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Bis(pinacolato)diboron
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<p>Bis(pinacolato)diboron is a <a href="/facts/Covalent_compound/EzMLf3Pz">covalent compound</a> containing two <a href="/facts/Boron/Pmwgd7Mf">boron</a> atoms and two <a href="/facts/Pinacol/PfUrsYP1">pinacolato</a> ligands. It has the formula [(CH3)4C2O2B]2; the pinacol groups are sometimes abbreviated as "pin", so the structure is sometimes represented as B2pin2. It is a colourless solid that is soluble in organic solvents. It is a commercially available reagent for making <a href="/facts/Pinacol_boronic_ester/BtN4s5B4">pinacol boronic esters</a> for <a href="/facts/Organic_synthesis/aprl6Iq7">organic synthesis</a>. Unlike some other diboron compounds, B2pin2 is not moisture-sensitive and can be handled in air. </p>