Metal Complexes Derived from 1-(Benzotriazole-1-carbonylmethyl)-4-(α-naphthyl)-3-thiosemicarbazide with Some metal chlorides

1996 ◽  
Vol 26 (1) ◽  
pp. 115-123 ◽  
Author(s):  
Xu Pengfei ◽  
Xu Zhuguo ◽  
Wu Shaozu
Keyword(s):  
Metal Complexes ◽  
Metal Chlorides

Metal complexes as ligands. X. Investigation of valency and substituent effects in binuclear complexes derived from tetradentate salicylaldimines

1972 ◽  
Vol 25 (1) ◽  
pp. 45 ◽  
Author(s):  
S Kokot ◽  
CM Harris ◽  
E Sinn
Keyword(s):  
Metal Complexes ◽  
Substituent Effects ◽  
Nickel Complexes ◽  
Magnetic Interactions ◽  
Binuclear Complexes ◽  
Electronic Effects ◽  
Metal Chlorides ◽  
Limited Sampling ◽  
Phenyl Rings ◽  
The Difference

A series of binuclear complexes has been formed by using planar copper(11) complexes (CUTSB) of tetradentate Schiff bases (TSB) as ligands to coordinate with metal chlorides. The binuclear complexes, (CuTSB)MCln (M = Cu11, Fe111, Mn11; n. = 2, 3), all exhibit pairwise antiferromagnetic interactions. The nickel complexes (NitsB)Mcln (M = FeIII, MnII) can be formed similarly, but the nickel atoms are diamagnetic so that no significant magnetic interactions are expected. The effect of 5-Cl, 5-Br, and 5,6-benzo substituents in the phenyl rings of the TSB groups on the strength of the antiferromagnetic interactions was examined in the complexes (CUTSB)CuCl2. Although the presence of a substituent usually increases the strength of the interaction, this trend is not systematic and there is no reason to attribute it to electronic effects of ring substituents. In (CUTSB)MCln, the main difference between the complexes with M = Fe111 and M = Mn11 is the difference in the valencies of the two d5 metals. In our limited sampling (one complex of each type), the interaction is stronger between iron(111) and copper(11) than between the manganese(11) and copper(11). These complexes form as hydrates, and since iron(111) and manganese(11) prefer octahedral environments, it is probable that one and two molecules of water respectively are coordinated to these metals. In the case where M = FeIII, N�ssbauer measurements indicate that this is so.

Research on Macro Cyclic Polyamine Complexes of Transition Metal and Catalytic Properties

2013 ◽  
Vol 850-851 ◽  
pp. 24-27
Author(s):  
Hong Lei
Keyword(s):  
Metal Complexes ◽  
Spectroscopic Characterization ◽  
Hydrolytic Activity ◽  
Macrocyclic Polyamine ◽  
Metal Chlorides ◽  
Carbohydrate Ligands ◽  
Coordination Ability ◽  
Important Significance ◽  
Hydrolysis Activity

This article Synthesis of carbohydrate ligands of coordination ability, to react with metal Chlorides to get more stable complexes, and elemental analysis, infrared, Ultraviolet Spectroscopic characterization and analysis of nuclear magnetic resonance. Characterization of its structure and study on the hydrolysis activity of pnitrophenyl picolinate lipid and the activity of pnitrophenol solution of phosphate, disodium macrocyclic polyamine catalyzed by macrocyclic polyamine metal complexes. The results show that the effect of hydrolytic activity of macrocyclic polyamine complexes is much larger than the hydrolysis activity of ordinary metal complexes; it can be important significance to find a better way of cutting nucleic acid by hydroxylation.

