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Strength of a chemical bond
chemistry, bond energy (BE) is one measure of the strength of a chemical bond. It is sometimes called the mean bond, bond enthalpy, average bond enthalpy
Bond_energy
Standard enthalpy change when a chemical bond is cleaved by homolysis
The bond dissociation energy (BDE, D0, or DH°) is one measure of the strength of a chemical bond A−B. It can be defined as the standard enthalpy change
Bond_dissociation_energy
Chemical bonding involving attraction between ions
very stable. Ionic bonds have high bond energy. Bond energy is the mean amount of energy required to break the bond in the gaseous state. Most ionic compounds
Ionic_bonding
Association of atoms to form chemical compounds
between the two atomic nuclei. Energy is released by bond formation. This is not as a result of reduction in potential energy, because the attraction of the
Chemical_bond
Chemical bond by sharing of electron pairs
A covalent bond is a chemical bond that involves the sharing of electrons to form electron pairs between atoms. These electron pairs are known as shared
Covalent_bond
Covalent chemical bond between hydrogen and carbon atoms
making them stable. Carbon–hydrogen bonds have a bond length of about 1.09 Å (1.09 × 10−10 m) and a bond energy of about 413 kJ/mol (see table below). Using
Carbon–hydrogen_bond
State of an immobilized atom in chemistry
that originally contributed to the bond, leading to two unpaired dangling bonds. A dangling bond adds an extra energy level between the valence band and
Dangling_bond
Tendency of an atom to attract a shared pair of electrons
quantitatively estimate the bond energy, and the sign and magnitude of a bond's chemical polarity, which characterizes a bond along the continuous scale
Electronegativity
Method for describing the electronic structure of molecules using quantum mechanics
enough reduction in energy of electrons to make significant bonding. Molecular orbital theory was developed in the years after valence bond theory had been
Molecular_orbital_theory
Chemical reaction that releases energy as light or heat
ΔH⚬ values are related to bond energies to a good approximation by: ΔH⚬ = (total bond energy of reactants) − (total bond energy of products) In an exothermic
Exothermic_reaction
Energy required to separate particles
In physics and chemistry, binding energy is the smallest amount of energy required to remove a particle from a system of particles or to disassemble a
Binding_energy
Thermodynamic process that releases energy to its surroundings
absorbs energy, usually in the form of heat. The concept is frequently applied in the physical sciences to chemical reactions where chemical bond energy is
Exothermic_process
Energy needed to remove an electron
recorded ionization energy for a stable chemical compound. Bond-dissociation energy, the measure of the strength of a chemical bond calculated through
Ionization_energy
Wave-like behavior of an electron in a molecule
which have an energy higher than the energy of their constituent atomic orbitals, and so oppose the bonding of the molecule, and non-bonding orbitals which
Molecular_orbital
Proposed class of chemical bonds
bond energy. For heteronuclear bonds, A−X, Pauling estimated the covalent contribution to the bond dissociation energy as being the mean of the bond dissociation
Charge-shift_bond
Difference between the number of bonds and anti-bonds in a molecule
the bond order, the stronger the bond. Bond orders of one-half may be stable, as shown by the stability of H+2 (bond length 106 pm, bond energy 269 kJ/mol)
Bond_order
James Bond is a fictional character created by British novelist Ian Fleming in 1953. A British secret agent working for MI6 under the codename 007, Bond has
List_of_James_Bond_films
Splitting of a chemical bond
The bond-dissociation energy of a bond is the amount of energy required to cleave the bond homolytically. This enthalpy change is one measure of bond strength
Bond_cleavage
Approach to analyzing reaction energies
molecule then we first have to consider its bond dissociation enthalpy (see also bond energy). The energy required to remove one or more electrons to
Born–Haber_cycle
Wafer bonding process in semiconductor production
Direct bonding, or fusion bonding, is a wafer bonding process without any additional intermediate layers. It is based on chemical bonds between two surfaces
Direct_bonding
activation prior to bonding has the typical advantage that no intermediate layer is needed and sufficiently high bonding energy is achieved after annealing
Plasma-activated_bonding
Type of chemical bond
