Zinc(II) complexes with the tetradentate schiff base ligand N,N′-bis(1-pyridin-2-yl-ethylidene)propane-1,3-diamine: Synthesis and crystal structures

2013 ◽  
Vol 54 (3) ◽  
pp. 586-591 ◽  
Author(s):  
H. -Q. Xie ◽  
Y. Xiong ◽  
Y. -L. Dang
Keyword(s):  
Schiff Base ◽  
Crystal Structures ◽  
Schiff Base Ligand ◽  
Tetradentate Schiff Base

Synthesis and Crystal Structures of a New μ-Bis(tetradentate) Schiff Base Ligand and its Mononuclear Iron(III) Complex: Iron(III) Induced Imidazolidine Ring Hydrolysis of Binucleating Schiff Base Ligand

2005 ◽  
Vol 60 (5) ◽  
pp. 520-526 ◽  
Author(s):  
C. T. Zeyrek ◽  
A. Elmali ◽  
Y. Elerman
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Crystal Structures ◽  
Schiff Base Ligand ◽  
Minimum Energy ◽  
Mononuclear Iron ◽  
Tetradentate Schiff Base ◽  
Oxygen Donor ◽  
Distorted Octahedral Coordination Geometry ◽  
Distorted Octahedral

The μ-bis(tetradentate) ligand, [C27H26Cl3N4O4], H3L′, 1,3-bis[N-(5-chloro-2-hydroxybenzylidene)- 2-aminoethyl]-2-(5-chloro-2-hydroxyphenyl)imidazolidine and its mononuclear iron(III) complex, [Fe(L)](ClO4), L = N, N′-bis(5-chloro-2-hydroxybenzylidene)-triethylenetetramine have been synthesized and their crystal structures determined. Minimum energy conformations of the ligand were calculated (MOPAC, AM1) as a function of two torsion angles and the results compared with optimized crystal structure. The ligand (H3L′) reacts with Fe(ClO4)2 · 6H2O in aqueous methanol to form the mononuclear [Fe(L)](ClO4) complex with the imidazolidine ring cleaved by hydrolysis. The complex has an N4O2 donor atom set forming a distorted octahedral coordination geometry around the metal atom as established from a crystal structure determination. The terminal oxygen donor atoms occupy cis positions, and the remaining four nitrogen atoms (two cis amine and two trans imine) complete the coordination sphere.

Vanadium(III)-carbon and titanium(III)-carbon functionalities supported by a tetradentate Schiff base ligand

1990 ◽  
Vol 29 (20) ◽  
pp. 3991-3996 ◽  
Author(s):  
Jean Marie Rosset ◽  
Carlo Floriani ◽  
Marinella Mazzanti ◽  
Angiola Chiesi-Villa ◽  
Carlo Guastini
Keyword(s):  
Schiff Base ◽  
Schiff Base Ligand ◽  
Tetradentate Schiff Base
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