Download or read book Synthesis Characterization and Application of Chiral Schiff base Complexes written by Kayode Oshin and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This work examines the synthesis of novel chiral Schiff-base complexes derived from (1R,2R)-cyclohexanediamine and (R)-[1,1'-binaphthalene]-2-2'-diamine structural backbones with quinoline, isopropyl-quinoline, and benzoquinoline structural side-arms. We incorporated some degree of flexibility in the ligands and complexes so they can accommodate the sterics of different substrates during a catalytic reaction. We successfully achieved this by reducing the imine bond in the ligands to the corresponding amine bond. Therefore, the successful reduction and metallation of some of these ligands to give structures of different symmetries is reported. We had difficulty reducing ligands with the binaphthalene backbone but were able to partially reduce the ligand through a one-pot reaction with a zinc(II) salt and NaBH4. The complete 1H NMR assignments of the complexes reported in this thesis serve as a valuable tool for use in the characterization of future complexes. The complete NMR characterization of compounds reported is a complex process because they are polycyclic aromatic systems and the coupling network similarity in different parts of the molecule usually results in severe overlap of their 1H resonances. To overcome this impediment, we took advantage of various 2D-NMR techniques (COSY, NOESY, ROSEY, HSQC, and HMBC) along with other 1D-NMR experiments (1H HOMODEC, 1H, and 13C) to completely assign the desired complexes. Subsequently we also studied the coordination chemistry of several meal cations with our ligand system with the goal of obtaining single stranded monhelices. The potential use of some of the complexes in the area of NMR discrimination and kinetic resolution of racemic mixtures was examined and shown to be promising. Several NMR experiments were conducted using the racemic olefins 3-buten-2-ol and 1-penten-3-ol to demonstrate the discriminating power of our silver(I) complexes. We discovered that sterics play an important role in this resolution experiment and the bulky nature of our complexes affect the overall efficiency of the NMR discriminatory process as it diminishes the contact between the reactive metal center and the olefins involved. Temperature also plays a vital role in the chiral recognition of racemic olefins as we examined the ideal temperature needed to reduce the various dynamic processes that take place in solution at room temperature.

Download or read book Schiff Base Metal Complexes written by Pranjit Barman and published by John Wiley & Sons. This book was released on 2023-05-15 with total page 229 pages. Available in PDF, EPUB and Kindle. Book excerpt: Schiff Base Metal Complexes Schiff bases are compounds created from a condensed amino compounds, which frequently form complexes with metal ions. They have diverse applications in biology, catalysis, material science and industry. Understanding these compounds, their properties, and the available methods for synthesizing them is a key to unlocking industrial innovation. Schiff Base Metal Complexes provides a comprehensive overview of these compounds. It introduces the compounds and their properties before discussing their various synthesizing methods. A survey of existing and potential applications gives a complete picture and makes this a crucial guide for researchers and industry professionals looking to work with Schiff base complexes. Schiff Base Metal Complexes readers will also find: A systematic and organized structure designed to make information instantly accessible Detailed coverage of thermal synthesis, photochemical synthesis, and more Challenges with different methods described in order to help readers make the correct choice for their own work Schiff Base Metal Complexes is a useful reference for organic chemists, materials scientists, and researchers or industry professionals working with organometallics.

Download or read book Synthesis Characterization and Catalytic Testing of Chiral Schiff Base Metal Complexes Catalysts Immobilized in MCM 41 written by Rozie Sarip and published by . This book was released on 2007 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Beauty in Chemistry written by Luigi Fabbrizzi and published by Springer Science & Business Media. This book was released on 2012-02-22 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Beauty of Chemistry in the Words of Writers and in the Hands of Scientists, by Margherita Venturi, Enrico Marchi und Vincenzo Balzani Living in a Cage Is a Restricted Privilege, by Luigi Fabbrizzi Inner and Outer Beauty, by Kenneth N. Raymond und Casey J. Brown The Mechanical Bond: A Work of Art, by Carson J. Bruns und J. Fraser Stoddart The Beauty of Knots at the Molecular Level, by Jean-Pierre Sauvage und David B. Amabilino

