ChemInform Abstract: Synthesis, Characterization and Catecholase Activity of a Series of Novel Mononuclear Cu(II) Complexes Derived from a Tripodal Ligand.

ChemInform ◽  
1989 ◽  
Vol 20 (22) ◽  
Author(s):  
M. R. MALACHOWSKI ◽  
M. G. DAVIDSON ◽  
J. N. HOFFMAN
Keyword(s):  
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.

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.

scholarly journals Solvent-Induced Hysteresis Loop in Anionic Spin Crossover (SCO) Isomorph Complexes

2021 ◽  
Vol 7 (6) ◽  
pp. 75
Author(s):  
Emmelyne Cuza ◽  
Samia Benmansour ◽  
Nathalie Cosquer ◽  
Françoise Conan ◽  
Carlos J. Gómez-García ◽  
...  
Keyword(s):  
Metal Ion ◽  
Spin Crossover ◽  
Magnetic Behaviour ◽  
Magnetic Studies ◽  
Tridentate Ligands ◽  
Tripodal Ligand ◽  
Single Crystal Structures ◽  
One Step ◽  
Lower Temperature ◽  
Step Transition

Reaction of Fe(II) with the tris-(pyridin-2-yl)ethoxymethane (py3C-OEt) tripodal ligand in the presence of the pseudohalide ancillary NCSe- (E = S, Se, BH3) ligand leads to the mononuclear complex [Fe(py3C-OEt)2][Fe(py3C-OEt)(NCSe)3]2·2CH3CN (3), which has been characterised as an isomorph of the two previously reported complexes, Fe(py3C-OEt)2][Fe(py3C-OEt)(NCE)3]2·2CH3CN, with E = S (1), BH3 (2). X-ray powder diffraction of the three complexes (1–3), associated with the previously reported single crystal structures of 1–2, revealed a monomeric isomorph structure for 3, formed by the spin crossover (SCO) anionic [Fe(py3C-OEt)(NCSe)3]− complex, associated with the low spin (LS) [Fe(py3C-OEt)2]2+ cationic complex and two solvent acetonitrile molecules. In the [Fe(py3C-OEt)2]2+ complex, the metal ion environment involves two py3C-OEt tridentate ligands, while the [Fe(py3C-OEt)(NCSe)3]− anion displays a hexacoordinated environment involving three N-donor atoms of one py3C-OEt ligand and three nitrogen atoms arising from the three (NCSe)− coligands. The magnetic studies for 3 performed in the temperature range 300-5-400 K, indicated the presence of a two-step SCO transition centred around 170 and 298 K, while when the sample was heated at 400 K until its complete desolvation, the magnetic behaviour of the high temperature transition (T1/2 = 298 K) shifted to a lower temperature until the two-step behaviour merged with a gradual one-step transition at ca. 216 K.

Lanthanide Podands with a Short Tripodal Ligand: The Missing Piece of Puzzle

2020 ◽  
Author(s):  
Jing‐Peng Sa ◽  
Laure Guénée ◽  
Prodipta Pal ◽  
Josef Hamacek
Keyword(s):  
Tripodal Ligand
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