Metallkomplexe von Biologisch Wichtigen Liganden, CXLVIII [1]. Katalytische Peptidsynthese aus Glycinester miit Hilfe von Triflaten Und Cloriden der Seltenen Erden, sowie von Metall(III), (IV), (V) und (VI)-Chloriden / Metal Complexes of Biologically Important Ligands, CXLVIII [1]. Synthesis of Peptides from Glycine Ester Catalysed by Triflates and Chlorides of Metal(III, IV, V And VI) Ions

2003 ◽  
Vol 58 (1) ◽  
pp. 85-91 ◽  
Author(s):  
Jan Schapp ◽  
Wolfgang Beck
Keyword(s):  
Amino Acid ◽  
Metal Complexes ◽  
Dansyl Chloride ◽  
Amino Acid Esters ◽  
Metal Chlorides ◽  
Peptide Formation ◽  
Metal Triflates ◽  
High Yields ◽  
Acid Esters

Abstract Formation of di- and triglycine ethylester which were determined by HPLC after derivatisation with dansyl chloride was observed in medium to high yields from CH2Cl2 solutions of glycine ethylester in the presence of metal triflates and metal chlorides: FeCl3 (yield 82%), AlCl3 (73%), GdCl3 (56%), La(OTf)3 (59%), Sc(OTf)3 (55%), ZrCl4 (62%), HfCl4 (60%), VOCl3 (43%), TaCl5 (29%). Esters of higher α-amino acid esters (AlaOMe, PheOMe) gave lower yields in peptide formation.

scholarly journals Synthesis and Characterization of Transition Metal Complexes with

2009 ◽  
Vol 2 (1) ◽  
pp. 114-126 ◽  
Author(s):  
Y. Prashanthi ◽  
Shiva Raj
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Schiff Bases ◽  
Transition Metal Complexes ◽  
Azomethine Nitrogen ◽  
Spectral Studies ◽  
Activity Data ◽  
Metal Chlorides ◽  
Antimicrobial Studies ◽  
Bacteria And Fungi

The Schiff bases namely MIMFMA, MIMTMA and MIPMA have been prepared by reacting 3-amino-5-methyl isoxazole with 5-methyl furan-2-carboxyaldehyde, 5-methyl thiphene-2-carboxaldehyde and pyridine-2-carboxaldehyde. The Cu(II), Ni(II), Co(II), Zn(II) and VO(IV) have been prepared by reacting metal chlorides with those  Schiff bases in an alchololic medium. The complexes are electrolytes in DMSO. These have been  characterized by using elemental analysis, IR, UV-VIS, 1H, 13C, mass spectra, magnetic susceptibility, conductance measurements and thermo gravimetric studies. The complexes were found to have composition ML2. On basis of elemental and spectral studies, six coordinated geometry is assigned for these complexes. The Schiff bases act as neutral and bidentate and coordinate through the azomethine nitrogen and furfural oxygen, thiophene sulphur and pyridine nitrogen, respectively. The synthesized ligands and their metal complexes were screened against bacteria and fungi.  The activity data show that the metal complexes are more potent than the parent Schiff bases. Keywords; Schiff bases; Transition metal complexes; Spectral studies; Antimicrobial studies. © 2010 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved. DOI: 10.3329/jsr.v2i1.2732                  J. Sci. Res. 2 (1), 114-126 (2010)   

scholarly journals Synthesis and Characterization of Some Group 12 Metal Complexes with Tellurium Containing 10-Membered Tetraazamacrocyclic Ligands

2011 ◽  
Vol 8 (3) ◽  
pp. 1158-1163
Author(s):  
Nitu ◽  
K. K. Verma
Keyword(s):  
Metal Complexes ◽  
Spectral Studies ◽  
Conductivity Measurements ◽  
Metal Chlorides ◽  
Group 12 ◽  
Elemental Analyses ◽  
Physicochemical Studies ◽  
Tetraazamacrocyclic Ligands ◽  
Pmr Spectra

A new series of 10-membered tellurium containing tetraazamacrocyclic complexes, [ML1Cl2], [ML2Cl2] and [ML3Cl2], where [M=Zn(II), Cd(II), Hg(II); L1, L2and L3=10-membered tellurium containing tetraazamacrocyclic ligands] have been prepared via the template condensation of ethylenediamine and diaryltellurium dichlorides, R2TeCl2, (R=p-hydroxyphenyl, 3-methyl-4-hydroxyphenyl,p-methoxyphenyl) in the presence of metal chlorides. These complexes have been characterized by elemental analyses, conductivity measurements, infrared, electronic absorption and proton magnetic resonance spectral studies. IR and PMR spectra confirm the formation of 10-membered tetraazamacrocycle skeleton and their tetradentate nature. An octahedral geometry has been assigned to all the metal complexes on the basis of various physicochemical studies.

