Download or read book Alkaline Earth Metal Compounds written by Sjoerd Harder and published by Springer. This book was released on 2013-07-20 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: The series Topics in Organometallic Chemistry presents critical overviews of research results in organometallic chemistry. As our understanding of organometallic structure, properties and mechanisms increases, new ways are opened for the design of organometallic compounds and reactions tailored to the needs of such diverse areas as organic synthesis, medical research, biology and materials science. Thus the scope of coverage includes a broad range of topics in pure and applied organometallic chemistry, where new breakthroughs are being achieved that are of significance to a larger scientific audience. The individual volumes of Topics in Organometallic Chemistry are thematic. Review articles are generally invited by the volume editors.

Download or read book Synthesis Structures and Reactivity of Rare Earth and Alkaline Earth Aryloxides written by Joshua P. Townley and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The focus of this Thesis is on the synthesis and characterisation of aryloxides of the lanthanoid and alkaline earth metals with an emphasis on structural characterisation. One of the key objectives has been to explore the boundaries of the redox transmetallation/protolysis (RTP) reaction (formerly known as redox transmetallation/ligand exchange), and this is the focus of Chapter 2. Redox transmetallation/protolysis reactions were performed in the non-donor solvents toluene and hexane, in which success has not previously been achieved, and the reaction rates monitored by 19F NMR spectroscopy. A donor-solvent free pathway is proposed in which an intermediate of the type [Ln(C6F5)2(HOAr)n] is formed, and plays a pivotal role in determining the speed of the reaction. The application of this method for the synthesis of homoleptic products was established by the synthesis of the known homoleptic compounds [Ln(2,6-dpp)3] (Ln = La, Pr, Nd), [Ba2(2,6- dpp)4] (2,6-dppH = 2,6-diphenylphenol) and [La(2,6-dip)3]2 (2,6-dipH = 2,6- diisopropylphenol) as well as the isolation of new compounds [La4(3,5-dbp)12(3,5- dbpH)] and [Nd4(3,5-dbp)12(3,5-dbpH)]/[Nd4(3,5-dbp)10(3,5-dbpH)4(OH)2] (3,5- dbpH = 3,5-di-tert-butylphenol). A series of lanthanoid aryloxide complexes of the type [Ln(2,4-dbp)3(THF)3] (Ln = La, Pr, Nd, Gd, Er) were prepared by RTP reactions with 2,4-di-tert-butylphenol (2,4-dbpH) and structurally characterised (Chapter 3). Reaction in DME with neodymium afforded the seven-coordinate [Nd(2,4-dbp)3(DME)2], while the dinuclear [Yb2(2,4-dbp)6(DME)2] was obtained by an analogous reaction with ytterbium. Recrystallising the THF derivatives from toluene or hexane resulted in the loss of THF and the formation of the dinuclear [Ln2(2,4-dbp)6(THF)2] (Ln = Nd, Er). The structurally similar [Nd2(2,4-dbp)6(2,4-dbpH)2] was the product of a thermally induced protolysis reaction between the metal and the phenol. A RTP reaction between ytterbium metal and 2-tert-butylphenol (2-tbpH) did not give a solid product, however, the complex [Yb2(2-tbp)6(THF)2] was obtained after crystallisation from toluene. Extending this chemistry to the heavy alkaline earth metals, calcium, strontium and barium resulted in the isolation of a group of new and interesting compounds ii (Chapter 4). Reactions in THF afforded [Ca(2,4-dbp)2(THF)4] and [Sr3(2,4- dbp)6(THF)6], while analogous reactions in DME gave the remarkable [Ca2(2,4- dbp)4(DME)5], containing a bridging molecule of DME, and the asymmetrically bridged [Sr2(2,4-dbp)4(DME)3]. Reactions with the larger barium yielded cluster complexes [Ba8(2,4-dbp)12(OH)4(DME)4] and [Ba8(2,4-dbp)12(OH)4]. Chapter 5 details the synthesis and characterisation of a series of lanthanoid and alkaline earth calixarene complexes. Reactions between the lanthanoid metals and p- But-calix[4]arene in the presence of bis(pentafluorophenyl)mercury yielded [Ln(calix[4]OH)(THF)]2 complexes (Ln = Nd, Yb). Attempts to isolate divalent products through the strategic use of the p-But-calix[4](Et)2(OH)2 were unsuccessful, instead affording a series of chloride-containing complexes of the type [Ln(calix[4]Et2)Cl(THF)]2, in which the presence of the chloride arose from contamination of the starting material. A reaction between strontium metal and p- But-calix[4](OH)4 in the presence of bis(pentafluorophenyl)mercury afforded [Sr4(calix[4](OH)2)4(OH2)4(THF)4] after partial hydrolysis. A number of compounds prepared in the course of this work ([Nd(2,4- dbp)3(THF)3], [Gd(2,4-dbp)3(THF)3], [Ca2(2,4-dbp)4(DME)5], [Sr2(2,4- dbp)4(DME)3]) as well as the known compounds [Yb(ttfpz)2(THF)4], [Sm(dippForm)2(THF)2], [La(xylForm)3(THF)], [Sm(xylForm)3] and [Sm(mesForm)3] were taken to Oxford University and tested as potential initiators for the ring-opening polymerisation of rac-lactide. All were found to be capable of initiating polymerisation, albeit with varying degrees of success. Most systems could be improved by the introduction of a co-initiator (or chain-transfer agent) such as benzyl alcohol or benzylamine to promote immortal polymerisation. Chapter 6 provides detailed discussions of the polymer features, as well as kinetics studies of the rate of polymerisation in the cases of [Nd(2,4-dbp)3(THF)3], [Ca2(2,4- dbp)4(DME)5], [Sr2(2,4-dbp)4(DME)3] and [Sm(dippForm)2(THF)2] in the presence of benzylamine. Furthermore a structure-activity relationship for the alkaline earth initiators is discussed.

