Erratum to “Synthesis of new tripodal ligand: N,N-bis[(1,5-dimethylpyrazol-3-yl)methyl]benzylamine. Catecholase activity of two series of tripodal ligands with some copper(II) salts” [Catal. Commun. 8 (4) (2007) 707–712]

2008 ◽  
Vol 9 (4) ◽  
pp. 556
Author(s):  
Ibrahim Bouabdallah ◽  
Rachid Touzani ◽  
Ismail Zidane ◽  
Abdelkrim Ramdani
Keyword(s):  
Tripodal Ligands ◽  
Tripodal Ligand ◽  
Catecholase Activity

scholarly journals A novel 1,3,5-triaminocyclohexane-based tripodal ligand forms a unique tetra(pyrazolate)-bridged tricopper(ii) core: solution equilibrium, structure and catecholase activity

2016 ◽  
Vol 45 (38) ◽  
pp. 14998-15012 ◽  
Author(s):  
Attila Szorcsik ◽  
Ferenc Matyuska ◽  
Attila Bényei ◽  
Nóra V. Nagy ◽  
Róbert K. Szilágyi ◽  
...  
Keyword(s):  
Equilibrium Structure ◽  
Low Ph ◽  
Ph Optimum ◽  
Tripodal Ligand ◽  
Solution Equilibrium ◽  
Catecholase Activity ◽  
Core Solution

A polydentate tripodal ligand forms a series of tricopper(ii) complexes, that feature unique pyrazolate-bridged linear core. The Cu3H−3L2 complex is an efficient catecholase mimic with a surprisingly low pH optimum at pH = 5.6.

Two New Tripodal Ligands with an N4S3 Donor Set. The X-Ray Crystal Structure of 4,4′,4′′- [Nitrilotris(ethyleneimino)]tris(pent-3-ene-2-thione).

1997 ◽  
Vol 50 (4) ◽  
pp. 373 ◽  
Author(s):  
Penelope J. Brothers ◽  
Clifton E. F. Rickard ◽  
Claire M. Strange ◽  
David C. Ware
Keyword(s):  
Crystal Structure ◽  
Donor Ligands ◽  
Tripodal Ligands ◽  
Tripodal Ligand ◽  
X Ray ◽  
New Compounds

Two new compounds with a tripodal ligand architecture and with the potential to act as heptadentate N4S3 donor ligands are reported. H3S3trac (4,4′,4′′-[nitrilotris(ethyleneimino)]tris(pent-3-ene-2-thione)) is prepared by the reaction of acetylacetone with tren (tris(2-aminoethyl)amine), followed by treatment with P2S5. H3trimda (3,3′,3′′-[nitrilotris(ethyleneimino)]tris(2-phenylpropenethial)) is prepared by the reaction of 4-phenyl-1,2-dithiolium perchlorate with tren. A crystal structure of H3S3trac shows it to be monoclinic, P 21/c, a 11·443(7), b 11·7757(14), c 19·285(3) Å, β 106·68(2)°, Z 4, R 0·0454, ωR2 0·1108 for 1618 observed reflections (I > 3σ(I)). 1H and 13C { 1H} n.m.r. data for H3S3trac and H3trimda, and the crystal structure of H3S3trac are consistent with the compounds existing in the enamino thione tautomer.

scholarly journals Spin Cross-Over (SCO) Anionic Fe(II) Complexes Based on the Tripodal Ligand Tris(2-pyridyl)ethoxymethane

2020 ◽  
Vol 6 (2) ◽  
pp. 26
Author(s):  
Emmelyne Cuza ◽  
Samia Benmansour ◽  
Nathalie Cosquer ◽  
Françoise Conan ◽  
Sébastien Pillet ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Tripodal Ligands ◽  
Magnetic Studies ◽  
Tripodal Ligand ◽  
Distorted Octahedral Environment ◽  
Mononuclear Complexes ◽  
Octahedral Environment ◽  
Distorted Octahedral ◽  
One Step ◽  
Step Transition

Reactions of Fe(II) with the tripodal chelating ligand 1,1,1-tris(2-pyridyl)ethoxymethane (py3C-OEt) and (NCE)− co-ligands (E = S, Se, BH3) give a series of mononuclear complexes formulated as [Fe(py3C-OEt)2][Fe(py3C-OEt)(NCE)3]2·2CH3CN, with E = S (1) and BH3 (2). These compounds are the first Fe(II) spin cross-over (SCO) complexes based on the tripodal ligand tris(2-pyridyl)ethoxymethane and on the versatile co-ligands (NCS)− and (NCBH3)−. The crystal structure reveals discrete monomeric isomorph structures formed by a cationic [Fe(py3C-OEt)2]2+ complex and by two equivalent anionic [Fe(py3C-OEt)(NCE)3]− complexes. In the cations the Fe(II) is facially coordinated by two py3C-OEt tripodal ligands whereas in the anion the three nitrogen atoms of the tripodal ligand are facially coordinated and the N-donor atoms of the three (NCE)− co-ligands occupy the remaining three positions to complete the distorted octahedral environment of the Fe(II) centre. The magnetic studies show the presence of gradual SCO for both complexes: A one-step transition around 205 K for 1 and a two-step transition for compound 2, centered around 245 K and 380 K.