sigma and one pi bond, has a bond energy less than twice that of a C–C single bond, indicating that the stability added by the pi bond is less than the
Pi_bond
Type of chemical compounds
in acidity correlate with bond energies, the weaker the H-X bond, the stronger the acid. For example, there is a weak bond between hydrogen and iodine
Binary_acid
Intermolecular attraction between a hydrogen donor-and-acceptor pair
In chemistry, a hydrogen bond (H-bond) is a specific type of molecular interaction that exhibits partial covalent character and cannot be described as
Hydrogen_bond
Diatomic molecule
gas phase. It has a bond order of 1, an internuclear separation of 267.3 pm and a bond energy of 102 kJ/mol or 1.06 eV in each bond. The electron configuration
Dilithium
Energy released from chemical substances
chemical energy include batteries, food, and gasoline (as well as oxygen gas, which is of high chemical energy due to its relatively weak double bond and indispensable
Chemical_energy
Model of electronic band structures of solids
elements, which would simply be called the bond energies by a chemist. In general there are a number of atomic energy levels and atomic orbitals involved in
Tight_binding
Approximate quantum chemistry model
threshold for hydrogen bonding. E d i s p = ∑ k γ k A k {\displaystyle E_{disp}=\sum _{k}\gamma _{k}A_{k}} The COSMO-RS dispersion energy of a solute depends
COSMO-RS
Covalent bond between amino acids in a protein chain
the partial double bond be broken, so that the activation energy is roughly 80 kJ/mol (20 kcal/mol). However, the activation energy can be lowered (and
Peptide_bond
Chemical reaction with oxidation state changes
reorganization energy. Marcus received the 1992 Nobel Prize in Chemistry for the theory. Analysis of bond energies and ionization energies in water allows
Redox
Order of bacteria
from light via photosynthesis — it does not use light to increase the bond energy of an electron pair. Rather, a mechanism involving proteorhodopsin (including
Pelagibacterales
System of connected p-orbitals with delocalized electrons in a molecule
to most (>90%) of the π bond energy, there are also a number of other minor contributors to the wavefunction in the valence bond treatment, including the
Conjugated_system
Organometallic compound containing carbon–silicon bonds
thus susceptible to nucleophilic attack by O−, Cl−, or F−; the energy of an Si–O bond in particular is strikingly high. This feature is exploited in many
Organosilicon_chemistry
Single-part rocket propellant
consisting of chemicals that release energy through exothermic chemical decomposition. The molecular bond energy of the monopropellant is released usually
Monopropellant
Enthalpy difference due to chemical reaction, reduced to standard states
be approximately interpreted in terms of the total of the chemical bond energies for bonds broken and bonds formed. For a generic chemical reaction ν
Standard_enthalpy_of_reaction
Mixing (superposition) of atomic orbitals
different energies, shapes, etc., than the component atomic orbitals) suitable for the pairing of electrons to form chemical bonds in valence bond theory
Orbital_hybridisation
Triatomic molecule
chemical bonding scheme is nonetheless complex as many of its bonding properties such as bond angle, ionization energy, and electronic state energy cannot
Chemical_bonding_of_water
High energy bond in phosphate-containing biomolecules
high-energy bonds in the sense that free energy is released when they are hydrolyzed, for the reasons given above. Lipmann’s term "high-energy bond" and
High-energy_phosphate
Energy change upon the formation of one mole of ionic solid
Madelung constant, has a bond radius of 275 picometers and a lattice energy of −3054 kJ/mol, while sodium chloride (NaCl) has a bond radius of 283 picometers
Lattice_energy
Chemical bond
very short, strong bond (112.8 pm), and acylium ions, R–C≡O+ (typically 110–112 pm). Such triple bonds have a very high bond energy, even higher than N≡N
Carbon–oxygen_bond
Catalyzed organic reactions that produce an organoboron compound
bond has a bond length of about 1.09 Å, and a bond energy of about 413 kJ/mol. The C–B bond is therefore a useful intermediate as a bond that replaces
Borylation
Group of chemical elements
chemical bond energy moving from top to bottom of the periodic table column with fluorine deviating slightly. It follows a trend in having the highest bond energy
Halogen
Graphical representation of energy flows in physical systems
A bond graph is a graphical representation of the energy flows though and between physical dynamical systems including those in the electrical, mechanical
Bond_graph