Transition metal complexes of thiabendazole

1971 ◽  
Vol 24 (7) ◽  
pp. 1369 ◽  
Author(s):  
C Kowala ◽  
KS Murray ◽  
JM Swan ◽  
BO West
Keyword(s):  
Electrical Conductivity ◽  
Transition Metal ◽  
Transition Metals ◽  
Metal Complexes ◽  
Organic Solvents ◽  
Transition Metal Complexes ◽  
Metal Ion ◽  
Magnetic Moments ◽  
Anthelmintic Activity ◽  
Metal Chlorides

Complexes of thiabendazole with transition metals (Co2+, Cu2+, Fe2+, Fe3+, Mn2+, Ni2+, and Zn2+) containing one, two, or three molecules of ligand per metal ion are described. Their spectra and magnetic moments are reported. In general, the complexes are insoluble or only slightly soluble in water or most organic solvents. Only complexes of metal chlorides are sufficiently soluble in methanol to show electrical conductivity. It is suggested that most of the insoluble complexes are of polymeric character. � The anthelmintic activity of all complexes is only slightly higher than that of thiabendazole.

Metallkomplexe mit polymeren Liganden, V / Metal Complexes with Polymeric Ligands, V

1974 ◽  
Vol 29 (1-2) ◽  
pp. 65-67 ◽  
Author(s):  
Hans-G. Biedermann ◽  
Wolfgang Graf
Keyword(s):  
Electrical Conductivity ◽  
Molecular Weight ◽  
Transition Metal ◽  
Ir Spectra ◽  
Metal Complexes ◽  
Conductivity Measurements ◽  
Metal Chlorides ◽  
Polymeric Ligands

Poly-1-vinyl-2-pyrrolidinone of various molecular weight forms with transition metal chlorides in specific mixtures of solvents the following complexes: [Me(II)Cl2(C6H9NO)2]100, [NiCl2(C6H9NO)1]100, [Co(C6H9NO)2]n, Me = Fe, Co, Ni, Cu, Zn, n = 220, 360, 6300.The IR spectra and electrical conductivity measurements are discussed.

Characterization of polymeric metal complexes formed by reaction of excess diethyl acetyl- or diethyl benzoyl-phosphonate with metal chlorides at elevated temperatures

1981 ◽  
Vol 43 (11) ◽  
pp. 2753-2757 ◽  
Author(s):  
Chester M. Mikulski ◽  
Nancy Harris ◽  
Patricia Sanford ◽  
Frank J. Iaconianni ◽  
Louis L. Pytlewski ◽  
...  
Keyword(s):  
Metal Complexes ◽  
Elevated Temperatures ◽  
Metal Chlorides ◽  
Polymeric Metal Complexes

Mechanochemical changes on cyclometalated Ir(iii) acyclic carbene complexes – design and tuning of luminescent mechanochromic transition metal complexes

2020 ◽  
Vol 7 (3) ◽  
pp. 786-794 ◽  
Author(s):  
Jingqi Han ◽  
Kin-Man Tang ◽  
Shun-Cheung Cheng ◽  
Chi-On Ng ◽  
Yuen-Kiu Chun ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Carbene Complexes ◽  
New Class

A new class of luminescent cyclometalated Ir(iii) complexes with readily tunable mechanochromic properties derived from the mechanically induced trans-to-cis isomerization have been developed.

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