Download or read book Synthesis Characterization and Determination of Absolute Structures of Palladium Complexes of Novel Chiral Acyclic Tellurated Schiff Base Ligands1 written by and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Structural and Biological Applications of Schiff Base Metal Complexes written by Pallavi Jain (Professor of chemistry) and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Coordination compounds have been well-known for their wide variety of applications for over a century, as well as enhancing the researcher's interest and concern in evaluating their action mechanism. It is certainly one of the most intensely discussed research topics. Coordination compounds involve different metal-ion-ligand phenomenon. The involved metal ions play a significant role in structural association and functioning of several processes in the genetic and metabolism system. In recent years, Schiff base ligands have gained significant interest and received a keen interest of many researchers. Schiff's base ligands have been recognized to hold a wide variety of biological and medicinal activities due to the presence of donor atoms. They have proved exceptional pharmalogical actions such as antimicrobial, anti-tuberclosis, antiplatelet, antidiabetic, antiarthritis, antioxidant, anti-inflammatory, anticancer, antiviral, antimalarial, and analgesic. These biologically active Schiff base ligands have also been shown to inhibit enzyme mobilization and, when bound to a metal ion, exhibit enhanced biological activity, making them useful in a number of fields. As a result, metal complexes of Schiff base ligands are gaining popularity due to their unique properties and functionalities. Schiff base complex-based research for educational and industrial purposes is booming, and the number of publications is gradually increasing. Despite these interests, there is currently no detailed book on Schiff base metal complexes that covers the structures, biological activities, and other non-biological perspectives. This book delves into the structures of Schiff base metal complexes, which are critical in assessing the biological viability of any complex. It also highlights their biological significance in pharma and drug discovery like antibacterial, antifungal, anticancer, anti-inflammatory, anti-arthritis, anti-diabetic, antioxidants, anti-proliferative, antitumor, anticancer, antiviral. The fundamentals of metal complexes are described, as well as an up-to-date outline of developments in synthesis, characterization methods, properties- chemical, thermal, optical, structural, and applications. This book also discusses the other applications of Schiff base metal complexes: as sensor (luminescent, electrochemical, and biosensor), as pigments in dying and paint industries, as photocatalyst to improve the degradation rate"--

Download or read book Essays in Chemistry written by Bradley J N. and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Transition Metal Complexes of Benzopyran 4 One Schiff Bases written by Abdel-Kader Nora S and published by LAP Lambert Academic Publishing. This book was released on 2015-01-29 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: The condensation of primary amines with aldehydes or ketones gives products known as imines or Schiff bases which contain a C=N group. Metal complexes of Schiff bases have contributed widely to the inorganic chemistry of chelate system. The extreme sensitivity of physical and chemical properties of Schiff base compounds to small changes in the substitution and in the environment, together with their ready availability justify their extraordinary wide spread applications. The chelating properties of Schiff bases towards transition metal ions were of interest to many authors. The Schiff bases are expected to exhibit variable bonding and stereochemical behavior in their complexes because of the presence of several alternates bonding donor sites. Accordingly, this book contains preparation and characterization of a series of Schiff bases derived from the condensation of benzopyran-4-one derivatives with aliphatic diamines (ethylenediamine and trimethylenediamine). The mode of chelation of some transition metal ionswith these Schiff bases was elucidated by different techniques. The book is a valuable study to inorganic chemists those research coordination compounds of transition metals.

Download or read book Reglement For Tr nbataljonen Hrn 073 1 1973 written by and published by . This book was released on 1973 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Synthesis and Characterization of New Schiff Bases Ligands with Their Transition and Actinide Metals written by Sali Nabeel Hanna Jabrou and published by . This book was released on 2019 with total page 191 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over recent years a great deal of interest has developed in new transition metal complexes of Schiff base ligand. The preparation of new ligand is the most important step in the development of metal complexes that exhibit unique properties and novel reactivity. The electron donor and electron acceptor properties of the ligand, the structural function groups and the position of the ligand in the coordination sphere, together with the reactivity of coordination compounds may be the factor for different studies. The synthesis and structural investigations of Schiff bases and their metal complexes are a considerable center of attention because of their potentially beneficial pharmacological properties and a wide variation in their mode of bonding. Metal coordination complexes have a wide variety of technological and industrial application, ranging from catalysis to anticancer drugs. In these compounds the metal atom itself may have a number of roles, based on its coordination geometry, oxidation state, and magnetic electronic and photochemical behaviors. This study presents the synthesis, characterization, and structural studies of different series of Copper and Uranium complexes of salicylaldehyde Schiff base derivatives with various organic amine compounds. The Schiff bases act as neutral and bidentate ligands, which can attach the metal through the azomethine nitrogen and furfural oxygens. These Schiff bases are prepared by iii reacting salicylaldehyde with various organic amines. In the case of most complexation reactions, highly colored precipitates were formed immediately. The complexes were found to have composition ML2 and M2L2, where M is the metal and L the organic ligand. This implies "mononuclear" structures with one metal + 2 ligands, and "binuclear" where the ligands hold two metal atoms in close proximity. The interesting molecular and crystal structural features of the Schiff base ligand called E-2-((benzo[d]thiazol-2-ylimino)methyl)phenol and its Cu(II) complex are presented in Chapter 2. Further investigations on the coordination chemistry of the Schiff base ligands are made by reacting these ligands with copper and uranium, described in Chapter 3. Another series of dicopper(II) complexes and diuranium complex of the Schiff base ligands, containing azomethine nitrogen and furfural oxygen donor group are investigated to evaluate the role of alkoxo bridge on the structures. Making the compounds with two uranium atoms leads to very high molecular weight, as a path to the highest molecular weight liquid crystal. This lays the pathway to future work for making those crystals. These dinuclear complexes are presented in chapter 4. The objective of the present study is to investigate the coordination chemistry of these ligands with Copper and Uranium. For the ligands this was done by a combination of nuclear magnetic resonance spectroscopy, infrared spectroscopy, ultraviolet-visible spectroscopy and single X-ray crystallography. The metal complexes were analyzed by the same techniques, except that in the case of uranium, all efforts to obtain single crystal for X-ray crystallography proved unsuccessful, so the molecular structure had to be ascertained from the other techniques.

