638102

4,4′-Bis(triethoxysilyl)-1,1′-biphenyl

≥90% (VPCC)

• Synonym(s): 4,4′-Bis(triethoxysilyl)biphenyl
• Linear Formula: [-C₆H₄Si(OC₂H₅)₃]₂
• CAS Number: 123640-93-7
• Molecular Weight: 478.73
• MDL number: MFCD06798075
• UNSPSC Code: 12352103
• PubChem Substance ID: 24882911
• NACRES: NA.22

Properties

• Quality Level: 100
• assay: ≥90% (VPCC)
• bp: 203-206 °C/0.3 mmHg (lit.)
• density: 1.047 g/mL at 25 °C (lit.)
• SMILES string: CCO[Si](OCC)(OCC)c1ccc(cc1)-c2ccc(cc2)[Si](OCC)(OCC)OCC
• InChI: 1S/C24H38O6Si2/c1-7-25-31(26-8-2,27-9-3)23-17-13-21(14-18-23)22-15-19-24(20-16-22)32(28-10-4,29-11-5)30-12-6/h13-20H,7-12H2,1-6H3
• InChI key: KENDGHJJHKCUNB-UHFFFAOYSA-N

Description

Application

4,4′-Bis(triethoxysilyl)-1,1′-biphenyl (BTESB) can be used as an indicator to determine the chirality of helical silica nanotubes.

BTESB can also be utilized as a precursor to prepare:

• Helical 4, 4′-biphenylene-silica nanotubes and nanoribbons using 3-aminopropyltrimethoxysilane as a co-structure-directing agent.
• Biphenyl-bridged alkoxysilane-based crosslinked polyalkoxysilane by condensation with linear aliphatic diols.
• Biphenylene-bridged silsesquioxane thin films by the sol-gel method.

A silicon-based nucleophile shown to be reactive in Pd-catalyzed cross-coupling reactions.

Safety Information

• hcodes: H413
• Hazard Classifications: Aquatic Chronic 4
• Storage Class: 10 - Combustible liquids
• wgk_germany: WGK 3
• flash_point_f: >230.0 °F - closed cup
• flash_point_c: > 110 °C - closed cup
• ppe: Eyeshields, Gloves, multi-purpose combination respirator cartridge (US)