| coordinate covalent bond | A bond in which the two electrons shared by a pair of atoms belonged originally to only one of the atoms; often represented by a small arrow pointing toward the electron receiver; e.g., nitric acid, O(OH)N→O; phosphoric acid, (OH)3P→O. Synonym: coordinate covalent bond. (05 Mar 2000) |
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| covalent | Denoting an interatomic bond characterised by the sharing of 2, 4, or 6 electrons. (05 Mar 2000) |
| covalent bond | A bond between two or more atoms that is provided by electrons that travel between the atoms' nuclei, holding them together but keeping them a stable distance apart. (09 Oct 1997) |
| general acid-base catalysis | A catalytic reaction that involves the tranfer of a proton to or from anon-water molecule. (09 Oct 1997) |
| catalysis | <chemistry> The acceleration of a chemical reaction by a catalyst. (16 Mar 1998) |
| heterogeneous catalysis | <chemistry> A form of catalysis in which the catalyst is in different physical state than the reactants. (09 Jan 1998) |
| homogeneous catalysis | <chemistry> A form of catalysis in which the catalyst is in the same physical state than the reactants, for example reactants and catalyst are all gases. (09 Jan 1998) |