Download or read book Activated Metals in Organic Synthesis written by P. Cintas and published by CRC Press. This book was released on 2020-01-29 with total page 247 pages. Available in PDF, EPUB and Kindle. Book excerpt: Activated Metals in Organic Synthesis discusses fundamental principles of the generation of activated, highly reactive metals, and their applications in organic synthesis. Following an introductory chapter on basic forms of metals the chapters in Part 1 are devoted to common strategies utilized for the preparation of active metals. These strategies include vaporization and subsequent co-condensation of metal atoms, in addition to depassivating methods employed commonly in laboratory syntheses. Chapters in Part 2 discuss relevant organic transformations in which metal activation plays a crucial role. Specific topics covered include metal-induced reductive methods; pinacolic, Reformatsky-, and Barbier-type reactions; McMurry ketone-olefin coupling; and the Bernet-Vasella reaction. Each chapter is followed by literature citations ranging from specific references to significant reviews. Many structural formulas are provided, making it easy to follow each synthesis. The book will be an important reference for students, organic chemists, and researchers in all areas of organometallic chemistry.

Download or read book Encapsulated Alkaline earth Organometallics as Controlled Sources of Calcium Strontium and Barium Ions written by and published by . This book was released on 1994 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cyclopentadienyl rings with substituents that interlock with those of a second ring form encapsulated metallocenes ((C5R5)2M) with the alkaline-earth metals (Ca, Sr, Ba). These metallocenes are conveniently manipulated, volatile, hydrocarbon-soluble sources of the metal cations, which make the compounds attractive as precursors to metal oxides and ceramics. The physical properties of the metallocenes are highly sensitive to the degree of encapsulation and to the geometry of the encapsulating ligands; more flexible rings reduce the ability of complexes to pack into lattices, and oils and waxes will be formed. Other main-group metals (Sn, Pb) and lanthanide elements (Sm) can be encapsulated with the same ligands used for the alkaline-earths. Under the proper conditions, ring can be displaced from an encapsulated metallocene, exposing the metal center and activating the complex. Disproportionation of the resulting mono(ring) complexes (C5R5)M(E) into symmetrical (C5R5)2M and M(E)2 species can be blocked. Ligand synergism in mono(ring) complexes can enhance their chemical and thermal stabilities relative to those of the parent symmetrical species. Alkaline-earth, Calcium, Strontium, Barium, Organometallic, Metallocenes, Materials.

Download or read book Direct Synthesis of Metal Complexes written by B.I. Kharisov and published by Elsevier. This book was released on 2018-04-19 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt: Direct Synthesis of Metal Complexes provides in-depth coverage of the direct synthesis of coordination and organometallic compounds. The work is primarily organized by methods, but also covers highly relevant complexes, such as metal-polymer coordination compounds. This updated reference discusses recent developments in cryosynthesis, electrosynthesis, and tribosynthesis (popular as it doesn't require organic solvents), with special attention paid to 'greener' methodologies and approaches. Additionally, the book describes physical methods of zero-valent metal interaction with organic matter, including sputtering, ultrasonic treatment and synthesis in ionic liquids. The book presents completely new content as a follow-up to the 1999 Elsevier Science publication Direct Synthesis of Coordination and Organometallic Compounds that was edited by Dr. Garnovskii and Dr. Kharisov. - Covers current methods and techniques of metal interactions with organic media leading to metal chelates, adducts, di- and polymetallic complexes, metal-containing macrocycles, supported coordination compounds (i.e., metal complexes on carbon nanotubes), and more - Describes reactivities of distinct forms of elemental metals (powders, sheets, nanoparticles (including a host of less-common metal nanostructures) with organic phase (liquid, solid and gaseous) and water - Includes experimental procedures, with examples of direct synthesis, at the end of each chapter

