2 edition of Synthesis of some nitrogen-donor macrocycles and their complexes with metal ions. found in the catalog.
Synthesis of some nitrogen-donor macrocycles and their complexes with metal ions.
Soraya Shezana Chaudhary
Written in English
|Contributions||University of North London.|
|The Physical Object|
|Number of Pages||268|
Abstract. The synthesis of novel nickel(II) complexes with new ligand derived from hydrazone of isoniazid has been reported. The complexes have general compositions [N i (L) 2 X 2] or [N i (L) 3] (C l O 4) 2, where L = N-isonicotinamido-furfuraldimine (INH-FFL) and X = C l − or N C S −.The ligand hydrazone behaves as neutral bidentate (N and O donor) through the carbonyl oxygen and. Interaction of transition and post-transition metal ions with oxygen–nitrogen donor macrocycles incorporating pendant hydroxyethyl and carbarnoylethyl groups. Part XIX. Synthesis and Cu2+-complexes of a series of , and memberedcis- andtrans-N2S2-macrocycles. Synthesis and characterization of some transition metal complexes.
of alkaline metal ions; Li +, Na, K + and Cs on the reaction yields were investigated. Sodium template generally was more effective for the synthesis of all four macrocycles. Relatively, good yields of and membered macrocycles were obtained in the presence of all kinds of applied cations. Metal(II) coordination compounds of glycine and ph-enylalanine were synthesized and characterized using infrared and electronic spectroscopic, and magnetic susceptibility measurements. The complexes were tested for antimicrobial activity against Bacillus subtilis, Staphylococcus aureus, Methicillin Resistant Staphy-lococcus aureus (MRSA), Escherichia coli, Pseudo-monas aeruginosa, Proteus.
Synthesis and Characterization of Some Metal Complexes with New Nitrogen–Oxygen Donor Macrocyclic Ligands – X-ray Crystal Structures of a Membered Reduced Monoprotonated Macrocycle and a Membered Pendant-Arm Schiff-Base Macrocyclic Cadmium(II) Complex. Template synthesis of some double Schiff-base metal(II) complexes through one pot four component reactions under mild and convenient conditions. Journal of Coordination Chemistry , 62 (7), DOI: /
Claus Oesau and his descendants.
investigation of odometer rollback activity
With the camel corps up the Nile
treatment of fractures
Monuments illustrating old and middle comedy.
Cid mining district of Davidson county, North Carolina.
Second generation subsea production systems
Rural lands and landowners of Ontario
Twelve in search of a house
Outlook for Chiles foreign trade and economic growth, 1959-1965.
N.F. Curtis, in Comprehensive Coordination Chemistry II, Functionalized C-substituents. Macrocycles with a variety of functionalized C-substituents have been described, including “pendant donor groups” which have a donor atom able to coordinate to the same or another cation, 72 with specific redox or spectroscopic character, or designed to enhance some biochemical property.
Synthesis and stability of the complexes of the mixed-donor macrocycle ANE-N 2 O 2. the synthesis of mixed-donor macrocycles containing oxygen and nitrogen donor atoms and the structures of some of their complexes with metal ions [3, 4].
We report here the synthesis of the novel macrocyclic ligand aneN (1,4-dioxa-7,1 1 Cited by: 2. Complexes of 1-(OC-naphthylacetyl)phenylthiosemicarbazide (NTSC) with some transition metal ions have been synthesized and characterized on the basis of elemental analyses, molar conductance.
The nitrogen donor macrocycles complex well with transition metal ions, as well as the post-transition metal ions.
The sulfur-donor macrocycles are weakly complexing with all metal ions, but complex best with the same group as the nitrogen donor macrocycles. This chapter is not an attempt to cover all aspects of macrocyclic chemistry, but Author: Arthur E.
Martell, Robert D. Hancock. In macrocyclic complexes the ν(C N) shows a shift towards lower side by 20–30 cm −1, hence, the ligand is tetradentate and the complexes coordinate to the metal ions through the nitrogen of C N group, which is further supported by the appearance of a medium intensity band in the region – cm −1 assignable to ν(M–N) by: Three hydrogen atoms participate in the unusual hydrogen bond in complex 1, which is obtained when the rhenium compound is cocrystallized with indole from structure of 1 was elucidated by means of neutron diffraction (HN ︁ HM distances of and Å).
