Download or read book Physico Chemical Studies of Metal Complexes with N and S Donor Ligands written by Ahmad Husain and published by LAP Lambert Academic Publishing. This book was released on 2011-03 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work describes the physico-chemical studies of metal complexes with N and S donor ligands. Emphasis has been given to the synthesis and characterization of polyazamacrocycles and dithiocarbamato complexes of transition metal ions and Sn(IV). They have been characterized by FT-IR, NMR (1H, 13C and 119Sn), mass spectrometry and X-ray crystallography. The synthesis of 14-membered hexaaza macrocyclic complexes of the type [CuL]X2, [CuL1]X2, [CuL(N3)(ClO4).3/2O]n, [CuL(N3)2] and [CuL1(N3)(ClO4)]n was reported. The effect of anions on the gross geometry and chemical properties of the Cu(II) ion have been studied. The crystal structure of [Ni(L)][CoCl4] clearly establishes the cationic-anionic interaction. Rare C H---Ni anagostic interactions, generally exhibited by d8 complexes also observed. The interaction of potassium bis(2,2-dithiopiperazinato-2,2-diaminodiethylamine (K2L) with R2SnCl2 leading to the formation of bimetallic complexes of the type R4Sn2L2 have been reported. The synthesis of a mononuclear precursor complex, [(CH3)2Sn(tpdtc)] and several heterobimetallic derivatives of the type, [(CH3)2Sn(tpdtc)]MCl2 have also been reported."
Download or read book physico chemical studies on transition metal complexes on N O Donor ligands written by hussien mohamed el sagher ahmed and published by . This book was released on 1992 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physico chemical Studies on Organo transition Metal Complexes written by W. E. Lindsell and published by . This book was released on 1968 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Homo and Heterometallic 3d metal Complexes with N and N O donor Ligands written by Oleh Stetsiuk and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The thesis is devoted to the synthesis of homo- and heterometallic 3d-metal complexes with Schiff base ligands or derivatives of 1,2,4,5- tetrazine, together with the investigation of their structural and physico-chemical properties. This work can be divided in three parts. In the first part we have been mainly focused on the Schiff base ligands, derivatives of the salicylaldehyde and aminoalcohols. Thirteen heterometallic complexes were obtained and fully characterized. It has been shown that the synthesized compounds possess catalytic activity in the photochemical water oxidation, exhibit photoconducting properties in polymeric composites and can be used for the development of multifunctional materials of wide use. The second part describes the functionalization of Schiff base ligands by the introduction into their structure of electroactive tetrathiafulvalene and dithiolate moieties. Two new families of ligands were synthesized and characterized. The series of radicalcation salts and homo- and heterometallic dithiolene complexes together with the investigation of their physical properties have been described. The last part is devoted to the tetrazine based ligands. The main advantages of the tetrazine ring have been discussed. Two new ligands, derivative of picolylamine and their mono- and binuclear 3d-metal complexes are reported. In conclusion, perspectives of further research related to the described results were highlighted.
Download or read book On Being Well coordinated A Half century Of Research On Transition Metal Complexes written by John L Burmeister and published by World Scientific. This book was released on 2003-10-14 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt: This invaluable book distils the research accomplishments of Professor Fred Basolo during the five decades when he served as a world leader in the modern renaissance of inorganic chemistry. Its primary focus is on the very important area of chemistry known as coordination chemistry.Most of the elements in the periodic table are metals, and most of the chemistry of metals involves coordination chemistry. This is the case in the currently significant areas of research, including organometallic homogenous catalysis, biological reactions of metalloproteins, and even the solid state extended structures of new materials. In these systems, the metals are of primary importance because they are the sites of ligand substitution or redox reactions. In the solid materials, the coordination number of the metal and its stereochemistry are of major importance.Some fifty years of research on transition metal complexes carried out in the laboratory of Professor Basolo at Northwestern University is recorded here as selected scientific publications. The book is divided into three different major research areas, each dealing with some aspect of coordination chemistry. In each case, introductory remarks are presented which indicate what prompted the research projects and what the major accomplishments were. Although the research was of the academic, curiosity-driven type, some aspects have proven to be useful to others involved in projects that were much more applied in nature.
