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Phosphorus tribromide, like PCl 3 and PF 3, has both properties of a Lewis base and a Lewis acid. For example, with a Lewis acid such as boron tribromide it forms stable 1 :1 adducts such as Br 3 B · PBr 3. At the same time PBr 3 can react as an electrophile or Lewis acid in many of its reactions, for example with amines.
In chemistry, the pentazenium cation (also known as pentanitrogen) is a positively-charged polyatomic ion with the chemical formula N + 5 and structure N−N−N−N−N.Together with solid nitrogen polymers and the azide anion, it is one of only three poly-nitrogen species obtained in bulk quantities.
Expressing resonance when drawing Lewis structures may be done either by drawing each of the possible resonance forms and placing double-headed arrows between them or by using dashed lines to represent the partial bonds (although the latter is a good representation of the resonance hybrid which is not, formally speaking, a Lewis structure).
Caesium tribromide is an inorganic compound with the chemical formula CsBr 3. It can be obtained by crystallization from a concentrated aqueous solution of caesium bromide containing large amounts of bromine , [ 3 ] or by the hydrothermal reaction of caesium bromide, caesium bromate , and hydrobromic acid , in which bromine is generated in situ.
2 Structure and properties. 3 Thermodynamic properties. 4 Spectral ... This page provides supplementary chemical data on phosphorus tribromide. Material Safety Data Sheet
Antimony tribromide has two crystalline forms, both having orthorhombic symmetries. When a warm carbon disulfide solution of SbBr 3 is rapidly cooled, it crystallizes into the needle-like α-SbBr 3, which then slowly converts to the more stable β form. [2] Antimony tribromide hydrolyzes in water to form hydrobromic acid and antimony trioxide:
Heating the tribromide gives titanium(II) bromide together with the volatile tetrabromide: [3] 2 TiBr 3 → TiBr 4 + TiBr 2. The solid dissolves in donor solvents (L) such as pyridine and nitriles to produce 3:1 adducts: TiBr 3 + 3 L → TiBr 3 L 3
Bromoform was discovered in 1832 by Löwig who distilled a mixture of bromal and potassium hydroxide, as analogous to preparation of chloroform from chloral. [5]Bromoform can be prepared by the haloform reaction using acetone and sodium hypobromite, by the electrolysis of potassium bromide in ethanol, or by treating chloroform with aluminium bromide.