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73183-34-3

Basic Information
CAS No.: 73183-34-3
Name: Bis(pinacolato)diboron
Molecular Structure:
Molecular Structure of 73183-34-3 (Bis(pinacolato)diboron)
Formula: C12H24B2O4
Molecular Weight: 253.94
Synonyms: Bis(pinacolato)diborane;4,4,4′,4′,5,5,5′,5′-octamethyl-2,2′-bi-1,3,2-dioxaborolane;Pinacol diborane;
EINECS: -0
Density: 0.977 g/cm3
Melting Point: 137-140 °C(lit.)
Boiling Point: 222.595 °C at 760 mmHg
Flash Point: 88.423 °C
Solubility: Soluble in tetrahydrofuran, dichloromethane, toluene, hexane and heptane. Insoluble in water.
Appearance: white crystal powder
Hazard Symbols: HarmfulXn, IrritantXi
Risk Codes: 36/37/38-20/21/22
Safety: 26-37/39-36
Transport Information:
PSA: 36.92000
LogP: 2.24920
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Specification

1. Introduction of Bis(pinacolato)diboron
Bis(pinacolato)diboron, its Synonyms are 2,2'-bi-1,3,2-dioxaborolane, 4,4,4',4',5,5,5',5'-octamethyl-; 4,4,4',4',5,5,5',5'-Octamethyl-2,2'-bi-1,3,2-dioxaborolane; 4,4,4',4',5,5,5',5'-Octamethyl-2,2'-bi(1,3,2-dioxaborolane); Diboron pinacol ester. It is white crystal powder. The IUPAC Name of Bis(pinacolato)diboron is 4,4,5,5-Tetramethyl-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1,3,2-dioxaborolane.

2. Properties of Bis(pinacolato)diboron
Melting Point: 137-140 °C(lit.)
storage temperature: 0-6 °C
Index of Refraction: 1.432 
Molar Refractivity: 67.45 cm
Molar Volume: 259.8 cm3 
Surface Tension: 25.9 dyne/cm 
Density: 0.97 g/cm
Flash Point: 88.4 °C 
Enthalpy of Vaporization: 44.04 kJ/mol 
Boiling Point: 222.6 °C at 760 mmHg 
Vapour Pressure of Bis(pinacolato)diboron (CAS NO.73183-34-3): 0.15 mmHg at 25 °C

3. Structure Descriptors of Bis(pinacolato)diboron
SMILES: O1B(OC(C)(C)C1(C)C)B2OC(C)(C)C(O2)(C)C Copy 
InChI: InChI=1/C12H24B2O4/c1-9(2)10(3,4)16-13(15-9)14-17-11(5,6)12(7,8)18-14/h1-8H3
Product Categories: Pharmaceutical Intermediates; Boron Compounds; blocks; BoronicAcids; Miscellaneous; Small molecule; Aliphatics; Boronic Acids & Esters; DIBORON SERIES; Reagent; Organoborons; Diboron Esters; B (Classes of Boron Compounds); CHIRAL CHEMICALS; Boronic Acids & Esters

4. Safety Information of Bis(pinacolato)diboron

Hazard Codes: IrritantXi,HarmfulXn
Risk Statements: 36/37/38-20/21/22 
R36/37/38:Irritating to eyes, respiratory system and skin. 
R20/21/22:Harmful by inhalation, in contact with skin and if swallowed.
Safety Statements: 26-37/39-36 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S37/39:Wear suitable gloves and eye/face protection. 
S36:Wear suitable protective clothing.
WGK Germany: 3
Hazard Note: Irritant
HazardClass of Bis(pinacolato)diboron: IRRITANT, IRRITANT-HARMFUL, KEEP COLD

5. Use of Bis(pinacolato)diboron
Bis(pinacolato)diboron is mainly used as organic reagents, pharmaceutical intermediates, pharmaceutical intermediates.