Reaction of [Tc(CO)]ClO with alkali in aqueous solutions yields yellow TcH(CO) as the major product. On the other hand, [TcH(CO)] becomes the major product when the reaction with alkali is combined with the extraction into hexane. The molecular structure of TcH(CO), determined by SCXRD, is composed of the Tc(CO) fragment bound to the Tc(CO) fragment via the hydrogen bridge and weak metal-metal bond. This compound crystallizes in the monoclinic system, space group 2/, = 9.6954(2) Å, = 15.0985(3) Å, = 14.5090(3) Å, and β = 104.925(2)°. TcH(CO) was additionally characterized by IR spectroscopy. The mechanism of hydrolysis of [Tc(CO)]ClO was suggested.
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