Download or read book Molecular Electrostatic Potentials written by J.S. Murray and published by Elsevier. This book was released on 1996-11-22 with total page 681 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past 25 years, the molecular electrostatic potential has become firmly established as an effective guide to molecular interactions. With the recent advances in computational technology, it is currently being applied to a variety of important chemical and biological systems. Its range of applicability has expanded from primarily a focus on sites for electrophilic and nucleophilic attack to now include solvent effects, studies of zeolite, molecular cluster and crystal behavior, and the correlation and prediction of a wide range of macroscopic properties. Moreover, the increasing prominence of density functional theory has raised the molecular electrostatic potential to a new stature on a more fundamental conceptual level. It is rigorously defined in terms of the electron density, and has very interesting topological characteristics since it explicitly reflects opposing contributions from the nuclei and the electrons. This volume opens with a survey chapter by one of the original pioneers of the use of the electrostatic potential in studies of chemical reactivity, Jacopo Tomasi. Though the flow of the succeeding chapters is not stringently defined, the overall trend is that the emphasis changes gradually from methodology to applications. Chapters discussing more theoretical topics are placed near the end. Readers will find the wide variety of topics provided by an international group of authors both convincing and useful.

Download or read book Vanillin Aminoquinoline Schiff Bases and their Co II Ni II and Cu II Complexes written by Dr. S. N. Battin and published by Lulu.com. This book was released on with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Synthesis Characterization X ray Structures and Biological Activity of Some Metal Complexes of the Schiff Base 2 2 azanediylbis propane 3 1 diyl bis azanylylidene bis methanylylidene diphenol written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Synthesis Characterization and Luminescent Properties of Mono and Bi metallic Schiff Base Complexes written by Wing Kit Lo and published by . This book was released on 2004 with total page 574 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Synthesis Characterization Electrochemistry and Biological Properties of Schiff Bases and Their Metal Complexes written by Zuraini Kadir and published by . This book was released on 2010 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Synthesis and Characterization of Optically Active Schiff Base Complexes of the Lanthanides written by James J. Calienni and published by . This book was released on 1985 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Schiff Base Metal Complexes written by Pranjit Barman and published by John Wiley & Sons. This book was released on 2023-05-11 with total page 229 pages. Available in PDF, EPUB and Kindle. Book excerpt: Schiff Base Metal Complexes Schiff bases are compounds created from a condensed amino compounds, which frequently form complexes with metal ions. They have diverse applications in biology, catalysis, material science and industry. Understanding these compounds, their properties, and the available methods for synthesizing them is a key to unlocking industrial innovation. Schiff Base Metal Complexes provides a comprehensive overview of these compounds. It introduces the compounds and their properties before discussing their various synthesizing methods. A survey of existing and potential applications gives a complete picture and makes this a crucial guide for researchers and industry professionals looking to work with Schiff base complexes. Schiff Base Metal Complexes readers will also find: A systematic and organized structure designed to make information instantly accessible Detailed coverage of thermal synthesis, photochemical synthesis, and more Challenges with different methods described in order to help readers make the correct choice for their own work Schiff Base Metal Complexes is a useful reference for organic chemists, materials scientists, and researchers or industry professionals working with organometallics.