- 関
- binding energy
WordNet
- a certificate of debt (usually interest-bearing or discounted) that is issued by a government or corporation in order to raise money; the issuer is required to pay a fixed sum annually until maturity and then a fixed sum to repay the principal (同)bond certificate
- a superior quality of strong durable white writing paper; originally made for printing documents (同)bond_paper
- issue bonds on
- bring together in a common cause or emotion; "The death of their child had drawn them together" (同)bring together, draw together
- (physics) a thermodynamic quantity equivalent to the capacity of a physical system to do work; the units of energy are joules or ergs; "energy can take a wide variety of forms" (同)free_energy
- a healthy capacity for vigorous activity; "jogging works off my excess energy"; "he seemed full of vim and vigor" (同)vim, vitality
- any source of usable power; "the DOE is responsible for maintaining the energy policy"
- an imaginative lively style (especially style of writing); "his writing conveys great energy"; "a remarkable muscularity of style" (同)muscularity, vigor, vigour, vim
- enterprising or ambitious drive; "Europeans often laugh at American energy" (同)push, get-up-and-go
- forceful exertion; "he plays tennis with great energy"; "hes full of zip" (同)vigor, vigour, zip
- a close personal relationship that forms between people (as between husband and wife or parent and child)
- fastening firmly together (同)soldering
- (dentistry) a technique for repairing a tooth; resinous material is applied to the surface of the tooth where it adheres to the tooths enamel
- United States civil rights leader who was elected to the legislature in Georgia but was barred from taking his seat because he opposed the Vietnam War (born 1940) (同)Julian Bond
- British secret operative 007 in novels by Ian Fleming (同)James Bond
PrepTutorEJDIC
- 〈C〉『縛る物』 / 《通例複数形で》『束縛』,拘束,かせ / 《しばしば複数形で》(血縁,義理などの)『きずな』,縁 / 〈C〉契約 / 〈C〉『証書』,証文;『債券』,公債 / 〈U〉(石・れんがなどの)つなぎ方,組積み / 〈U〉保税倉庫入り / 〈U〉接着,接合;接着剤,接合剤 / 〈品物〉'を'担保とする / …‘の'保証人となる / (債券などを発行して)…‘の'支払いを保証する / …'を'つなぐ,結ぶ(bind together) / つながる
- (一般的な力としての)『精力』,気力,元気 / (個人の)精力,活動力 / エネルギー
- 合板の / 公債(債券)で保証された;担保付きの / (輸入貨物が)保税倉庫留め置きの
Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア(Wikipedia)』「2012/12/16 14:57:38」(JST)
[Wiki en表示]
In chemistry, bond energy (E) is the measure of bond strength in a chemical bond. It is the heat required to break one Mole (unit) of molecules into their individual atoms.[1] For example, the carbon-hydrogen bond energy in methane E(C–H) is the enthalpy change involved with breaking up one molecule of methane into a carbon atom and 4 hydrogen radicals divided by 4.
Bond energy (E) should not be confused with bond-dissociation energy. It is a roughly transferable property, and enthalpy of formation can typically be roughly approximated by simply adding tabulated values for bond energies for all bonds in a molecule, with an error of sometimes just a few percent. However, to get a better approximation is much more difficult.
Contents
- 1 Bond energy/distance correlation
- 2 Factors affecting ionic bond energy
- 3 See also
- 4 References
- 5 External links
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Bond energy/distance correlation
Bond strength (energy) can be directly related to the bond length/bond distance. Therefore, we can use the metallic radius, ionic radius, or covalent radius of each atom in the molecule to determine the bond strength. For example, the covalent radius of boron is estimated at 83.0 pm, but the bond length of B–B in B2Cl4 is 175 pm, a significantly larger value. This would indicate that the bond between the two boron atoms is a rather weak single bond. In another example, the metallic radius of rhenium is 137.5 pm, with a Re–Re bond length of 224 pm in the compound Re2Cl8. From this data, we can conclude that the bond is a very strong bond or a quadruple bond. This method of determination is most useful for covalently bonded compounds.[2]
Factors affecting ionic bond energy
There are several contributing factors but usually the most important is the difference in the electronegativity of the two atoms bonding together.[3]
See also
- Nuclear binding energy
- Electron binding energy
- Lattice energy
References
- ^ Frey, Paul Reheard. College chemistry 3rd Edition Prentice-Hall. 1965 p. 134.
- ^ Handbook of Chemistry & Physics 65th Edition CRC Press ISBN 0-8493-0465-2.
- ^ Alcock, N.W. Bonding and Structure: structural principles in inorganic and organic chemistry Ellis Horwood Ltd., New York. 1990 pp. 40-42.
- ^ Bond Energy. 11 July 2003.
External links
- Table of Bond Energies.
- Table of standard bond energies and bond-dissociation energies.
UpToDate Contents
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English Journal
- Vogler EA.SourceDepartments of Materials Science and Engineering and Bioengineering, The Pennsylvania State University, University Park, PA 16802, USA.
- Biomaterials.Biomaterials.2011 Oct;32(28):6670-5. Epub 2011 Jun 17.
- A minimum in the biological response to materials that is observed to occur within a narrow surface energy range is related to the properties of water at these biology-contacting surfaces. Wetting energetics are calculated using a published theory from which it is further estimated that water molecu
- PMID 21684003
- Energetics of hydrogen bond switch, residue burial and cavity analysis reveals molecular basis of improved heparin binding to antithrombin.
- Singh P, Singh K, Jairajpuri MA.SourceProtein Conformation and Enzymology Lab, Department of Biosciences, Jamia Millia Islamia University, New-Delhi-110025, India. m_jairajpuri.bi@jmi.ac.in.
- Journal of biomolecular structure & dynamics.J Biomol Struct Dyn.2011 Oct;29(2):339-50.
- Antithrombin III (ATIII) is the main inhibitor of the coagulation proteases like factor Xa and thrombin. Anticoagulant activity of ATIII is increased by several thousand folds when activated by vascular wall heparan sulfate proteoglycans (HSPGs) and pharmaceutical heparins. ATIII isoforms in human p
- PMID 21875153
Japanese Journal
- Vertical Liquid Crystal Orientation on Amorphous Tantalum Pentoxide Surfaces Depending on Anisotropic Dipole--Dipole Interaction via Ion Beam Irradiation
- Lee Jong-Jin,Kim Hyung-Jun,Kang Young-Gu [他],Kim Young-Hwan,Park Hong-Gyu,Kim Byoung-Yong,Seo Dae-Shik
- Jpn J Appl Phys 50(3), 031701-031701-4, 2011-03-25
- … By analyzing measurements by X-ray photoelectron spectroscopy (XPS), we confirmed the bond breaking, as detected from the O 1s spectra, which caused an isotropic dipole--dipole interaction between the LC molecules and the Ta2O5 alignment film to uniformly align the vertical LC molecular orientation as a function of IB energy density. …
- NAID 150000055363
- First-Principles Study on Structural Properties of GeO2 and SiO2 under Compression and Expansion Pressure
- Saito Shoichiro,Ono Tomoya
- Jpn J Appl Phys 50(2), 021503-021503-5, 2011-02-25
- … First-principles total-energy calculations reveal that the rutile structure is the most stable phase among the phases of GeO2, while SiO2 preferentially forms quartz. … Moreover, in the case of quartz GeO2 and cristobalite GeO2, all O--Ge--O bond angles vary when the volume of the GeO2 bulk changes from the equilibrium point, which causes further deformation of tetrahedra. …
- NAID 150000055288
Related Links
- In chemistry, bond energy (E) is a measure of bond strength in a chemical bond. It is the heat required to break one Mole (unit) of molecules into their individual atoms. For example, the carbon-hydrogen bond energy in methane E(C?H) is the ...
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