Chemical element with atomic number 14 (Si)
Si–Si bond compared to the C–C bond: the average Si–Si bond energy is approximately 226 kJ/mol, compared to a value of 356 kJ/mol for the C–C bond. This
Silicon
1974 James Bond film by Guy Hamilton
the same name, the film has Bond sent after the Solex Agitator, a breakthrough technological solution to contemporary energy shortages, while in a game
The Man with the Golden Gun (film)
The_Man_with_the_Golden_Gun_(film)
this reaction is isodesmic the energy change in this example also depends on the difference in bond energy of the C-X bond in the base and conjugate acid
Isodesmic_reaction
SI derived unit of molar energy
are usually of the order of 10 kJ·mol−1, bond energies are of the order of 100 kJ·mol−1, and ionization energies of the order of 1000 kJ·mol−1. For this
Joule_per_mole
2024 video game
Whilst Cozette reconciles with Connie, Mario and Luigi work to acquire Bond Energy from companions they've encountered in their quest, including the now-reformed
Mario_&_Luigi:_Brothership
Substance which explodes when exposed to small amounts of energy
very stable—that is, the triple bond that holds N2 together is very strong, and therefore has a great deal of bond energy—the nitro compounds themselves
Contact_explosive
Force of attraction or repulsion between molecules and neighboring particles
3/5 O(g) 610 kJ/mol Calculated on the basis of energy required to release 1 mole of atoms. e.g. Kr-F bond in KrF2 is 50 kJ/mol, and 3 atoms are released
Intermolecular_force
Breaking a molecular bond such that both electrons remain with one species
The energy required to break the bond is called the heterolytic bond dissociation energy, which is similar (but not equivalent) to homolytic bond dissociation
Heterolysis_(chemistry)
Chemical compound
of difluorine to atomic fluorine requires cleaving a F–F bond with a bond dissociation energy of 150 kJ/mol (36 kcal/mol). Consequently, KrF2 is a good
Krypton_difluoride
Chemical compound
atom. The Pb–Cl covalent bonds have been measured to be 247 pm and the bond energy is 243 kJ⋅mol−1. Lead tetrachloride can be made by reacting lead(II)
Lead(IV)_chloride
qualitative way of determining dangling bond energy levels is with Harrison diagrams. Metals have non-directional bonding and a small Debye length which, due
Carrier_scattering
Type of chemical bond
group, the bonding delta interaction is the highest energy bonding interaction, followed by the bonding pi, and sigma interactions. The resultant antibonding
Delta_bond
Breaking a molecular bond such that both fragments retain an electron
original bond are distributed between the two fragment species. Bond cleavage is also possible by a process called heterolysis. The energy involved in
Homolysis_(chemistry)
Reluctance of s-orbitals to take part in bond formation
bond energy with the increase in size from Al to Tl so that the energy required to involve the s electron in bonding is not compensated by the energy
Inert-pair_effect
Electron in the outer shell of an atom's energy levels
covalent bond. Similar to a core electron, a valence electron has the ability to absorb or release energy in the form of a photon. An energy gain can
Valence_electron
Chemical compound
Xe–F bonds are weak. XeF2 has a total bond energy of 267.8 kJ/mol (64.0 kcal/mol), with first and second bond energies of 184.1 kJ/mol (44.0 kcal/mol) and
Xenon_difluoride
2002 James Bond film by Lee Tamahori
which is able to focus solar energy on a small area and provide year-round sunshine for agriculture. Frost seduces Bond, and Jinx infiltrates Graves's
Die_Another_Day
Function describing the energy of a physical system in terms of certain parameters
degrees of freedom (e.g. two bond lengths), the value of the energy (analogy: the height of the land) is a function of two bond lengths (analogy: the coordinates
Potential_energy_surface
Various molecular structures formed only by rotation about single bonds
rotation about one single bond. Rotating their carbon–carbon bonds, the molecules ethane and propane have three local energy minima. They are structurally
Rotamer
ignited by an energy pulse, i.e. temperature, mechanical pressure, electrical spark or laser pulse. The generated heat is localized to the bonding interface
Reactive_bonding
Australian businessman
Peter Bond is an Australian mining and energy executive, best known as the former Executive Chairman of Linc Energy and creator of the world's first synthetic
Peter_Bond
Molecular orbital which weakens chemical bonding
type of molecular orbital that weakens the chemical bond between two atoms and helps to raise the energy of the molecule relative to the separated atoms.
