bond strengths

См. также в других словарях:

• Bond-dissociation energy — In chemistry, bond dissociation energy (BDE) or D0, is one measure of the bond strength in a chemical bond. It is defined as the standard enthalpy change when a bond is cleaved by homolysis,[1] with reactants and products of the homolysis… …   Wikipedia

• Hydrogen bond — A hydrogen bond results from a dipole dipole force between an electronegative atom and a hydrogen atom bonded to nitrogen, oxygen or fluorine (thus the name hydrogen bond , which must not be confused with a covalent bond to hydrogen). The energy… …   Wikipedia

• Carbon-oxygen bond — A carbon oxygen bond is a covalent bond between carbon and oxygen and one of the most abundant in organic chemistry and biochemistry. [ Organic Chemistry John McMurry 2nd Ed.] Oxygen has 6 valence electrons and prefers to share two electrons in… …   Wikipedia

• The James Bond Dossier — (1965), by Kingsley Amis, is a critical analysis of the James Bond novels. Amis dedicated the book to his friend, the poet and historian Robert Conquest. Later, after Ian Fleming s death, Amis became the first continuation novelist for the James… …   Wikipedia

• Hyperconjugation — In organic chemistry, hyperconjugation is the interaction of the electrons in a sigma bond (usually C–H or C–C) with an adjacent empty (or partially filled) non bonding p orbital or antibonding π orbital or filled π orbital, to give an extended… …   Wikipedia

• organometallic compound — ▪ chemical compound Introduction  any member of a class of substances containing at least one metal to carbon bond in which the carbon is part of an organic group. Organometallic compounds constitute a very large group of substances that have… …   Universalium

• organohalogen compound — Introduction  any of a class of organic compounds (organic compound) that contain at least one halogen (halogen element) ( fluorine [F], chlorine [Cl], bromine [Br], or iodine [I]) bonded to carbon. They are subdivided into alkyl, vinylic, aryl,… …   Universalium

• Hypervalent molecule — A hypervalent molecule is a molecule that contains one or more main group elements formally bearing more than eight electrons in their valence shells. Phosphorus pentachloride (PCl5), sulfur hexafluoride (SF6), the phosphate (PO43−) ion, chlorine …   Wikipedia

• Organoiodine compound — Organoiodine compounds are organic compounds that contain one or more carbon–iodine bonds. They occur widely in organic chemistry, but are relatively rare in nature. The thyroxine hormones are organoiodine compounds that are required for health… …   Wikipedia

• Heat of formation group additivity — methods in thermochemistry enable the calculation and prediction of heat of formation of organic compounds based on additivity. This method was pioneered by S. W. Benson [ Estimation of heats of formation of organic compounds by additivity… …   Wikipedia

• Veneer (dentistry) — Intervention A veneer MeSH D003801 …   Wikipedia