novel supramolecular structure.
Makan Etefagh, Janet Soleimannejad, Sima Sedghiniya, Klodiya Graiff,
Volume 27, Issue 2 (7-2019)
Abstract

A new supramolecular compound of adeninium bis(pyridine-2,6-dicarboxylate) Chromate(III) pyridine-2,6-dicarboxylic acid tetrahydrate (AdH+)[Cr(pydc)2](H2pydc).4H2O (1) (where Ad and H2pydc are adenine and pyridine-2,6-dicarboxylic acid, respectively) was synthesized via proton transfer method and its structure was determined using single crystal X-ray diffraction technique. This compound crystallizes in the orthorhombic crystal system with Pbca space group and the unit cell parameters are a = 14.180(14), b = 13.036(12),
c = 33.98(3) Å and α = β = γ = 90˚. The final R value is 0.053 for 2523 independent reflections. The asymmetric unit of compound 1 contains anionic, cationic and neutral species. The anionic part is a complex of Cr(III) with two coordinated pyridine-2,6-dicarboxylate groups and the cationic part is a protonated adenine. The neutral part has one molecule of pyridine-2,6-dicarboxylic acid and four hydration water molecules. The Cr(III)  atom in compound 1 adopts a distorted octahedral coordination geometry. All six coordination sites have been occupied by two deprotonated pyridine-2,6-dicarboxylate ligands. Non-covalent and intermolecular interactions i.e. Hydrogen bonds and C = O…π interactions are responsible for the self-assembled and regular structure of 1.

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