Template synthesis and structural studies of transition metal complexes of macrocylic ligands

  • 319 Pages
  • 2.48 MB
  • English
LC ClassificationsMicrofilm 60163
The Physical Object
Paginationix, 319 l.
ID Numbers
Open LibraryOL1368437M
LC Control Number92895734

The crystal structures of 1–3 and one conformer of 4–6 (4a–6a) have been determined by single-crystal X-ray diffraction studies. The metal ion is found to reside in the cavity of the macrocyclic ring and adopts a square-planar dsc-sports.com: Taotao Lu, Zhiming Liu, Carlos A.

Steren, Fan Fei, Tabitha M. Cook, Xue-Tai Chen, Zi-Ling Xue. Macrocyclic and macrobicyclic ligands may enhance the stability of their metal complexes due to the inherent entropic and kinetic properties of a ligand ring or cage-type structure. In general, as the binding site becomes more encapsulated or preformed the reorganization entropy decreases, leading to a relatively higher formation constant Cited by: 2.

A novel series of macrocyclic complexes of the type [M(C(48)H(32)N(4))X]X(2); where M=Cr(III), Fe(III) and Mn(III); X=Cl(-), NO(3)(-), CH(3)COO(-) have been synthesized by template condensation of. Binuclear and polynuclear transition metal complexes with macrocyclic ligands 7. Directed step-by-step synthesis of novel unsymmetric macrocyclic ligands.

Russian Chemical Bulletin54 (9), DOI: /dsc-sports.com by: The template methodology is frequently used for the synthesis of macrocyclic complexes as the metal ions are supposed to direct the stearic course of reaction towards the condensation reaction.

METAL TEMPLATE SYNTHESIS 0P MACROCYCLIC AMIDE COMPLEXES David St.C. Black, Corrie H. Bos vanderzalm and Angus J. Hartshorn Department of Chemistry, Monash University, Clayton, Vic.

Australia (Recieved 22 December ; in revised form 11 May ) The synthesis of the macrocyclic metal complexes (2) from reactions of diaminodialdehydes (I Cited by: A membered macrocyclic hexaoxime was quantitatively obtained by [3 + 3] condensation of dialdehyde 2 with diamine 3 using La3+ (core metal) and Zn2+ (shell metal) as a novel core/shell template, while the yield was very low in the absence of the metal ions.

The high yield can be attributed to the efficient formation of a complex of dialdehyde 2, Zn2+, and La3+, which readily gives the Cited by: Template Synthesis of Polyaza Macrocyclic Copper(II) and Nickel(II) Complexes: Spectral Characterization and Antimicrobial Studies Article (PDF Available) in Bulletin.

Aug 06,  · Novel macrocyclic Ni II complexes were synthesized by the template reactions of different organic dicarbonyls (benzil, 2,3-butanedione and 2,6-diacetylpyridine) with the corresponding aliphatic diamines [ethylene diamine (en), diethylene triamine (tri), triethylene tetraamine (tetr) and tetraethylene pentaamine (pent)] and in the presence of NiCl 2 ·6H 2 dsc-sports.com by: 3.

Synthesis and structural characterization of metal complexes with macrocyclic tetracarbene ligands. Abstract.

Fourteen Ag(I), Au(I), Ni(II), Pd(II), and Pt(II) complexes with macrocyclic tetradentate N-heterocyclic carbene (NHC) ligands were prepared via reactions between three macrocyclic tetrabenzimidazolium salts and metal dsc-sports.com by: 6.

Template synthesis and physico-chemical characterization of membered tetraimine macrocyclic complexes, [MLX 2] [M = Co(II), Ni(II), Cu(II) and Zn(II)].

DNA binding study on [CoLCl 2 ] complex Author links open overlay panel Farha Firdaus a Kaneez Fatma a Mohammad Azam a Shahper N. Khan b Asad U.

Khan b Mohammad Shakir aCited by: Aug 18,  · Novel penta-azamacrocyclic membered [N 5] ligand [L] and its transition metal complexes with Co(II), Ni(II), Cu(II), Ru(III) and Pd(II) have been isolated and dsc-sports.com mode of bonding and overall geometry of the complexes have been inferred through IR, MS, UV–Vis, EPR, 1 H NMR spectral studies, molar conductivity, magnetic, thermal and microanalyses, On the basis of above studies Cited by: 8.

Synthesis, characterization, crystal structure and antibacterial studies of some new heptadentate manganese(II), cadmium(II) and zinc(II) macrocyclic Schiff base complexes with Cited by: In the present study, a new Tetraaza (N 4) macrocyclic metal complexes obtained by template condensation reaction were synthesized.

The structure of macrocyclic metal complexes have been proposed on the basis of the analytical data as elemental analyses, conductivity, magnetic, spectral as electronic, EPR and IR and thermal dsc-sports.com by: 1.

applications of macrocyclic ligands. 2 CLASSIFICATION OF LIGANDS Two major areas of complexation have developed over the years with regard to synthetic macrocycles. Those with nitrogen, sulfur, phosphorus, and arsenic tend predominantly to form traditional covalent coordination complexes with transition metal ions.

Download Template synthesis and structural studies of transition metal complexes of macrocylic ligands PDF

A notable exception to this. Synthesis,Biological Studies of Macrocyclic Transition Metal Complexes Book Published in Lambert Academics Publishing.

