Bis Pinacolato Diborane

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Pinacolato

CAS Number:73183‑34‑3

Synonyms:Bis(pinacolato)diborane; B₂pin₂; Octamethyl-2,2′-bi-1,3,2-dioxaborolane

Chemical Formula:C₁₂H₂₄B₂O₄

Product Introduction

Bis(pinacolato) diborane is a colorless crystalline powder used widely in organic synthesis. It offers air- and moisture-stable diborane functionality, enabling direct formation of aryl, vinyl, and alkyl boronate esters. It's a staple reagent in Suzuki–Miyaura coupling and C–H borylation reactions.

Physical & Chemical Properties

Property Value
Appearance Colorless crystalline solid
Purity ≥ 98 %
Melting Point 137–140 °C
Molecular Weight 253.94 g/mol
Density ~1.0 g/cm³
Solubility Soluble in THF, DCM, toluene, hexane, heptane

Applications

  • Suzuki coupling: Forms boronate esters for palladium-catalyzed cross-coupling reactions.
  • C–H borylation: Enables direct installation of boron moieties on arenes and alkanes under mild conditions.
  • Reagent versatility: Used in platinum- or iridium-catalyzed diborylation, alkene/alkyne functionalization, and oxidative transformations.
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