The structure of 1,5-bis(salicylidene)carbonohydrazide monohydrate

Coordinating and supramolecular prospects of unsymmetrically substituted carbohydrazides

Unsymmetrically substituted carbohydrazides serve as multifunctional ligands, practicing their chelating and supramolecular roles with cis-dioxomolybdenum(vi) cationic core and the Lindqvist anion.

Synthesis, Characterization and Crystal Structure of Bis-(2-Hydroxybenzaldehyde)Diaminoguanizone

The new ligand, bis(2-hydroxybenzaldehyde)diaminoguanizone (1) has been synthesized and characterized by elemental analysis, IR and 1H NMR spectroscopies. The crystal structure of the compound was determined by X-ray diffraction. The ligand C15H15N5O2·C2H5OH crystallizes in the monoclinic space group P21/c with unit cell parameters a = 8.9102(3), b = 10.0357(3), c = 19.7618(6) Å, β = 98.385(2)°, Z = 4, V = 1748.21(9) Å3, R1 = 0.040. The amino form of the ligand adopts a planar conformation stabilized by two intramolecular hydrogen bonds of the type O–H···N, in which the H atoms of the central amino group are directed to the lone-pair regions of the azomethine nitrogen atoms.

N-[1-(2-Hydroxy-phen-yl)ethyl-idene]-N-(1H-indol-3-ylmethyl-ene)carbonic dihydrazide

In the crystal structure of the title compound {alternative name: 1-[1-(2-hydroxy­phen­yl)ethyl­ideneamino]-3-(1H-indol-3-ylmethyl­eneamino)urea}, C₁₈H₁₇N₅O₂, the planar indole component is twisted at an angle of 63.7 (10)° with respect to the rest of the mol­ecule. This compound is one of a series being studied for biological activity. The hydr­oxy groups are involved in both intra­molecular (O—H⋯N) and inter­molecular (N—H⋯O) hydrogen bonds.