Download or read book Transition Metal Complexes of N 2 hydroxynenzyl Amino Acid Ligands written by Daqing Wu and published by . This book was released on 1999 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nitrogen Donor Ligands in the Coordination Chemistry of the Rare Earth and Alkaline Earth Metals written by Jelena Jenter and published by Cuvillier Verlag. This book was released on 2010-05-27 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bis(phosphinimino)methanide rare earth metal bisborohydrides, as illustrated in Scheme I, were successfully synthesized by salt metathesis reactions of [K{CH(PPh2NSiMe3)2}] with [Ln(BH4)3(THF)n] (Ln = Sc (n = 2); Ln = La, Nd, Lu (n = 3)) or in the case of yttrium by the reaction of [{(Me3SiNPPh2)2CH}YCl2]2 with NaBH4. Interestingly, the BH4- anions are ?3-coordinated in the solid state structures of 3, 4, 6 and 7, while for the scandium complex 5 two different conformational polymorphs were identified, in which either both BH4- groups are ?3-coordinated or one BH4- anion shows an ?2-coordination mode. Furthermore, complexes 3, 6 and 7 showed high activities in the ring-opening polymerization (ROP) of e-caprolactone (CL). At 0 °C, the molar mass distribution reached the narrowest values ever obtained for the ROP of CL initiated by a rare earth metal borohydride species. In collaboration with N. Meyer, rare earth metal chlorides and borohydrides of the 2,5-bis{N-(2,6-diisopropylphenyl)iminomethyl}pyrrolyl ligand were synthesized, as shown in Scheme II. The reaction of [(DIP2pyr)K] (10) with anhydrous neodymium trichloride afforded [(DIP2pyr)NdCl2(THF)]2 (12) which is dimeric in the solid state. Excitingly, the reaction of [(DIP2pyr)K] (10) with [Ln(BH4)3(THF)n] (Ln = Sc (n = 2); Ln = La, Nd, Lu (n = 3)) depends on the ionic radii of the center metals. For the larger rare earth metals lanthanum and neodymium, the expected products [(DIP2pyr)Ln(BH4)2(THF)2] (Ln = La (13), Nd (14)) were obtained; while for the smaller rare earth metals scandium and lutetium, an unusual redox reaction of a BH4- anion with one of the Schiff-base functions of the ligand was observed and the products [{DIP2pyr*-BH3}Ln(BH4)(THF)2] (Ln = Sc (15), Lu (16)) were formed (Scheme II). Moreover, the two neodymium containing complexes 12 and 14 were investigated as Ziegler-Natta catalysts for the polymerization of 1,3-butadiene to form poly-cis-1,4-butadiene, by using various cocatalyst mixtures. Very high activities and good selectivities were observed for 12. The 2,5-bis{N-(2,6-diisopropylphenyl)iminomethyl}pyrrolyl ligand was successfully introduced into the coordination chemistry of the divalent lanthanides and the alkaline earth metals. As shown in Scheme III, salt metathesis reactions of [(DIP2pyr)K] (10) with either anhydrous lanthanide diiodides or alkaline earth metal diiodides afforded the corresponding heteroleptic iodo complexes [(DIP2pyr)LnI(THF)3] (Ln = Sm (19), Eu (20), Yb (21)) or [(DIP2pyr)MI(THF)n] (M = Ca (24), Sr (22) (n = 3); Ba (23) (n = 4)). Surprisingly, all complexes 19-24 are monomeric in the solid state, independently from the ionic radii of their center metals. Instead of forming dimers, the coordination sphere of each metal center is satisfied by additionally coordinated THF molecules, which is a very rare structural motif in the chemistry of the larger divalent lanthanides and alkaline earth metals. While the (DIP2pyr)- ligands in 19-23 are ?3-coordinated in the solid state, for the calcium complex 24 an ?2-coordination mode was observed (Scheme III). Interestingly, the calcium complex 24 and the analogous ytterbium compound 21 show different structures in the solid state. In order to obtain catalytically active species, [(DIP2pyr)M{N(SiMe3)2}(THF)2] (M = Ca (25), Sr (26)) were prepared by the reaction of [(DIP2pyr)MI(THF)3] (M = Ca (24), Sr (22)) with [K{N(SiMe3)2}] (Scheme IV). Compounds 25 and 26 were investigated for the intramolecular hydroamination of aminoalkenes and one aminoalkyne. Unfortunately, both catalysts exhibit a limited reaction scope, caused by the formation of undesired side products by alkene isomerization and imine-enamine tautomerism. However, both compounds are active catalysts and show high yields and short reaction times. The highest activities were observed for the calcium complex 25 and can be compared to the results obtained with the ß-diketiminato calcium amide [{(DIPNC(Me))2CH}Ca{N(SiMe3)2}(THF)] as a catalyst. Finally, imidazolin-2-imide and cyclopentadienyl-imidazolin-2-imine rare earth metal alkyl complexes, synthesized by M. Tamm et al., were investigated for the intramolecular hydroamination of non-activated aminoalkenes and one aminoalkyne. Both compounds showed high selectivities and activities, and although they cannot compete with the metallocene analogues, the imidazolin-2-imide complexes are new and interesting examples for catalytically active post-metallocenes.
Download or read book N4 Macrocyclic Metal Complexes written by J.H. Zagal and published by Springer Science & Business Media. This book was released on 2006-07-19 with total page 828 pages. Available in PDF, EPUB and Kindle. Book excerpt: In response to significant developments in sensor science and technology, this book offers insight into the various extended applications and developments of N4 macrocycle complexes in biomimetic electrocatalysis. Covers chemical properties of electrocatalysts, use of specific species, and analytical applications.
Download or read book Synthetic and Structural Studies on Some Transition Metal Complexes of N and N O containing Donor Ligands written by Phunrawie Sroisuwan and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Metal Complexes and Metals in Macromolecules written by Dieter Wöhrle and published by Wiley-VCH. This book was released on 2003-07-09 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metals and metal complexes can form compounds with organic macromolecules that show amazing properties. As is so often the case, nature leads by example. Synthetically produced model compounds, such as phthalocyanines, porphyrines or metalloproteins, as well as metallorganic polymers have aroused much interest in materials science. Their special magnetic, electrochemical and photochemical properties open up new perspectives in microelectronics and sensors. This compact manual is aimed at all organic, inorganic, polymer and physical chemists as well as materials scientists looking for competent and detailed information on the current state of this interdisciplinary area of research. It covers all questions relating to the targeted design of metallic macromolecules, from proven synthesis methods right up to the latest strategies. It also treats major progress in the determination of their structures, the physical-chemical properties of promising compounds and their potential in microelectronics and sensors. Furthermore, the most important methods of synthesis and investigation are presented in detail in an experimental section, while a comprehensive collection of pertinent original literature round s off this unique reference on all matters relating to macromolecular metal complexes.
Download or read book Coordination Polymers written by Stuart R. Batten and published by Royal Society of Chemistry. This book was released on 2009 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: The field of coordination polymer research is now vast, & one of the fastest growing areas of chemistry in recent times, with important work being done on a variety of different aspects. This book provides a broad overview of all the major facets of modern coordination polymer science in the one place.
