Synthesis and Spectroscopic Studies on Azo-Dye Derivatives of Polymetallic Lanthanide Complexes: Using Diazotization to Link Metal Complexes Together

2009 ◽  
Vol 131 (29) ◽  
pp. 9916-9917 ◽  
Author(s):  
Matteo P. Placidi ◽  
Aaron Joseph L. Villaraza ◽  
Louise S. Natrajan ◽  
Daniel Sykes ◽  
Alan M. Kenwright ◽  
...  
Keyword(s):  
Metal Complexes ◽  
Azo Dye ◽  
Lanthanide Complexes ◽  
Spectroscopic Studies ◽  
Derivatives Of

Lanthanide Complexes Formed with the Tri- and Tetraacetate Derivatives of Bis(aminomethyl)phosphinic Acid: Equilibrium, Kinetic and NMR Spectroscopic Studies

2012 ◽  
Vol 2012 (12) ◽  
pp. 2062-2073 ◽  
Author(s):  
Gyula Tircsó ◽  
Ferenc K. Kálmán ◽  
Róbert Pál ◽  
István Bányai ◽  
Tamás R. Varga ◽  
...  
Keyword(s):  
Lanthanide Complexes ◽  
Phosphinic Acid ◽  
Spectroscopic Studies ◽  
Derivatives Of

Potentiometric and spectroscopic studies of transition metal complexes of bis(imidazolyl) and bis(pyridyl) derivatives of amino acids

1998 ◽  
Vol 283 (1) ◽  
pp. 233-242 ◽  
Author(s):  
Katalin Várnagy ◽  
Imre Sóvágó ◽  
Wolfgang Goll ◽  
Helga Süli-Vargha ◽  
Giovanni Micera ◽  
...  
Keyword(s):  
Amino Acids ◽  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Spectroscopic Studies ◽  
Derivatives Of

scholarly journals Preparation and Spectroscopic Studies of Cadmium(II), Zinc(II),Mercury(II) and Vanadium(IV) Chelates Azo Ligand Derived from 4-Methyl-7-hydroxycoumarin

2021 ◽  
Vol 21 (4) ◽  
pp. 912
Author(s):  
Bayader Fathil Abass ◽  
Taghreed Mohy Al-Deen Musa ◽  
Mahmoud Najim Aljibouri
Keyword(s):  
Metal Complexes ◽  
Azo Dye ◽  
Diazonium Salt ◽  
Free Ligand ◽  
Weight Percent ◽  
Spectroscopic Studies ◽  
Pure Metal ◽  
Transition Elements ◽  
Wide Range ◽  
Azo Ligand

The present paper demonstrates the synthesis and characterization of some transition elements complexes derived from (E)-7-hydroxy-6-((4-methoxyphenyl)diazenyl)-4-methyl-2H-chromen-2-one. The ligand was prepared in the general route of azo dyes by coupling the diazonium salt of 4-methoxyaniline with 4-methyl-7-hydroxycoumarin in sodium hydroxide 10% (w/v) solution. The azo ligand was identified on the basis of elemental analyses, MS, H-NMR and FT-IR spectra. The products of complexes with the new azo dye were isolated by the direct reactions of the metal chlorides of cadmium(II), zinc(II), vanadium(IV) and mercury(II) ions with the alkaline solution of free ligand to afford the colored in the following formulas, complexes[ML2]2H2O formula, M=Cd(II) and Zn(II). However the vanadium(IV) complex was square pyramid in [VOL2]SO42H2O chemical formula. As well as the tetrahedral environment was suggested for mercury(II) complex in formula [HgL2]. The time and mole ratio factors were studied to obtain the optimized conditions of metal complexes formations and the observed data investigated the deprotonation of the azo-dye at pH to range (7–7.5) with 30 min as time of reaction to get pure metal chelates. The TG-DSC study confirmed the thermal stability of complexes at a wide range of average heating in inert gas of analysis and the results observed from loss weight percent investigated the proposed structures of the prepared metal complexes.

scholarly journals Functionalised Terpyridines and Their Metal Complexes—Solid-State Interactions

Chemistry ◽  
2021 ◽  
Vol 3 (1) ◽  
pp. 199-227
Author(s):  
Young Hoon Lee ◽  
Jee Young Kim ◽  
Sotaro Kusumoto ◽  
Hitomi Ohmagari ◽  
Miki Hasegawa ◽  
...  
Keyword(s):  
Solid State ◽  
Metal Complexes ◽  
Crystal Structures ◽  
Weak Interactions ◽  
Dispersion Interactions ◽  
Derivatives Of

Analysis of the weak interactions within the crystal structures of 33 complexes of various 4′-aromatic derivatives of 2,2′:6′,2″-terpyridine (tpy) shows that interactions that exceed dispersion are dominated, as expected, by cation⋯anion contacts but are associated with both ligand–ligand and ligand–solvent contacts, sometimes multicentred, in generally complicated arrays, probably largely determined by dispersion interactions between stacked aromatic units. With V(V) as the coordinating cation, there is evidence that the polarisation of the ligand results in an interaction exceeding dispersion at a carbon bound to nitrogen with oxygen or fluorine, an interaction unseen in the structures of M(II) (M = Fe, Co, Ni, Cu, Zn, Ru and Cd) complexes, except when 1,2,3-trimethoxyphenyl substituents are present in the 4′-tpy.

scholarly journals The Exchange of Cyclometalated Ligands

Molecules ◽  
2021 ◽  
Vol 26 (1) ◽  
pp. 210
Author(s):  
Alexander D. Ryabov
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Bond Activation ◽  
Bond Cleavage ◽  
Cyclopalladated Complexes ◽  
Derivatives Of ◽  
Cyclometalated Ligand ◽  
Incoming Ligand

Reactions of cyclometalated compounds are numerous. This account is focused on one of such reactions, the exchange of cyclometalated ligands, a reaction between a cyclometalated compound and an incoming ligand that replaces a previously cyclometalated ligand to form a new metalacycle: + H-C*~Z ⇄ + H-C~Y. Originally discovered for PdII complexes with Y/Z = N, P, S, the exchange appeared to be a mechanistically challenging, simple, and convenient routine for the synthesis of cyclopalladated complexes. Over four decades it was expanded to cyclometalated derivatives of platinum, ruthenium, manganese, rhodium, and iridium. The exchange, which is also questionably referred to as transcyclometalation, offers attractive synthetic possibilities and assists in disclosing key mechanistic pathways associated with the C–H bond activation by transition metal complexes and C–M bond cleavage. Both synthetic and mechanistic aspects of the exchange are reviewed and discussed.

ChemInform Abstract: SYNTHESIS AND MOESSBAUER SPECTROSCOPIC STUDIES OF CARBONYL DERIVATIVES OF (PHTHALOCYANINATO)IRON(II)

1982 ◽  
Vol 13 (36) ◽  
Author(s):  
F. CALDERAZZO ◽  
S. FREDIANI ◽  
B. R. JAMES ◽  
G. PAMPALONI ◽  
K. J. REIMER ◽  
...  
Keyword(s):  
Spectroscopic Studies ◽  
Carbonyl Derivatives ◽  
Derivatives Of
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