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Lewis structures – also called Lewis dot formulas, Lewis dot structures, electron dot structures, or Lewis electron dot structures ( LEDs ) – are diagrams that show the bonding between atoms of a molecule, as well as the lone pairs of electrons that may exist in the molecule. [ 1][ 2][ 3] A Lewis structure can be drawn for any covalently ...
Acids and bases. A Lewis acid (named for the American physical chemist Gilbert N. Lewis) is a chemical species that contains an empty orbital which is capable of accepting an electron pair from a Lewis base to form a Lewis adduct. A Lewis base, then, is any species that has a filled orbital containing an electron pair which is not involved in ...
Gallium (III) bromide is, at room temperature and atmospheric pressure, a white, crystalline powder which reacts favorably and exothermically with water. [1] Solid gallium tribromide is stable at room temperature and can be found primarily in its dimeric form. [2] GaBr 3 can form an intermediate halide, Ga 2 Br 7; however, this is not as common ...
G. N. Lewis and the Chemical Bond. Pauling, Linus. Journal of Chemical Education, v61 n3 p201-03 Mar 1984. Discusses the contributions of G. N. Lewis to chemistry, focusing on his formulation of the basic principle of the chemical bond--the idea that the chemical bond consists of a pair of electrons held jointly by two atoms. (JN)
Journal of Chemical Education, v81 n5 p722 May 2004 An experiment to prepare a deuterium labeled adduct of a Lewis acid and Lewis base, to use computational methods allowing students to visualize the LUMO of Lewis acids, the HOMO of Lewis bases and the molecular orbitals of the adduct that is formed is developed.
With some ligands, L, e.g. dioxane, a neutral complex, Ga 2 X 2 L 2, with a gallium-gallium bond is produced. These compounds have been used as a route into gallium chain and cluster compounds. [2] Ga 2 Br 3 and Ga 2 I 3 These are formulated Ga I 2 Ga II 2 Br 6 and Ga I 2 Ga II 2 I 6 respectively. Both anions contain a gallium-gallium bond ...
Compounds containing Ga–Ga bonds are true gallium(II) compounds, such as GaS (which can be formulated as Ga 2 4+ (S 2−) 2) and the dioxan complex Ga 2 Cl 4 (C 4 H 8 O 2) 2. There are also compounds of gallium with negative oxidation states, ranging from -5 to -1, most of these compounds being magnesium gallides (Mg x Ga y ).
Gallium (II) sulfide, GaS, is a chemical compound of gallium and sulfur. The normal form of gallium (II) sulfide as made from the elements has a hexagonal layer structure containing Ga 24+ units which have a Ga-Ga distance of 248pm. [1] This layer structure is similar to GaTe, GaSe and InSe. [1] An unusual metastable form, with a distorted ...
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