Download or read book Encyclopedia of the Alkaline Earth Compounds written by Richard C. Ropp and published by Newnes. This book was released on 2012-12-31 with total page 1201 pages. Available in PDF, EPUB and Kindle. Book excerpt: Encyclopedia of the Alkaline Earth Compounds is a compilation describing the physical and chemical properties of all of the alkaline earth compounds that have been elucidated to date in the scientific literature. These compounds are used in applications such as LEDs and electronic devices such as smart phones and tablet computers. Preparation methods for each compound are presented to show which techniques have been successful. Structures and phase diagrams are presented where applicable to aid in understanding the complexities of the topics discussed. With concise descriptions presenting the chemical, physical and electrical properties of any given compound, this subject matter will serve as an introduction to the field. This compendium is vital for students and scientific researchers in all fields of scientific endeavors, including non-chemists. 2013 Honorable Mention in Chemistry & Physics from the Association of American Publishers' PROSE Awards Presents a systematic coverage of all known alkaline earth inorganic compounds and their properties Provides a clear, consistent presentation based on groups facilitatating easy comparisons Includes the structure of all the compounds in high quality full-color graphics Summarizes all currently known properties of the transition metals compounds Lists the uses and applications of these compounds in electronics, energy, and catalysis

Download or read book Technical Abstract Bulletin written by Defense Documentation Center (U.S.) and published by . This book was released on 1963 with total page 1032 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Alkaline Earth Metals written by Bridget Heos and published by The Rosen Publishing Group, Inc. This book was released on 2009-08-15 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explains the characteristics of alkaline earth metals, where they are found, how they are used by humans, and their relationship to other elements found in the periodic table.

Download or read book Comprehensive Organometallic Chemistry II written by E.W. Abel and published by Pergamon. This book was released on 1995-10-13 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt: . Covers the literature in depth from 1982-1994, thus building on the original nine volumes . 14 volume set . 8750 pages approx . Volumes 1-9 provide a detailed account of the organic chemistry of both main group and transition elements . Volume 10 deals with compounds containing heteronuclear metal-metal bonds . Volume 11 describes the use of main group organometallic compounds in organic synthesis . Volume 12 is devoted to the use of transition metal orgnometallic compounds in organic synthesis . Volume 13 consists of a comprehensive index of all organometallic structures studied by diffraction methods . Volume 14 contains subject and formula indexes covering Volumes 1-12

Download or read book Polyhedron written by and published by . This book was released on 1992 with total page 1100 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1976 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dissertation Abstracts International written by and published by . This book was released on 2004 with total page 820 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book INIS Atomindex written by and published by . This book was released on 1982 with total page 1240 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Alkali Metals written by Kristi Lew and published by The Rosen Publishing Group, Inc. This book was released on 2009-08-15 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explains the characteristics of alkali metals, where they are found, how they are used by humans, and their relationship to other elements found in the periodic table.

Download or read book Alkali and Alkaline Earth Metals Second Edition written by Monica Halka and published by Infobase Holdings, Inc. This book was released on 2019-12-01 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scientists categorize the chemical elements as metals, nonmetals, and metalloids largely based on the elements' abilities to conduct electricity at normal temperatures and pressures, but there are other distinctions taken into account when classifying the elements in the periodic table. The alkali metals, for example, are metals, but have such special properties that they are given their own classification. The same is true for the alkaline earths. Alkali and Alkaline Earth Metals, Second Edition presents the current scientific understanding of the physics, chemistry, geology, and biology of these two families of elements, including how they are synthesized in the universe, when and how they were discovered, and where they are found on Earth. With information pertaining to the discovery and naming of these elements as well as new developments and dilemmas, this newly updated eBook examines how humans use alkalis and alkaline earths and their benefits and challenges to society, health, and the environment. Lithium, sodium, potassium, magnesium, and calcium are only a few of the topics covered in this full-color resource. Alkali and Alkaline Earth Metals, Second Edition provides students and scientists with an up-to-date understanding of each of the nonmetals—where they came from, how they fit into our current technological society, and where they may lead us.

Download or read book Index to Theses with Abstracts Accepted for Higher Degrees by the Universities of Great Britain and Ireland and the Council for National Academic Awards written by and published by . This book was released on 2001 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt: Theses on any subject submitted by the academic libraries in the UK and Ireland.

Download or read book The Chemical Trade Journal and Chemical Engineer written by G Kelville Davis and published by . This book was released on 1928 with total page 822 pages. Available in PDF, EPUB and Kindle. Book excerpt: