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Sigma-Aldrich

Barium tert-butoxide

85%

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Synonym(s):
Barium di-t-butoxide
Empirical Formula (Hill Notation):
C8H18BaO2
CAS Number:
Molecular Weight:
283.55
MDL number:
PubChem Substance ID:
NACRES:
NA.22

Quality Level

Assay

85%

form

powder

mp

>200 °C

storage temp.

2-8°C

SMILES string

CC(C)(C)O[Ba]OC(C)(C)C

InChI

1S/2C4H9O.Ba/c2*1-4(2,3)5;/h2*1-3H3;/q2*-1;+2

InChI key

SLPLCLDJTNLWPW-UHFFFAOYSA-N

Related Categories

General description

Barium tert-butoxide is a Brønsted base catalyst that can be used as a precursor of various barium catalysts like barium aryloxide. It can also be used in the preparation of barium diphenylmethanide, applicable in the organometallic chemistry.

Application

Barium tert-butoxide can be used:
  • As a catalyst along with various phenolic ligands in the aldol reactions of amides with aldehydes and ketones.
  • To prepare yttrium and copper metal complexes by reacting with Y(thd)3 and Cu(thd)2, where “thd” is 2,2,6,6-tetramethylheptane-3,5-dione.
  • As an initiator along with an alkyl lithium in the butadiene copolymerization reaction.
  • In the iridium catalyzed allylic alkylation of non-stabilized enolates.

Signal Word

Danger

Hazard Statements

Hazard Classifications

Flam. Sol. 2 - Skin Corr. 1B - STOT SE 3

Target Organs

Respiratory system

Supplementary Hazards

Storage Class Code

4.2 - Pyrophoric and self-heating hazardous materials

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Regulatory Information

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Barium tert-butoxide
Encyclopedia of Reagents for Organic Synthesis, Second Edition (2009)
Accessible microstructures of polybutadiene by anionic polymerization
Forens A, et al.
Polymer, 153(4), 103-122 (2018)
Iridium-catalyzed diastereo-, enantio-, and regioselective allylic alkylation with prochiral enolates
Hethcox JC, et al.
ACS Catalysis, 6(9), 6207-6213 (2016)
Highly anti-Selective Catalytic Aldol Reactions of Amides with Aldehydes
Saito S and Kobayashi S
Journal of the American Chemical Society, 128(27), 8704-8705 (2006)
Reactivity of mixed-metal BaCu and BaY β-diketonatoalkoxides with lewis bases: Molecular structures of [Ba2Cu (μ3, η2-OCHMeCH2NMe2) 2 (μ, η2-thd) 2 (η2-thd) 2 (PriOH2],[Cu3 (μ3-OBut) 2 (μ-OBut)(η2-thd) 3] and [Ba (η2-thd) 2 (TMEDA) 2]
Labrize F, et al.
Polyhedron, 15(4), 577-589 (1996)

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