anions

См. также в других словарях:

• Anions — Anion Un anion (du grec ana  : « en haut » et iôn : « qui va ») est un ion qui, ayant gagné un ou plusieurs électron(s), porte une ou plusieurs charge(s) électrique(s) négative(s) : à l’inverse d’un cation il… …   Wikipédia en Français

• anions — Ion I on ([imac] [o^]n), n. [Gr. io n, neut, of iw n, p. pr. of ie nai to go.] 1. (Elec. Chem.) an atom or goup of atoms (radical) carrying an electrical charge. It is contrasted with neutral atoms or molecules, and free radicals. Certain… …   The Collaborative International Dictionary of English

• anions — n. negatively charged ion (Electricity) …   English contemporary dictionary

• Common simple cations and anions — ▪ Table Common simple cations and anions cation name anion name H b; hydrogen H− hydride Li b; lithium F− fluoride Na b; sodium Cl− chloride K b; potassium Br− bromide Cs b; cesium I− iodide Be2 b; beryllium O2− oxide Mg2 b; magnesium S2− sulfide …   Universalium

• Non-coordinating anion — Anions that interact weakly with cations are termed non coordinating anions, although a more accurate term is weakly coordinating anion .[1] Non coordinating anions are useful in studying the reactivity of electrophilic cations. They are commonly …   Wikipedia

• Oxocarbon anion — 2D diagram of mellitate C12O6− 12, one of the oxocarbon anions. Black circles are carbon atoms, red circles are oxygen atoms. Each blue halo represents one half of a negative charge. In chemistry, an oxocarbon anion is a …   Wikipedia

• SUPRAMOLÉCULAIRE (CHIMIE) — Au delà de la chimie moléculaire, fondée sur la liaison covalente, s’étend la chimie supramoléculaire, fondée sur les interactions moléculaires – les associations de deux ou plusieurs espèces chimiques et la liaison intermoléculaire. Les… …   Encyclopédie Universelle

• chemical bonding — ▪ chemistry Introduction       any of the interactions that account for the association of atoms into molecules, ions, crystals, and other stable species that make up the familiar substances of the everyday world. When atoms approach one another …   Universalium

• Nitrile anion — Nitrile anions are nitriles lacking a proton at the position α to the nitrile group. They undergo nucleophilic addition and substitution reactions with various electrophiles.[1] Although nitrile anions are functionally similar to enolates, the… …   Wikipedia

• IONS (ÉCHANGEURS D’) — Un échangeur d’ions est un solide comportant des groupements fonctionnels ionisés, fixes, porteurs de charges positives ou négatives et des ions mobiles de signe contraire échangeables avec d’autres provenant d’une solution. Pour accélérer ces… …   Encyclopédie Universelle

• coordination compound — Chem. complex (def. 10). Also called coordination complex. * * * ▪ chemistry Introduction  any of a class of substances with chemical structures in which a central metal atom is surrounded by nonmetal atoms or groups of atoms, called ligands… …   Universalium