Book · August with Author: Rayees Sheikh. Aug 26,  · Metal complexes of the type [MLCl2], [M = Co(II), Ni(II)], were synthesized by the reaction of a free macrocyclic ligand (L) with the corresponding metal salts in a 1: 1 molar dsc-sports.com by: 1.

The present studies described the new macrocyclic complexes of different metals synthesis. These complexes were crystalline solids, non-hygroscopic.

The UV-Vis measurements were carried out using a spectrophotometer (systronics UV-Vis spectrophotometer ).The formulae for these macrocyclic complexes can be assigned on the basis.

Macrocyclic compounds containing oxygen, sulfur and nitrogen as donor atoms ligands that form a large, continuous ring around a metal ion and form extremely stable complexes. Direct synthesis of metal complexes can be achieved from the use of “free” (gas phase) metal atoms, from the oxidative dissolution of zerovalent metals, from mechanochemical or tribosynthesis or from the electrochemical oxidation of metallic anodes in solution.

Synthesis and Characterization of Transition Metal Complexes of Chlorpromazine Yakubreddy Naini 1, Tarab J. Ahmad, Gilles K.

Kouassi 1, S. Ananda2,Netkal M. Made Gowda,* 1Department of Chemistry, Western Illinois University, One University Circle, Macomb,USA.

Details Template synthesis and structural studies of transition metal complexes of macrocylic ligands EPUB

Macrocyclic ligands are considerably attractive in the quest for new chemistry, because they offer a wide variety of donor atoms, ionic charges, coordination numbers and geometry of the resultant complexes [1–5].The understanding of the metal ion chemistry of macrocyclic ligands has important implications for a range of chemical and biochemical applications [6,7].Cited by: Synopsis.

All-inorganic crown-ether type oxo-ligand complexes constructed from a flexible cyclic vanadate, (VO 3) n n- were prepared by metal template dsc-sports.com resulting complexes define a new class of cyclic vanadate that feature novel macrocyclic coordination chemistry between polyoxovanadates and various metal cationic dsc-sports.com by: In chemistry, a template reaction is any of a class of ligand -based reactions that occur between two or more adjacent coordination sites on a metal center.

In the absence of the metal ion, the same organic reactants produce different products. The term is mainly used in coordination chemistry.

Results and Discussion. A series of twelve tetraaza macrocyclic Cu(II) complexes were synthesized by treating CuCl 2 ·2H 2O and Cu(NO 3) 2 ·3H 2O with the six macrocyclic Schiff base ligands.

All the complexes are stable to the atmosphere. The complexes are soluble in chloroform, DMSO, DMF and aqueous dsc-sports.com by: Transition Metal Chemistry.

Transition Metal Chemistry 43, Issue 4, pp – | Cite as. Preparation, characterization and crystal structures of metal(II) tetraza macrocyclic complexes with organic co-ligands. Authors; Authors and affiliations The crystal structure of complex 1 shows a distorted octahedral coordination geometry Author: In-Taek Lim, Jong-Hoon Park, Ki-Young Choi, Chong-Hyeak Kim, Yoon-Mi Choi.

**The term 'template synthesis' is used to describe ligand formation by condensation in the presence of a metal ion. carbazide (II) ( mol) dissolved in 50 ml of hot water, 3 ml of concentrated hydrochloric acid was added.

The reaction mixture was kept on a hot water bath for 30 dsc-sports.com by: Jan 01,  ·1, 69, S. 53SchneiderRenè, RiesenAndreas, KadenThomas A., Helvetica Chimica Acta, HCA,Metal complexes with macrocyclic ligands. Part XXII. Synthesis two of bis-tetraaza-macrocycles and study of the structures, electrochemistry, VIS and EPR spectra of their binuclear Cu2+ and Ni2+ complexes CrossrefCited by: Apr 29,  · 6.

Conclusion. In this paper, the synthesis and coordination chemistry of some macrocyclic-based tetranuclear metal complexes derived from the Schiff-base Na 4 L are investigated.

A template approach was used to prepare the ligand in a reasonable dsc-sports.com by: 5. Examples of such ligands used to complex tin include (66) and (67), prepared by Schiff-base condensations.

The complex (68) was isolated from an attempted template synthesis of a macrocycle in which the condensation of the component parts of the ligand was incomplete.

NMR studies revealed that in the case of B15C5 type ligands the complex geometry depends on the metal ion size: small radius metal ions (like Zn 2+) are placed in the center of the crown ether cavity and the coordination by the pendant groups occurs at opposite sides of the macrocyclic plane, whereas binding of large cations (such as Cd 2+ and.Dec 28,  · The synthesis of cylinder-type carbene complexes from polycarbene ligands and coinage metal ions via metal-controlled self-assembly has been explored.

Imidazole reacts with 1,2,4,5-tetrabromobenzene or 1,3,5-tribromobenzene to give 1,2,4,5-tetrakis(1-imidazolyl)benzene (1) and 1,3,5-tris(1-imidazolyl)benzene (3), respectively.

The tetrakisimidazolium salts of type Ha,b(Br)4 and the Cited by: This book contains an overview of complex formation by macrocyclic ligand systems.

Description Template synthesis and structural studies of transition metal complexes of macrocylic ligands FB2

The study of macrocyclic chemistry represents a major area of activity which impinges on a range of other areas in both chemistry and biochemistry. The field has characteristically Author: L. F. Lindoy.