Electrophile and Lewis Acid

Electrophile and Lewis Acid
Author: Takashiro Akitsu
Publisher: BoD – Books on Demand
Total Pages: 94
Release: 2023-08-02
Genre: Science
ISBN: 1837695717

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The subject of this book is the basics of chemistry that "want" electrons to form chemical bonds. Covalent bonds are generally represented by "lines" in structural formulas in organic chemistry. A single line of a single bond represents an "electron pair." Organic chemistry textbooks use arrows to indicate the flow of electrons to represent the creation or disappearance of bonds between atoms. There are electron-rich atoms and electron-poor atoms, which are donors (nucleophiles) and acceptors (electrophiles), respectively. Protonated ions and metal complexes form "coordination bonds." An electron pair (i.e., two electrons) is given from one atom (Lewis base, coordinating atom) to another atom (Lewis acid, metal ion), that is, there is a "bias" in donating electrons. However, once the coordination bonds are formed, the four N–H bonds of the ammonium ion are just four indistinguishable “equivalent” covalent bonds. They are classified according to the nature of the atoms that form chemical bonds, but the actual subjects are potentially wide-ranging from organic chemistry to inorganic coordination chemistry, from s- or p-block elements to d- or f-block elements, and from basics to applications.

Lewis Basicity and Affinity Scales

Lewis Basicity and Affinity Scales
Author: Christian Laurence
Publisher: John Wiley & Sons
Total Pages: 476
Release: 2009-12-23
Genre: Science
ISBN: 9780470681893

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The Lewis concept of acids and bases is discussed in every general, organic and inorganic chemistry textbook. This is usually just a descriptive treatment, as it is not possible to devise a single numerical scale suitable for all occasions. However quantitative Lewis acid-base chemistry can be developed by compiling reaction-specific basicity scales which can be used in specific branches of chemistry and biochemistry. Lewis Basicity and Affinity Scales: Data and Measurementbrings together for the first time a comprehensive range of Lewis basicity/affinity data in one volume. More than 2400 equilibrium constants of acid-base reactions, 1500 complexation enthalpies, and nearly 2000 infrared and ultraviolet shifts upon complexation are gathered together in 25 thermodynamic and spectroscopic scales of basicity and/or affinity. For each scale, the definition, the method of measurement, an exhaustive database, and a critical discussion are given. All the data have been critically examined; some have been re-measured; literature gaps have been filled by original measurements; and each scale has been made homogeneous. This collection of data will enable experimental chemists to better understand and predict the numerous chemical, physical and biological properties that depend upon Lewis basicity. Chemometricians will be able to apply their methods to the data matrices constructed from this book in order to identify the factors which influence basicity and basicity-dependent properties. In addition, measured experimental basicities and affinities are essential to computational chemists for the validation, calibration and establishment of reliable computational methods for quantifying and explaining intermolecular forces and the chemical bond. Lewis Basicity and Affinity Scales: Data and Measurement is an essential single-source desktop reference for research scientists, engineers, and students in academia, research institutes and industry, in all areas of chemistry from fundamental to applied research. "The book is a noteworthy piece of work and represents a timely and vast accumulation of knowledge regarding Lewis bases that brings together accurate thermodynamic and spectroscopic data on typical reference Lewis acids. As such, it should serve as a useful and general guide to basicity." J. AM. CHEM. SOC. 2011, 133, 642

Cooperative Catalysis

Cooperative Catalysis
Author: René Peters
Publisher: John Wiley & Sons
Total Pages: 452
Release: 2015-04-27
Genre: Technology & Engineering
ISBN: 3527336893

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Written by experts in the field, this is a much-needed overview of the rapidly emerging field of cooperative catalysis. The authors focus on the design and development of novel high-performance catalysts for applications in organic synthesis (particularly asymmetric synthesis), covering a broad range of topics, from the latest progress in Lewis acid / Br?nsted base catalysis to e.g. metal-assisted organo catalysis, cooperative metal/enzyme catalysis, and cooperative catalysis in polymerization reactions and on solid surfaces. The chapters are classified according to the type of cooperating activating groups, and describe in detail the different strategies of cooperative activation, highlighting their respective advantages and pitfalls. As a result, readers will learn about the different concepts of cooperative catalysis, their corresponding modes of operation and their applications, thus helping to find a solution to a specific synthetic catalysis problem.

The Lewis Acid-base Concepts

The Lewis Acid-base Concepts
Author: William B. Jensen
Publisher: John Wiley & Sons
Total Pages: 384
Release: 1980
Genre: Science
ISBN:

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Lewis Acid-base Reaction Chemistry

Lewis Acid-base Reaction Chemistry
Author: Mark R. Leach
Publisher:
Total Pages: 108
Release: 1999
Genre: Chemical reaction, Conditions and laws of
ISBN:

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Chemistry, Life, the Universe and Everything

Chemistry, Life, the Universe and Everything
Author: Melanie Cooper
Publisher:
Total Pages: 218
Release: 2014-06-27
Genre:
ISBN: 9781495240911

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As you can see, this "molecular formula is not very informative, it tells us little or nothing about their structure, and suggests that all proteins are similar, which is confusing since they carry out so many different roles.

Organic Chemistry 1

Organic Chemistry 1
Author: Martin Walker
Publisher: State University of New York Oer Services
Total Pages: 382
Release: 2018-08-11
Genre: Chemistry, Organic
ISBN: 9781641760317

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Basic Principles of Organic Chemistry

Basic Principles of Organic Chemistry
Author: John D. Roberts
Publisher:
Total Pages: 1596
Release: 1977
Genre: Chemistry, Organic
ISBN: 9780805383218

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Introduction what is organic chemistry all about?; Structural organic chemistry the shapes of molecules functional groups; Organic nomenclature; Alkanes; Stereoisomerism of organic molecules; Bonding in organic molecules atomic-orbital models; More on nomenclature compounds other than hydrocarbons; Nucleophilic substitution and elimination reactions; Separation and purification identification of organic compounds by spectroscopic techniques; Alkenes and alkynes. Ionic and radical addition reactions; Alkenes and alkynes; Oxidation and reduction reactions; Acidity or alkynes.

Fundamentals of Asymmetric Catalysis

Fundamentals of Asymmetric Catalysis
Author: Patrick J. Walsh
Publisher: University Science Books
Total Pages: 692
Release: 2009-01-02
Genre: Science
ISBN: 9781891389542

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This work describes the essential aspects of enantioselective catalysis, with chapters organised by concept rather than by reaction type. Each concept is supported by examples to give the reader broad exposure to a wide range of catalysts, reactions and reaction mechanisms.

Superelectrophiles and Their Chemistry

Superelectrophiles and Their Chemistry
Author: George A. Olah
Publisher: John Wiley & Sons
Total Pages: 312
Release: 2008-01-03
Genre: Science
ISBN: 0470185112

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Superelectrophiles and Their Chemistry contains, for the first-time, a discussion of the basics of this emerging field of organic chemistry, alongside tools to help the reader apply the chemistry. Specific tools include an evaluation of the ways to increase the strength of electrophiles, the classification of superelectrophiles, the solvation issues, a review of methods for studying superelectrophilicity, with details of the superelectrophiles that have been identified and studied. Additional information includes substituent effects in activation of superelectrophiles, and solvation in chemical reactions, as well as an insightful look into future applications.