Antibonding_molecular_orbital
Model in organometallic chemistry
backbonding has been found computationally to contribute less than 20% of the bond energy for d10 group 10 and 11 alkene complexes, and is energetically negligible
Dewar–Chatt–Duncanson_model
Assumption that a chemical property will only vary slightly under different circumstances
spectroscopy Characteristic frequencies in Infrared spectroscopy Bond length and bond angle Bond energy Transferable properties are distinguished from conserved
Transferability_(chemistry)
Molecule containing main group elements with more than eight valence electrons
(30 kJ) mol−1, a minor but significant fraction of the total energy of the total bond energy (64 kcal (270 kJ) mol−1). Other studies have similarly found
Hypervalent_molecule
1985 James Bond film by John Glen
the James Bond series produced by Eon Productions, and the seventh and final appearance of Roger Moore as the fictional MI6 agent James Bond. Although
A_View_to_a_Kill
Description of a molecule's true bond structure as a combination of structures
more double bond character and hence has a shorter bond length than cyclohexane. Resonance (or delocalization) energy is the amount of energy needed to
Resonance_(chemistry)
2012 James Bond film by Sam Mendes
twenty-third in the James Bond series produced by Eon Productions. The film is the third to star Daniel Craig as fictional MI6 agent James Bond and features Javier
Skyfall
Type of chemical bond in metals
proved to be in describing metallic bonding, it remains a one-electron approximation of a many-body problem: the energy states of an individual electron
Metallic_bonding
Chemical element with atomic number 8 (O)
as the individual atoms of oxygen tend to quickly bond with nearby molecules. Its lowest-energy electronic state is a spin triplet, designated by the
Allotropes_of_oxygen
Bonds used to fund projects which benefit the environment
A green bond is a fixed-income financial instrument (bond) which is used to fund projects that have positive environmental benefits. When referring to
Green_bond
Covalent bond between two carbon atoms
A carbon–carbon bond is a covalent bond between two carbon atoms. The most common form is the single bond: a bond composed of two electrons, one from
Carbon–carbon_bond
Elastomer composed of silicone
polymer. The difference is partly due to the higher bond energy, the energy required to break the Si-O bond, and also because polyoxymethylene decomposes formaldehyde
Silicone_rubber
The reactive empirical bond-order (REBO) model is a function for calculating the potential energy of covalent bonds and the interatomic force. In this
Reactive_empirical_bond_order
Process breaking down complex organic molecules into simpler ones
principle, ethane can undergo homolysis: CH3CH3 → 2 CH3⋅ Because C−C bond energy is so high (377 kJ/mol), this reaction is not observed under laboratory
Cracking_(chemistry)
Chemical compound
matrix isolation). The average Zn–H bond energy was recently calculated to be 51.24 kcal mol−1, while the H–H bond energy is 103.3 kcal mol−1.[citation needed]
Zinc_hydride
Energy to convert a liquid substance to a gas at a given pressure
the enthalpy of atomization must be used to obtain a true value of the bond energy. An alternative description is to view the enthalpy of condensation as
Enthalpy_of_vaporization
Biological process to convert light into chemical energy
chloroplasts. II. Photophosphorylation, the conversion of light into phosphate bond energy". Journal of the American Chemical Society. 76 (24): 6324–6329. doi:10
Photosynthesis
gold) and the bonding pads. As heat softens the wire, pressure is applied to form the bond. Ultrasonic Wedge Bonding (UWB): Ultrasonic energy is used in
Wedge_bonding
Unit of energy
kinetic energy gained by a single electron accelerating through an electric potential difference of one volt in a vacuum. When used as a unit of energy, the
