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[1] [2] [3] Introduced by Gilbert N. Lewis in his 1916 article The Atom and the Molecule, a Lewis structure can be drawn for any covalently bonded molecule, as well as coordination compounds. [4] Lewis structures extend the concept of the electron dot diagram by adding lines between atoms to represent shared pairs in a chemical bond.
The Br–Br distance is 227 pm (close to the gaseous Br–Br distance of 228 pm) and the Br···Br distance between molecules is 331 pm within a layer and 399 pm between layers (compare the van der Waals radius of bromine, 195 pm). This structure means that bromine is a very poor conductor of electricity, with a conductivity of around 5 × 10 ...
Bond energies to bromine tend to be lower than those to chlorine but higher than those to iodine, and bromine is a weaker oxidising agent than chlorine but a stronger one than iodine. This can be seen from the standard electrode potentials of the X 2 /X − couples (F, +2.866 V; Cl, +1.395 V; Br, +1.087 V; I, +0.615 V; At, approximately +0.3 V).
Barium bromide is a precursor to chemicals used in photography and to other bromides. Historically, barium bromide was used to purify radium in a process of fractional crystallization devised by Marie Curie.
FeBr 3 forms a polymeric structure featuring six-coordinate, octahedral Fe centers. [2] Although inexpensively available commercially, FeBr 3 can be prepared by treatment of iron metal with bromine: 2 Fe + 3 Br 2 → 2 FeBr 3. Above 200 °C, FeBr 3 decomposes to ferrous bromide: 2FeBr 3 → 2FeBr 2 + Br 2
The first synthesis was done by Poggiale in 1846 by reacting boron trioxide with carbon and bromine at high temperatures: [7] B 2 O 3 + 3 C + 3 Br 2 → 2 BBr 3 + 3 CO. An improvement of this method was developed by F. Wöhler and Deville in 1857. By starting from amorphous boron the reaction temperatures are lower and no carbon monoxide is ...
It can be prepared by reacting beryllium metal with elemental bromine at temperatures of 500 °C to 700 °C: [1] Be + Br 2 → BeBr 2. When the oxidation is conducted on an ether suspension, one obtains colorless dietherate: [4] Be + Br 2 + 2 O(C 2 H 5) 2 → BeBr 2 (O(C 2 H 5) 2) 2
Bromine monochloride, also called bromine(I) chloride, bromochloride, and bromine chloride, is an interhalogen inorganic compound with chemical formula BrCl. It is a very reactive golden yellow gas with boiling point 5 °C and melting point −66 °C. Its CAS number is 13863-41-7, and its EINECS number is 237-601-4. [1]