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|Section2= |Section3= |Section7= |Section8= }} Aluminium bromide is any chemical compound with the empirical formula AlBrx. The species called "aluminium tribromide," is the most common aluminium bromide. The species aluminium monobromide forms from the reaction of HBr with Al metal at high temperature. It disproportionates near room temperature: :6/n "()n" → Al2Br6 + 4 Al This reaction is reversed at temperatures higher than 1000 °C. ==Structure== "Aluminium tribromide" is really dialuminium hexabromide with the molecular formula of Al2Br6 in the solid state, solutions in noncoordinating solvents (e.g. CS2), and in the melt. Even upon evaporation, Al2Br6 exists in the gas phase. At high temperatures, the gaseous molecules break up into monomers: : Al2Br6 → 2 AlBr3 ΔH°diss = 59 kJ/mol Aluminium monobromide has been crystallographically characterized in the form the tetrameric adduct Al4Br4(NEt3)4 (Et = C2H5). This species is electronically related to cyclobutane. Theory suggest that the diatomic aluminium monobromide condenses to a dimer and then a tetrahedral cluster Al4Br4, akin to the analogous boron compound. Al2Br6 consists of two AlBr4 tetrahedra that share a common edge. The molecular symmetry is D2h. The monomer AlBr3, observed only in the vapor, can be described as trigonal planar, D3h point group. The atomic hybridization of aluminium is often described as ''sp2''. The Br-Al-Br bond angles are 120 °. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Aluminium bromide」の詳細全文を読む スポンサード リンク
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