Electronvolt
Theory of molecular orbitals by Erich Hückel
example, using the π bond energy of ethylene (65 kcal/mole) and comparing the energy of a doubly-occupied π orbital (2α + 2β) with the energy of electrons in
Hückel_method
Oxide of silicon
148.3 pm, which compares with the length of 161 pm in α-quartz. The bond energy is estimated at 621.7 kJ/mol. SiO2 is most commonly encountered in nature
Silicon_dioxide
Overview of and topical guide to energy
energy, a concept explaining how the constituents of atoms or molecules are bound together Bond energy, a measure of the strength of a chemical bond Nuclear
Outline_of_energy
Molecular orbital theory applied to transition metal complexes
and three (n+1)p orbitals. These orbitals have the appropriate energy to form bonding interactions with ligands. The LFT analysis is highly dependent
Ligand_field_theory
Dissociation of molecular ions
cleavage or homolysis or heterolytic cleavage or heterolysis of the bond. Relative bond energy and the ability to undergo favorable cyclic transition states
Fragmentation (mass spectrometry)
Fragmentation_(mass_spectrometry)
Study of chemical compounds containing fluorine-carbon bonds
other organohalogens. The carbon–fluorine bond is one of the strongest in organic chemistry (an average bond energy around 480 kJ/mol). This is significantly
Organofluorine_chemistry
Chemical compound
triple bond, phosphorus prefers a tetrahedral form P4 because P-P pi-bonds are high in energy. Diphosphorus is, therefore, very reactive with a bond-dissociation
Diphosphorus
Heat treatment technique used to increase the yield strength of malleable materials
such that bond energy before and after shearing is different. For example, in an ordered cubic crystal with composition AB, the bond energy of A-A and
Precipitation_hardening
Energy-carrying molecule in living cells
Lipmann, F. (1941). "Metabolic generation and utilization of phosphate bond energy". Adv. Enzymol. 1: 99–162. ISSN 0196-7398. "History: ATP first discovered
Adenosine_triphosphate
Chemical compound
Rather than the double bond of O2, the bond order is considered to be 2+1/2. Relative to most molecules, this ionization energy is very high at 1175 kJ/mol
Dioxygenyl
Bonding of atoms of the same element into chains or rings
halogens. The ability of an element to catenate is primarily based on the bond energy of the element to itself, which decreases with more diffuse orbitals
Catenation
Drug delivery method
bonds have an estimated bond energy of 172 kJ/mol, and disulfide bonds have estimated bond energy of 268 kJ/mol; the lower bond energy holds a higher potential
Reduction-sensitive nanoparticles
Reduction-sensitive_nanoparticles
Chemical element with atomic number 16 (S)
preventing others from forming. As the bond energy of a covalent disulfide bridge is higher than the energy of a coordinate bond or hydrophobic interaction, greater
Sulfur
Chemical compound
potassium. Silicon heated in a stream of iodine gas, could not be made to bond with it.) White, George Clifford (1986). The handbook of chlorination (2nd ed
Silicon_tetrachloride
Characters in the films and novels
The following is a list of primary antagonists in the James Bond novels and film series. Comic strip serials released by the Daily Express between 1958
List_of_James_Bond_villains
Energy collected from renewable resources
Renewable energy (also called green energy) is energy made from renewable natural resources that are replenished on a human timescale. The most widely
Renewable_energy
Chemical element with atomic number 8 (O)
filling of which results in a bond order of two. More specifically, the double bond is the result of sequential, low-to-high energy, or Aufbau, filling of orbitals
Oxygen
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