Sulfonated Schiff base dinuclear and polymeric copper(ii) complexes: crystal structures, magnetic properties and catalytic application in Henry reaction

2015 ◽  
Vol 39 (5) ◽  
pp. 3424-3434 ◽  
Author(s):  
Susanta Hazra ◽  
Anirban Karmakar ◽  
Maria de Fátima C. Guedes da Silva ◽  
L'ubor Dlháň ◽  
Roman Boča ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Schiff Base ◽  
Single Crystal ◽  
Aqueous Medium ◽  
Structure Analysis ◽  
Variable Temperature ◽  
Henry Reaction ◽  
Magnetic Studies ◽  
X Ray ◽  
Catalytic Application

Aqueous medium syntheses and nitroaldol catalytic studies of three pseudohalide bridged copper(ii) complexes characterized by single crystal X-ray structure analysis and variable temperature magnetic studies are reported.

Syntheses, structures and magnetic properties of two CoII/NiII isostructural coordination polymers based on an asymmetric semirigid tricarboxylate ligand

2022 ◽  
Vol 78 (1) ◽  
Author(s):  
Shao-Dong Li ◽  
Feng Su ◽  
Cheng-Yong Zhou ◽  
Qi-Long Hu ◽  
Ya-Qi Li ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Ir Spectroscopy ◽  
Single Crystal ◽  
Coordination Polymers ◽  
Two Dimensional ◽  
X Ray Diffraction ◽  
Magnetic Studies ◽  
Thermogravimetric Analyses ◽  
X Ray ◽  
Elemental Analyses

Two new isostructural complexes, namely, poly[aqua[μ3-2-(4-carboxyphenoxy)terephthalato-κ3 O 1:O 4:O 4′](1,10-phenanthroline-κ2 N,N′)cobalt(II)], [Co(C15H8O7)(C12H8N2)(H2O)] n or [Co(μ3-Hcpota)(phen)(H2O)] n , I, and poly[aqua[μ3-2-(4-carboxyphenoxy)terephthalato-κ3 O 1:O 4:O 4′](1,10-phenanthroline-κ2 N,N′)nickel(II)], [Ni(C15H8O7)(C12H8N2)(H2O)] n or [Ni(μ3-Hcpota)(phen)(H2O)] n , II, have been synthesized by solvothermal reactions. Complexes I and II were fully characterized by IR spectroscopy, elemental analyses, thermogravimetric analyses, and powder and single-crystal X-ray diffraction. They both present two-dimensional structures based on [M 2(μ-COO)2]2+ (M = CoII or NiII) dinuclear metal units with a fes topology and a vertex symbol (4·82). Interestingly, the positions of the two dimeric metal motifs and the two partially deprotonated Hcpota2− ligands reproduce regular flying butterfly arrangements flipped upside down and sharing wings in the ab plane. Magnetic studies indicate antiferromagnetic interactions (J = −5.21 cm−1 for I and −11.53 cm−1 for II) in the dimeric units, with Co...Co and Ni...Ni distances of 4.397 (1) and 4.358 (1) Å, respectively, that are related to double syn–anti carboxylate bridges.

Übergangsmetallkomplexe mit Schwefelliganden, XCII. Oxidation von Thiolat-Amin- zu Schiffbase-Eisen(II)-Komplexen. Röntgenstrukturanalyse und Reaktivität von [Fe('N2S2')]2 (′N2S2′2- = Glyoxal-bis(2-mercaptoanil)(2 – )) / Transition Metal Complexes with Sulfur Ligands, XCII. Oxidation of Thiolate Amine to Schiff Base Iron(II) Complexes. X-Ray Structure Analysis and Reactivity of [Fe(′N2S2')]2 (′N2S2′2- = Glyoxal-bis(2-mercaptoanil)(2–))

1992 ◽  
Vol 47 (11) ◽  
pp. 1545-1550 ◽  
Author(s):  
Dieter Sellmann ◽  
Marcus Hannakam ◽  
Falk Knoch ◽  
Matthias Moll
Keyword(s):  
Schiff Base ◽  
Transition Metal ◽  
Metal Complexes ◽  
Single Crystal ◽  
Structure Analysis ◽  
Transition Metal Complexes ◽  
X Ray

Oxidation of [Fe(CO)2(′N2H2S2′')] (1) (′N2H2S2'2- = 1,2-ethanediamine-N,N′-bis(2-benzenethiolate)(2—)) gave insoluble [Fe(′N2S2')]2 (2) ('N2S2'2- = glyoxal-bis(2-mercaptoanil)(2—)). Dinuclear, thiolato-bridged 2 was characterized by single crystal X-ray structure analysis. It does not react with CO or H2, but yields bis or mono adducts with PR3 (R = Me, n-Bu, Cy).

Synthesis, Characterisation, Structure, and Magnetic Properties of [Ni{H2NCH(CH3)CH2NH2}3][Fe(CN)5NO]·H2O

2005 ◽  
Vol 60 (10) ◽  
pp. 1043-1048 ◽  
Author(s):  
Manas Kumar Saha ◽  
Dilip Kumar Dey ◽  
Brajagopal Samanta ◽  
Subrata Kumar Dey ◽  
K. M. Abdul Malik ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Aqueous Solution ◽  
Magnetic Properties ◽  
Single Crystal ◽  
Structure Analysis ◽  
Mossbauer Spectroscopy ◽  
Crystal Structure Analysis ◽  
Single Crystal Structure ◽  
Magnetic Studies ◽  
Single Crystal Structure Analysis

The complex [Ni(pn)3][Fe(CN)5NO]·H2O (1) was synthesised by the reaction of [Ni(pn)3]Cl2 (pn = racemic propane-1,2-diamine) with Na2[Fe(CN)5NO]·2H2O in aqueous solution and has been charaterised by IR and Mössbauer spectroscopy and magnetic studies. Single crystal structure analysis revealed octahedrally coordinate cations [Ni(pn)3]2+ and anions [Fe(CN)5NO]2−.

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.

How the Magnetic Field Impacts the Chiroptical Activities of Helical Copper Enantiomers

2021 ◽  
Author(s):  
jialu wu ◽  
Bo Li ◽  
Hong Wang ◽  
Ying Zhen Lai ◽  
Yue Ye ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Solid State ◽  
Thermogravimetric Analysis ◽  
Single Crystal ◽  
Structure Analysis ◽  
Chiral Ligands ◽  
X Ray ◽  
The Magnetic Field

A pair of enantiomers {[Cu(L-pro)(L-tyr)]·2H2O}n (L-1) and {[Cu(D-pro)(D-tyr)]·2H2O}n (D-1) based on the chiral ligands L/D-proline and L/D-tyrosine were synthesized and investigated by single-crystal X-ray structure analysis, IR, thermogravimetric analysis, solid-state...

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