The name for B2Cl6 is diboron hexachloride.
B2Cl6 is the formula of diboron hexachloride.'Di' = 2 and 'Hexa' = 6However:I could only find BCl3 (boron trichloride) or B2H6 (diborane) in my chemical text books, and one reaction with both of the last examples:4 BCl3 + 3 LiAlH4 → 2 B2H6 + 3 LiAlCl4but no confirmation of B2Cl6 molecules. So I doubt if it exists.
??? 'diborom' ??? Are we talking of 'BoroN or BroMine? If you mean diboron hexachloride then the formula is B2Cl6 di - two(Latin) hexa - six(Latin).