Effect of ligand substituents and tuning the spin-state switching in manganese(iii) complexes

2021 ◽  
Vol 50 (13) ◽  
pp. 4634-4642
Author(s):  
Subrata Ghosh ◽  
Sukanya Bagchi ◽  
Sujit Kamilya ◽  
Abhishake Mondal
Keyword(s):  
Schiff Base ◽  
Spin State ◽  
Structural Behavior ◽  
Schiff Base Ligands ◽  
State Switching

This work unravels the magneto-structural behavior of mononuclear manganese(iii) complexes with judiciously chosen substituted Schiff-base ligands, showcasing the role of ligand substitutions in spin-state switching.

scholarly journals New Zn(II) complexes with N2S2 Schiff base ligands. Experimental and theoretical studies of the role of Zn(II) in disulfide thiolate-exchange

Polyhedron ◽  
2014 ◽  
Vol 71 ◽  
pp. 1-7 ◽  
Author(s):  
Mehdi Amirnasr ◽  
Maryam Bagheri ◽  
Hossein Farrokhpour ◽  
Kurt Joβ Schenk ◽  
Kurt Mereiter ◽  
...  
Keyword(s):  
Schiff Base ◽  
Theoretical Studies ◽  
Schiff Base Ligands ◽  
Experimental And Theoretical Studies ◽  
Role Of Zn

scholarly journals Unprecedented Water Effect as a Key Element in Salicyl-Glycine Schiff Base Synthesis

Molecules ◽  
2020 ◽  
Vol 25 (5) ◽  
pp. 1257 ◽  
Author(s):  
Karolina Bakalorz ◽  
Łukasz Przypis ◽  
Mateusz Michał Tomczyk ◽  
Maria Książek ◽  
Ryszard Grzesik ◽  
...  
Keyword(s):  
Schiff Base ◽  
Aqueous Media ◽  
Schiff Base Ligands ◽  
Metal Catalysis ◽  
Space Groups ◽  
Monoclinic Form ◽  
Metal Organic ◽  
And Behavior ◽  
Amino Acid Schiff Base

Salens, as chelating, double Schiff base ligands, are an important group utilized in transition metal catalysis. They have been used to build interesting functional metal-organic frameworks (MOFs). However, salens interacting with amino acids have also found applications in receptors. Here, we intended to form a “green” glycine-derived salen fragment, but the available literature data were contradictory. Therefore, we optimized the synthetic conditions and obtained the desired product as two different crystallographic polymorphs (orthorhombic Pcca and monoclinic P21/c space groups). Their structures differ in conformation at the glycine moiety, and the monoclinic form contains additional, disordered water molecules. Despite the high stability of Schiff bases, these newly obtained compounds hydrolyze in aqueous media, the process being accelerated by metal cations. These studies, accompanied by mechanistic considerations and solid-state moisture and thermal analysis, clarify the structure and behavior of this amino acid Schiff base and shed new light on the role of water in its stability.

Substituent Effects on Spin State in a Series of Mononuclear Manganese(III) Complexes with Hexadentate Schiff-Base Ligands

2014 ◽  
Vol 53 (12) ◽  
pp. 6022-6033 ◽  
Author(s):  
Brendan Gildea ◽  
Michelle M. Harris ◽  
Laurence C. Gavin ◽  
Caroline A. Murray ◽  
Yannick Ortin ◽  
...  
Keyword(s):  
Schiff Base ◽  
Spin State ◽  
Substituent Effects ◽  
Schiff Base Ligands

Conductivity Studies of Schiff Base Ligands Derived from O-Phenylenediamine and Their Co(II) and Zn(II) Complexes

2015 ◽  
Vol 12 (2) ◽  
pp. 13
Author(s):  
Muhamad Faridz Osman ◽  
Karimah Kassim
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Fourier Transform ◽  
Schiff Base ◽  
Nmr Spectroscopy ◽  
Magnetic Resonance ◽  
Impedance Spectroscopy ◽  
Ftir Spectroscopy ◽  
Coordination Complexes ◽  
Frequency Range ◽  
Schiff Base Ligands

The coordination complexes of Co(II) and Zn(II) with Schiff bases derived from o-phenylenediamine and substituted 2-hydroxybenzaldehyde were prepared All compounds were characterized by Fourier transform infrared (FTIR) spectroscopy and Nuclear magnetic resonance (NMR) spectroscopy elemental analyzers. They were analyzed using impedance spectroscopy in the frequency range of 100Hz-1 MHz. LI and L2 showed higher conductivity compared to their metal complexes, which had values of 1.3 7 x 10-7 and 6.13 x 10-8 S/cm respectively. 

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.

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