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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:
Its trihalides, antimony trifluoride, antimony trichloride, antimony tribromide, and antimony triiodide, like all pnictogen trihalides, each have trigonal pyramidal molecular geometry. The +3 oxidation state is bismuth's most common oxidation state because its ability to form the +5 oxidation state is hindered by relativistic properties on ...
Tribromine octoxide is a binary inorganic compound of bromine and oxygen with the chemical formula Br 3 O 8. [ 1 ] [ 2 ] This is a free radical and one of the most complex bromine oxides . Synthesis
The flame retarding effect of antimony trioxide is produced by the formation of halogenated antimony compounds, [76] which react with hydrogen atoms, and probably also with oxygen atoms and OH radicals, thus inhibiting fire. [77] Markets for these flame-retardants include children's clothing, toys, aircraft, and automobile seat covers.
Tribromide is the anion with the chemical formula Br 3 −, or salts containing it: . Tetrabutylammonium tribromide; Tetrabromophosphonium tribromide; Pyridinium perbromide; Sodium and potassium tribromides can be prepared by reacting NaBr or KBr with aqueous bromine.
It is far less reactive than the other nitrogen trihalides nitrogen trichloride, nitrogen tribromide, and nitrogen triiodide, all of which are explosive. Alone among the nitrogen trihalides it has a negative enthalpy of formation. It is prepared in modern times both by direct reaction of ammonia and fluorine and by a variation of Ruff's method. [6]
Antimony is capable of displacing hydrogen from water, when heated: 2 Sb + 3 H 2 O → Sb 2 O 3 + 3 H 2. [362] It melts at 631 °C. Antimony is a semimetal with an electrical conductivity of around 3.1 × 10 4 S•cm −1 [363] and a band overlap of 0.16 eV.
Nitrogen tribromide reacts instantly with ammonia in dichloromethane solution at −87 °C to yield NBrH 2. [7] NBr 3 + 2 NH 3 → 3 NH 2 Br. It also reacts with iodine in dichloromethane solution at −87 °C to produce NBr 2 I, which is a red-brown solid that stable up to -20 °C. [7] NBr 3 + I 2 → NBr 2 I + IBr