The energy of the hydrogen bond was determined by IR spectroscopy (ΔH° = ± kcal mol −1). A metal-ion encapsulated in the three-dimensional ligand cavity must be an acceptor bonded to the donor groups of all macrocycles forming the cage framework. Ligands are usually referred to as “clathrochelants” and their complexes as “clathrochelates.” Metal ions with closed electronic shells are effectively encapsulated by the ligands.
H glacial N acetic N reflux 0 (,- N Hd TABLE I. Log K1 Values for Cu(II) and Zn(II) Complexes with Macrocycles and their Open Chain Analogues, Contrasting the Macrocyclic Effect in All-Nitrogen Donor Macrocycles with that in Macrocycles which Have an Oxygen-Donor Atom in.
' 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 ' () 69 (1) Helvetica Chimica Acta: Crossref.
Key words: Macrocyclic complexes, Transition metal ions. INTRODUCTION Macrocycles mimic important biological ligands developed long ago by nature, for example the porphyrin prosthetic group of many metalloproteins and also they impart thermodynamic and kinetic stabilities to their metal complexes uncommon or nonexistent with ligands of.
Synthesis and Characterization of Some Metal Complexes with New Nitrogen–Oxygen Donor Macrocyclic Ligands – X-ray Crystal Structures of a Membered.
All ligands form 1: 1 (metal: ligand) complexes in solution with these metal ions; the thermodynamic stabilities of the complexes in 95% methanol (I= mol dm–3, NEt4ClO4) have been determined. Porphyrins can also be readily metalated with a wide variety of metal ions and all the naturally occurring porphyrins are metal complexes.
The metal ions have an important inductive effect on the π-electron system and strongly influence the chemical reactivity, photophysical properties and biological functions of porphyrin macrocycles.
In the case of membered “2 + 2” symmetric macrocycles, the yields of the lanthanide(III) complexes are found to decrease along the lanthanide series due to the mismatch between the size of the heavier metal ions and the cavity of the macrocycle. In the present case the increase in the yield of the complexes along the lanthanide series.
macrocycles (capable of giving 8 and 9 membered chelate rings) and their complexes with copper(II), nickel(II), cobalt(III) and chromium(III). Some of their properties have also been investigated. b) A few macrocycles with different attached pendant functional groups were synthesized and their metal complexes characterized.
André Urfer, Thomas A. Kaden, Metal complexes of macrocyclic ligands. Part XXXVII. Synthesis of Heteroditopic Bis‐macrocycles and Their Potential for Preparing Heterobinuclear Metal Complexes, Helvetica Chimica Acta, /hlca, 77, 1, (), ().
Crystal structures of some of the metal complexes were determined by X-ray crystallography. Metal perchlorates were used in the preparation of the metal complexes with THTD and THTUD, and various methods were utilized for the crystallization process.
The general formula for these complexes is [M(L)]2+2(ClO 4)-where M=metal ion and L= neutral. The stability constants of the complexes of with some divalent first-series transition metal ions, Cd2+, and Pb2+ were determined by potentiometric methods. Book 1: SYNTHESIS, SPECTRAL AND.
A brief perspective of the area is presented and then the article addresses the development of pyridinyl-derived bibracchial (doubly pendant-armed) Schiff base macrocycles and their metal complexes.
Leussing, Unusual Stabilities of the Pyruvate-Glycinate Mixed Complexes with Some Divalent Metal Ions, Proceedings of the 8th International Conference on Coordination Chemistry, /, (), ().
Synthesis of some nitrogen-donor macrocycles and their complexes with metal ions. Author: Chaudhary, Soraya Shezana. ISNI: Awarding Body: University of North London Current Institution: London Metropolitan University Date of Award.Advances in Chemistry All Publications/Website.
OR SEARCH CITATIONS.macrocycles, and are identiﬁed by their pendant chains They can be categorized as either N-pivot (19)orC-pivot (20), depending on which type of atom the chain is attached.
As for their polyether parents, much of the focus on these macrocycles has been on complexation of alkali and alkaline earth metal ions. O O N O O O (19) O O O O O (