Bis(η5 -cyclopentadienyl)tungstendihydride reacts with iPr2BCl, BCl3 or BF3 to give the saltlike compounds [Cp2WH3]iPr2BCl2 (1a), [Cp2WH3]BCl4 (b), and [Cp2WH3]BF4 (c) with a bis(η5-cyclopentadienyl)trihydridotungsten cation and a borate anion. Compound 1a crystallizes in the space group P21/n.