Covalent bonding

Part 1 of ebook "Ceramic materials: Science and engineering" provides readers with contents including: Part I - History and introduction; Part II - Materials; Part III - Tools; Part IV - Defects;...

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Ebook "The chemical bond II: 100 years old and getting stronger" starts with a detailed account of Lewis and Kossel’s legacy in defining the bonding in ionic and covalent compounds of main group elements and addresses the thermochemical and bond length implications of the Lewis and Kossel models.

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Ebook "The privileged pincer-metal platform: Coordination chemistry & applications" discussed primarily those aspects of the chemistry and applications of the prototypical monoanionic pincer-metal compounds. In this formulation, the metal center is covalently bonded via a central (sp2 or sp3 hybridized) C-metal bond in addition to two complementary interactions with neutral heteroatom donors.

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Part 1 book "Chemistry" by author Catherine E. Housecroft includes content: Some basic concepts, thermochemistry; atoms and atomic structure; homonuclear covalent bonds, heteronuclear diatomic molecules, polyatomic molecules - shapes, polyatomic molecules - bonding, ions, elements, mass spectrometry, introduction to spectroscopy, vibrational and rotational spectroscopies; electronic spectroscopy, NMR spectroscopy, reaction kinetics.

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Ebook "Modular system chemical bonds" is designed to introduce basic knowledge about chemical bonds. Chemists work everyday to produce new compounds to make our lives easier with the help of this basic knowledge. In the design, emphasis has been placed upon making the book student friendly. Throughout the books, colorful tables, important reactions, funny cartoons, interesting extras and reading passages are used to help explain ideas.

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In ebook "Liquid crystalline functional assemblies and their supramolecular structures" the design of new molecular architectures based on liquid crystals involves the syntheses of polymers with well-defined structures such as dendrimers and molecules with block structures. Moreover, supramolecular architectures based on liquid crystals have been intensively studied. Supramolecular liquid crystals form well-defined structures through non-covalent bonding including hydrogen bonding and ionic interactions.

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Lecture Physical science: Chapter 6 provide students with content about: electron-dot structures; the formation of ions; ionic bonds; metallic bonds; covalent bonds; polar covalent bonds; molecular polarit; molecular attractions;... Please refer to the detailed lecture content!

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Lecture Physical science: Chapter 7 provide students with content about: most materials are mixtures; the chemist’s classification of matter; solutions; solubility; soaps, detergents, and hard water; purifying the water we drink; wastewater treatment;... Please refer to the detailed lecture content!

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Enantioseparation of nineteen ß2-amino acids has been performed by liquid chromatography on chiral stationary phases based on native teicoplanin and teicoplanin aglycone covalently bonded to 2.7 μm superficially porous silica particles. Separations were carried out in unbuffered (water/methanol), buffered [aqueous triethylammonium acetate.

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Synthesis of the ionic liquid 1-allyl-3-(4-methyl-7,8-dihydroxy-2H-chromen-2-one) benzimidazolium chloride followed by the conversion of ammonium salts on the imidazole ring hooked to the coumarin group was modified by postmodification of the silica matrix where 3-chloropropyltrimethoxysilane was used as not only a surface modification agent, but also as an ATRP halogen source. The synergetic effect of charged ammonium groups as well as hydroxyl groups present on the coumarin was investigated in terms of ATRP polymerization.

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Lecture Basic chemistry: A Foundation - Chapter 11. After studying this section will help you understand: chemical bonding, structure determines properties, ionic bonds, covalent bonds, bond polarity, electronegativity, dipole moment,...

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Lecture General Chemistry 1 - Chapter 9: Molecular Geometries and Bonding Theories. After studying this section will help you understand: predict the three-dimensional shapes of molecules using the VSEPR model; determine whether a molecule is polar or nonpolar based on its geometry and the individual bond dipole moments,...

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Lecture General Chemistry 2 - Chapter 11: Theories of Covalent. After studying this section will help you understand: valence bond (VB) theory and orbital hybridization; modes of orbital overlap and the types of covalent bonds; molecular orbital (MO) theory and electron delocalization,...

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This chapter presents the following content: Polar covalent bonds in water molecules result in hydrogen bonding, four emergent properties of water contribute to Earth's suitability for life, acidic and basic conditions affect living organisms.

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Non-covalent interactions in term of hydrogen bond in complexes of chloroform with hydrogen cyanide and its fluoride derivative were investigated thoroughly by scanning the potential energy surface. The complexes of both examined systems show blue-shift at their most stable geometries. All of systems experience the contraction in C-H bond length at long distances. At specific RN-H distance, the C-H bond of CHCl3 molecule in complexes with FCN tends to be more blue-shifted than one in connection with HCN counterpart.

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Polymers containing hydrogen bonds are of great significance as they have the potential to strengthen the mechanical properties of a material through non-covalent crosslinking, which is the basis for paint and self-healing materials. In this work we describe a method to obtain a novel polymer via the coupling reaction of cyanuric chloride and a di-amine. We investigate the reaction conditions to optimise the polymerization yield and molecular weight polydispersity.

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E2HSA is a genetic fusion protein that consists of two tandem exendin-4 molecules that are covalently bonded to recombinant human serum albumin via a peptide linker.

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Adhesion mechanisms and interfacial strengths of poly(vinyl alcohol) (PVA) modified mortar and chemically active tiles with five different silane coupling agents were studied using the Fourier Transform Infrared (FTIR) technique and mechanical testing. The results revealed that small and hydrophilic silane functionalities and isocyanate groups improved interfacial strength between tiles and modified mortar while the silane bearing hydrophobic functional group decreased adhesion resistance.

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Cytosine 5 DNA methyltransferases share ten conserved motifs. Motif IV contains an absolutely conserved proline-cysteine dipeptide. The cysteine residue of this motif is involved in catalysis by forming a covalent bond with the 6-position of cytosine prior to methyl group transfer.

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We conclude that the covalent dimeric structure of the transferrin receptor is not required for the expression of the dimeric state and functional activity of the receptor.

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