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Formation of 7,7-bonds

Friction and Adhesion. The coefficient of friction p. is the constant of proportionality between the normal force P between two materials in contact and the perpendicular force F required to move one of the materials relative to the other. Macroscopic friction occurs from the contact of asperities on opposing surfaces as they sHde past each other. On the atomic level friction occurs from the formation of bonds between adjacent atoms as they sHde past one another. Friction coefficients are usually measured using a sliding pin on a disk arrangement. Friction coefficients for ceramic fibers in a matrix have been measured using fiber pushout tests (53). For various material combinations (43) ... [Pg.326]

No syntheses of pyridopyrimidines by formation of bonds between two heteroatoms are possible. [Pg.215]

Benzisoxazoles, also called anthranils as derivatives of anthranilic acid, are most commonly formed by the closure of bonds C(l)—C(2) or C(2)—C(3), or the introduction of atom C(3) resulting in formation of bonds C(2)—C(3) and C(3)—C(3a). As with the 1,2-benzisoxazole series, many early structural ambiguities were present in assignments (67AHC(8)277, 62HC(17)1, 66Dis(B)102). The 3-hydroxy compound is primarily in the keto form and only recently have ethers been reported. [Pg.120]

The surface preparation must enable and promote the formation of bonds across the adherend/primer-adhesive interface. These bonds may be chemical (covalent, acid-base, van der Waals, hydrogen, etc.), physical (mechanical interlocking), diffusional (not likely with adhesive bonding to metals), or some combination of these (Chapters 7-9). [Pg.947]

D.1.3 Formation of Bonds by Addition to Carbonyl Groups Houben-Weyl... [Pg.650]

The changes in energy responsible for the formation of bonds occur when the valence electrons of atoms, the electrons in the outermost shells, move to new locations. Therefore, bond formation depends on the electronic structures of atoms discussed in Chapter 1. [Pg.181]

The focus is on the primary formation of bonds, not on subsequent reactions of the products to form other bonds. These latter reactions are covered at the places where the formation of those bonds is described. Reactions in which atoms merely change their oxidation states are not included, nor are reactions in which the same pairs of elements come together again in the product (for example, in metatheses or redistributions). Physical and spectroscopic properties or structural details of the products are not covered by the reaction volumes which are concerned with synthetic utility based on yield, economy of ingredients, purity of product, specificity, etc. The preparation of short-lived transient species is not described. [Pg.15]

This chapter describes formation of bonds between B, Al, Ga, In and Tl atoms and formation of bonds of these elements with metals and group 0 gases. [Pg.30]

This chapter describes the formation of bonds of the group-IA and group-IIA metals to the group-IA, group-IIA, group-IB and group-IIB metals, as well as to the transition and inner transition metals. [Pg.321]

Formation of Bonds Between Transition Metals and Copper or Silver. [Pg.527]

Formation of bonds between group-IB and transition metals by reacting carbonyl anions with complexed derivatives of group-IB metals is discussed in 8.3.2.1. Car-... [Pg.532]

Fundamental is that the atoms in the surface pha.se are not fully co-ordinated. These sites are often called Co-ordinatively Unsaturated Sites (CUS) . These sites chemisorb molecules because upon formation of bonds with the adsorbing molecules the Gibbs free energy is lowered. [Pg.101]

In a molecule, the presence of charges is the result of the formation of bonds that cause an electron flow from the original atoms to the new bonded atoms, and thus... [Pg.315]

The smaller electrostatic charge of the halophosphates, i.e. 2 and 1 resp., compared with the triple charge in [PO ] , gives rise to a certain anisotropy of the bonding system, which especially in the dihalophosphates causes the formation of bonds with evidently homopolar character. This is certainly one of the reasons for their stmctural variety. [Pg.52]

Electronic interactions with the formation of bonding molecular orbitals (orbital energy) and the electrostatic attraction between the nuclei of atoms and electrons. These two contributions cause the bonding forces of covalent bonds. [Pg.45]


See other pages where Formation of 7,7-bonds is mentioned: [Pg.362]    [Pg.114]    [Pg.411]    [Pg.245]    [Pg.429]    [Pg.260]    [Pg.6]    [Pg.686]    [Pg.792]    [Pg.161]    [Pg.242]    [Pg.349]    [Pg.1067]    [Pg.17]    [Pg.21]    [Pg.320]    [Pg.803]    [Pg.134]    [Pg.17]    [Pg.482]    [Pg.273]    [Pg.153]    [Pg.172]   


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A New Look at Molecules and the Formation of Covalent Bonds