Download or read book Metal Ligand Interactions written by N. Russo and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 595 pages. Available in PDF, EPUB and Kindle. Book excerpt: In September 2002, a NATO-ASI was held in Cetraro (CS), Italy on the theme of "Metal-Ligand Interactions in Molecular-, Nano-, Micro-, and Macro-systems in Complex Environments". This event has followed the previous ones held in the same place in 1991, 1994 and 1998. In the present and the previous schools a broad interdisciplinary cross-section of experimental and theoretical researchers, interested in a better understanding of metal-ligand interactions from different viewpoints, was linked together to exchange experience, to review the state-of-the-art, to indicate new techniques and methods, to explore new fields and perspectives. Particular emphasis was given to the problems related with the crossing from molecular systems to nano-, macro-and micro-scale materials and to the effects of the environment on the properties of the molecular systems. The school was organized around lectures and special research seminares given by leading experts in the following fields: • metal clusters • inorganic complexes and materials • surface phenomena • adsorption and catalysis • organic and bio-inorganic systems • ab initio theory • density functional theory • classical and quantum dynamics This volume contains the formal lectures and selected contributed papers and describes the main aspects and problems tackled during the 12 days of the event.
Download or read book Introduction to Magnetic Resonance Spectroscopy ESR NMR NQR written by D. N. Sathyanarayana and published by . This book was released on 2013-11-30 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Brings together the three branches of magnetic resonance spectroscopy - electron spin resonance (ESR), nuclear magnetic resonance (NMR) and nuclear quadrupole resonance (NQR). It provides coherent and progressive coverage of the subject in a simple style. Each setion covers the physical basis of the spectroscopic method and its chemical applications.
Download or read book New S and N Donor Extended Reach Ligands and Their Metal Complexes written by and published by . This book was released on 1996 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Metal Ligand Multiple Bonds written by William A. Nugent and published by Wiley-Interscience. This book was released on 1988-11-14 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: The only comprehensive one-volume text/reference on metal-ligand multiple bonds. Stresses the unified nature of the field and includes handy new tabulations of data. The flow within each subtopic is oxygen to nitrogen to carbon. Coverage is up-to-date--virtually every subtopic leads to interesting questions for future research. Presents information otherwise scattered through hundreds of publications.
Download or read book Metal Dihydrogen and s Bond Complexes written by Gregory J. Kubas and published by Springer Science & Business Media. This book was released on 2001-08-31 with total page 479 pages. Available in PDF, EPUB and Kindle. Book excerpt: According to R.H. Crabtree, Metal Dihydrogen and sigma-Bond Complexes is described as `the definitive account of twentieth-century work in the area of sigma complexation'. It covers not only Kubas' discovery of dihydrogen coordination and the study of its structure and general properties but also discusses both the theoretical beliefs and experimental results of bonding and activation of dihydrogen on metal centers and the coordination and activation of C-H, B-H, X-H, and X-Y bonds, giving an overview of `one of the hottest areas in chemistry'.
Download or read book Transition Metal Dinitrogen Complexes written by Yoshiaki Nishibayashi and published by John Wiley & Sons. This book was released on 2019-01-25 with total page 510 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive book that explores nitrogen fixation by using transition metal-dinitrogen complexes Nitrogen fixation is one of the most prominent fields of research in chemistry. This book puts the focus on the development of catalytic ammonia formation from nitrogen gas under ambient reaction conditions that has been recently repowered by some research groups. With contributions from noted experts in the field, Transition Metal-Dinitrogen Complexes offers an important guide and comprehensive resource to the most recent research and developments on the topic of nitrogen fixation by using transition metal-dinitrogen. The book is filled with the information needed to understand the synthesis of transition metal-dinitrogen complexes and their reactivity. This important book: -Offers a resource for understanding nitrogen fixation chemistry that is essential for explosives, pharmaceuticals, dyes, and all forms of life -Includes the information needed for anyone interested in the field of nitrogen fixation by using transition metal-dinitrogen complexes -Contains state-of-the-art research on synthesis of transition metal-dinitrogen complexes and their reactivity in nitrogen fixation -Incorporates contributions from well-known specialists and experts with an editor who is an innovator in the field of dinitrogen chemistry Written for chemists and scientists with an interest in nitrogen fixation, Transition Metal-Dinitrogen Complexes is a must-have resource to the burgeoning field of nitrogen fixation by using transition metal-dinitrogen complexes.