Tetranuclear Copper and Mononuclear Nickel Complex of the Schiff Base of (3Z)-3-Hydrazonobutan-2-One Oxime with Different Aromatic Carbonyl Compounds: Synthesis, Single Crystal X-Ray Structure, Catecholase Activity, Phenoxazinone Synthase Activity, Catalytic Study for the Homocoupling of Benzyl Amines

2019 ◽  
Author(s):  
Swaraj Sengupta ◽  
Sahanwaj Khan ◽  
Shyamal K. Chattopadhyay ◽  
Indrani Banerjee ◽  
Tarun K. Panda ◽  
...  
Keyword(s):  
Schiff Base ◽  
Single Crystal ◽  
Copper Complex ◽  
Carbonyl Compounds ◽  
Nickel Complex ◽  
Schiff Base Ligands ◽  
X Ray ◽  
Phenoxazinone Synthase ◽  
Catecholase Activity ◽  
Aromatic Carbonyl Compounds

Synthesis and characterisation of one trinuclear copper complex, ([Cu<sub>3</sub>L<sub>3</sub>O]ClO<sub>4</sub>) (<b>1</b>) and one nickel complex ([Ni(L'H)<sub>2</sub>(dmso)<sub>2</sub>](ClO<sub>4</sub>)<sub>2</sub>) (<b>2</b>) with Schiff base ligands: (3Z)-3-((Z)-(1-(thiophen-2-yl)ethylidene)hydrazono)butan-2-one oxime (LH) and 1-(pyridin-2-yl)ethylidene)hydrazono)butan-2-one oxime (L<sup>'</sup>H). <b>1</b> shows high catecholase activity and has also been tested as a catalyst for the synthesis of benzylimine. <b>2 </b> shows phenoxazinone synthase activity.

A New C-anionic Tripodal Ligand, 2-{Bis(benzothiazolyl)(methoxy)methyl}phenyl and its Bismuth Complexes

2021 ◽  
Author(s):  
Shigeru Shimada ◽  
Shuang-Feng Yin ◽  
Ming Bao
Keyword(s):  
Tripodal Ligand ◽  
Anionic Ligand ◽  
Methyl Phenyl

A new tripodal C-anionic ligand, 2-{bis(benzothiazolyl)(methoxy)methyl}phenyl (L), was stably generated by the reaction of the ligand precursor (L'), the corresponding bromide (2-BrC6H4)(MeO)C(C7H4NS)2 (C7H4NS = 2-benzothiazolyl), with nBuLi at –104 ºC...

Formation of an Iron(III) Oxo Cubane Core Fe4(μ4-O)4 from FeCl3 and the Unsymmetrical Tripodal Ligand N[(CH2CH2NH2)(CH2CH2OH)(CH2CH2CH2OH)]

2004 ◽  
Vol 59 (8) ◽  
pp. 855-858 ◽  
Author(s):  
Ekkehardt Hahn ◽  
Christoph Jocher ◽  
Thomas Lügger
Keyword(s):  
Coordination Chemistry ◽  
Structure Determination ◽  
Disodium Salt ◽  
Ferrous Chloride ◽  
Tripodal Ligand ◽  
The Core ◽  
Yellow Precipitate

AbstractThe coordination chemistry of the unsymmetric, aliphatic, tetradentate tripodal ligand N[(CH2CH2NH2)(CH2CH2OH)(CH2CH2CH2OH)] H4-1 with iron chlorides was investigated. The disodium salt of the deprotonated ligand Na2(H2-1) reacts with FeCl3 to yield a yellow precipitate which upon recrystallization from DMSO/CH2Cl2 gives red crystals of the octanuclear iron(III) complex [{FeIIICl(H2-1)}4FeIII4(μ4-O)4Cl4] 2 ・ 4CH2Cl2 containing a central Fe4(μ4-O)4 cubane core. Crystals of 2 ・4DMF were obtained by slow oxidation of the green iron(II) complex obtained from ferrous chloride and Na2(H2-1) after recrystallization from DMF. The structure determination of 2 ・4CH2Cl2 also revealed the presence of the iron(III) oxo cubane core. The core is surrounded by four iron atoms each coordinated by η4-(H2-1)2- and Cl- ligands.

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