Addition Reactions with Formation of Carbon-Oxygen Bonds

Appearance Potentials, Bond Dissociation Energies, and Heats of Formation

Asymmetric formation of alkene double bonds

Bond Dissociation Energies and Heats of Formation

Bond enthalpy of formation

By Formation of Three Bonds from Atom Fragments

By Formation of Two Bonds from Atom Fragments

By Formation of the C2,C3 Bond

By Formation of the Cl-C8a Bond

By Formation of the N1,C2 Bond

By Formation of the Nl,C8a Bond

Chemical Bonds The Formation of Compounds from Atoms

Crystal orbital overlap population the formation of bonds

Distributions of formation energies - the weak bond model

Fiber bonding and formation of paper structure

Forces and Potential Energy in Molecules Formation of Chemical Bonds

Formation and Elimination of Multiple Bond Functionalities

Formation and cleavage of carbon-heteroelement bonds

Formation of 1,2 and 2,3 bonds

Formation of Ar-Vinyl Bonds

Formation of Berlinite Bonded Alumina Ceramic

Formation of C-0 bonds

Formation of C-N Bonds and Related Reactions

Formation of C-N Bonds via Anti-Markovnikov Addition to Terminal Alkynes

Formation of C-N bonds

Formation of C-O Bonds

Formation of C-S bonds

Formation of C-halogen bonds

Formation of Carbon---Tl Bonds

Formation of Carbon-Heteroatom Bonds

Formation of Carbon-Phosphorus Double Bonds

Formation of Chalcogen-Nitrogen Bonds

Formation of Covalent Bonds

Formation of Exopolyhedral a Bonds between Cage Boron Atoms and Transition Elements

Formation of H-bonds

Formation of Hydrogen-Bonded Self-assembled Structures in Polar Solvents

Formation of Hydrogen-bonded Carbanions as Intermediates in Hydron Transfer between Carbon and Oxygen

Formation of M-H bond

Formation of One Bond

Formation of One Bond Adjacent to a Heteroatom

Formation of Other C-X bonds

Formation of Peptide Bonds

Formation of Pi Bonds in Ethylene and Acetylene

Formation of Single Bonds between Heavier Group 14 and 16 Elements

Formation of Si—Al Bonds

Formation of Si—Boron Bonds

Formation of Three Bonds

Formation of Three New Bonds from Acyclic Precursors

Formation of Three or Four Bonds

Formation of Two Bonds

Formation of Two Bonds Atom Fragment by Cycloaddition

Formation of Two Bonds Atom Fragment by Other Processes

Formation of Two Bonds Four-Atom Fragment and Sulfur

Formation of a Carbon-Heteroatom Bond

Formation of a,-bonds

Formation of carbon-deuterium bonds

Formation of carbon-halogen bonds

Formation of carbon-hydrogen bonds

Formation of carbon-nitrogen bonds

Formation of carbon-nitrogen bonds via organomagnesium compounds

Formation of carbon-oxygen bonds

Formation of carbon-phosphorus bonds

Formation of carbon-sulfur bonds

Formation of metal-carbon bonds (organometallic compounds)

Formation of metal-carbon bonds by other insertion reactions

Formation of siloxane bonds

Formation of specific chemical bond

Formation of the 4,5 bond

Formation of the Carbon---In Bond

Formation of the Carbon-Tin Bond

Formation of the Cobalt-Carbon Bond

Formation of the Co—C Bond

Formation of the Ge—Boron Bond

Formation of the Ge—In Bond

Formation of the Interflavanyl Bond in Oligomeric Proanthocyanidins

Formation of the Ionic Bond in NaF

Formation of the Lead—Group-IIA Bond

Formation of the N-H bond

Formation of the N-O bond

Formation of the PC Double Bond

Formation of the Pb—Boron Bond

Formation of the Si—Ga Bond

Formation of the Si—Tl Bond

Formation of the Sn—Boron Bond

Formation of the V-glycosidic bond

Formation of the nitrogen-halogen bond

Free energy of bond formation

Heat of formation bond energies

Hydrogen bonding and the formation of free radicals

Intramolecular Formation of Aryl-Alkyl Bonds

Multiple Bond Formation Synthesis of Sodium Azide

Non Conventional Methods of Peptide Bond Formation

Nonorganometallic Approaches to the Formation of a C—Pb Bond

P-Nitrophenol esters of, in peptide bond formation

Reaction Involving the Formation of Two Bonds

Reduction without formation of M-H bonds

Reductive Eliminations Organized by Type of Bond Formation

Ring Syntheses Involving Formation of Two Bonds Fragments

Suggested Mechanisms of 0-0 Bond Formation

Supramolecular Self-Assembly by Formation of Secondary Bonds

Synthesis Involving Formation of Three or More Bonds

Synthesis Involving Formation of Two Bonds

Synthesis of Naproxen and Ibuprofen (by C-H Bond Formation)

Synthesis of Pyridazines via Two Bond Formation

THE PROCESS OF BOND FORMATION

The Conditions for Formation of a Stable Three-Electron Bond

The Energetics of Ionic Bond Formation

The Formation and Nature of Ionic Bonds

The Formation of Ionic Bonds. How and When

The Formation of Nitrogen-Carbon Bonds

The Formation of Weak Intramolecular Hydrogen Bonds

The Formation of a Covalent Bond

The Process of Adhesive-Bonded Joint Formation

The Timing of Bond Formation

The formation of carbon-heteroatom bonds

The formation of disulphide bonds

Theories of Hydrogen Bond Formation

Thermodynamics of hydrogen bond formation

Typical Ring Synthesis of a Pyridine Involving Only C-Heteroatom Bond Formation

Typical Ring Synthesis of a Pyrrole Involving Only C-Heteroatom Bond Formation

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