9th
( Be) share diagonal relationship with (Al) as
(i)Like aluminum, beryllium is not readily attacked by acids because of the presence of an oxide film on the surface of the metal.
(ii)Beryllium hydroxide dissolves in excess of alkali to give a beryllate ion, just as aluminium hydroxide gives aluminate ion.
(iii)The chlorides of both beryllium and aluminium have Cl- bridged chloride structure in vapour phase. Both the chlorides are soluble in organic solvents and are strong Lewis acids. They are used as Friedel Craft catalysts.
(iv)Beryllium and aluminium ions have strong tendency to form complexes.
(i)Like aluminum, beryllium is not readily attacked by acids because of the presence of an oxide film on the surface of the metal.
(ii)Beryllium hydroxide dissolves in excess of alkali to give a beryllate ion, just as aluminium hydroxide gives aluminate ion.
(iii)The chlorides of both beryllium and aluminium have Cl- bridged chloride structure in vapour phase. Both the chlorides are soluble in organic solvents and are strong Lewis acids. They are used as Friedel Craft catalysts.
(iv)Beryllium and aluminium ions have strong tendency to form complexes.