The main aims of this work were the synthesis and characterization iron(III) complexes with a ditopic ligand H2L consisting bis(salicylidene)isothiosemicarbazide moiety N2O2 binding site crown-ether (O6) moiety. A series high-spin complexes, i.e. [FeIIILClBa(CH3OH)(H2O)0.5(ZnCl4)] (1), [FeIIILCl] (2), [FeIIIL(N3)] (3) [(FeIIIL)2O] (4), synthesized. characterized by mass spectrometry, IR UV-vis ...

Poly- and mononuclear metal complexes of 2,3,11,12-bis[4-(10-aminodecylcarbonyl)]benzo-18- crown-6 (L) and Cu(II); Ni(II); Co(II) and Cr(III) have been synthesized and characterized by standard physico-chemical procedures. In the newly prepared complexes the crown moiety oxygen atoms of the macrocyclic host did not generally interact with metal ions, whereas the two amino groups of the ligand a...

The ternary complexes 18C6-4H20 -2 H N ( S 0 2Ph)2 (3) and 18C 6-2H 20 2 H N ( S 0 2C6H44 F ) 2 (4) were obtained by co-crystallization of 18-crown-6 (18C6) with the appropriate di(arenesulfonyl)amine from aqueous solutions and characterized by low-temperature X-ray diffraction. The crystal structures consist of monomeric formula units displaying crystallographic C, symmetry for 3 (monoclinic, ...

The 1,4-bis(3-guaiazulenylmethylium)benzene and 1,4-bis[1-(4,6,8-trimethylazulenylmethylium)]benzene dication salts were synthesized via an acid-catalyzed condensation/dehydration protocol with guaiazulene-terephthalaldehyde (2 : 1 ratio), and 4,6,8-trimethylazulene-terephthalaldehyde (2 : 1 ratio) respectively in one-pot processes. A similar condensation reaction with the parent azulene led to...

Abstract: Taking into account the unusual crystalline structures of 18-crown-6/peptides/water complexes, the links between their thermokinetic behaviour and the structural peculiarities are discussed. It has been found that the peptide chain lengthening leads to an increase in the temperature and activation energy of decomposition. The thermodynamics of complexation between small peptides and 1...