Molecular structure of di-aryl-aldimines by multinuclear magnetic resonance and X-ray diffraction

Crystal structure of (N1E, N2E)-N1, N2-bis(5-hydroxymethyl-2-methyl- 3-oxopyridinio-4-ylmethylene)ethane-1,2-diamine-nickel(II) dihydrochloride, [Ni(C18H22N4O4)]Cl2

“…Asexpected, the molecule adopts two trans configuration about the C6=N1a nd C6A=N1Abonds. Their bond length, 1.293(3) Å,conforms to the expected value for anormal C=N p bond [5]. Asshown in the figure, bottom, each complex cation is linked with two Cl -anions through the N-H···Clhydrogen bonds, and also linked with other two Cl -anions through intermolecular O-H···Clhydrogen bonds in the crystal structure, forming aonedimensional chain structure.…”

Experimental and density functional studies on 4-(3,4-dihydroxybenzylideneamino)antipyrine, and 4-(2,3,4-trihydroxybenzylideneamino)antipyrine

“…Similar phenomena can be found in the APDs research field. Now, many crystal structures of APDs have been reported [6,[18][19][20][21][22][23][24][25][26][27][28][29][30][31][32]. It's very significative that new research work basing on the reliable crystal data should be further investigated on the APDs properties.…”

A dinuclear copper(II) complex and a zigzag chain iron(II) polymer based on the 4-antipyrine derived Schiff base ligands: The hydroxylation and redox occurred under the solvothermal conditions

“…As part of our interest in the coordination chemistry of the Schiff base derived from 4-aminoantipyrine, we noted that, during the reaction of Cu(Ac) 2 The ligand L1 and L2 were synthesized as reported previously by the base condensation of 4-aminoantipyrine with 2-hydroxybenzaldehyde and pyridine-3-carboxaldehyde, respectively, in a 1:1 molar ratio in ethanol at 80°C for 2 h [17,18]. Dark blue cubic crystals and red rod-shaped crystals for 1 and 2 were obtained under solvothermal conditions and characterized by spectroscopic data 1 as well as X-ray crystallography.…”