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659878

Sigma-Aldrich

Potassio ter-butossido

sublimed grade, 99.99% trace metals basis

Sinonimo/i:

Potassio ter-butilato, Potassio t-butossido

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About This Item

Formula condensata:
(CH3)3COK
Numero CAS:
865-47-4
Peso molecolare:
112.21
Beilstein:
3556712
Numero CE:
212-740-3
Numero MDL:
MFCD00012162
Codice UNSPSC:
12352103
ID PubChem:
24884165
NACRES:
NA.23

Grado

sublimed grade

Tensione di vapore

1 mmHg ( 220 °C)

Saggio

99.99% trace metals basis

Forma fisica

solid

Impiego in reazioni chimiche

core: potassium

Punto di fusione

256-258 °C (dec.) (lit.)

Stringa SMILE

[K+].CC(C)(C)[O-]

InChI

1S/C4H9O.K/c1-4(2,3)5;/h1-3H3;/q-1;+1
LPNYRYFBWFDTMA-UHFFFAOYSA-N

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Descrizione generale

Potassium tert-butoxide is a strong alkoxide base, it can deprotonate carbon and other Brφnsted acids. It is a relatively poor nucleophile.
Total impurities: may contain up to 5,000 ppm Sodium

Applicazioni

Mizoroki-Heck-Type reactions are mediated by potassium tert-butoxide. potassium tert-butoxide can commence the anionic polymerization of carbazolyl-substituted oxiranes.

Pittogrammi

FlameCorrosion
GHS02,GHS05

Avvertenze

Danger

Indicazioni di pericolo

H228,H252,H314

Classi di pericolo

Eye Dam. 1 - Flam. Sol. 1 - Self-heat. 2 - Skin Corr. 1A

Rischi supp

EUH014

Codice della classe di stoccaggio

4.2 - Pyrophoric and self-heating hazardous materials

Classe di pericolosità dell'acqua (WGK)

WGK 1

Punto d’infiammabilità (°F)

Not applicable

Punto d’infiammabilità (°C)

Not applicable

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Certificati d'analisi (COA)

Lot/Batch Number
MKCC6665
MKCC0435
MKCC2225
MKCB6443
MKCB1969V

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Anionic polymerization of carbazolyl-substituted oxiranes initiated by potassium alkalide, potassium tert-butoxide and potassium hydride.
Buika G, et al.
Macromolecular Chemistry and Physics, 196(4), 1287-1293 (1995)
Einav Amit et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 26(57), 13046-13052 (2020-04-29)
N-heterocyclic carbenes (NHCs) have emerged as a unique molecular platform for the formation of self-assembled monolayers (SAMs) on various surfaces. However, active carbene formation requires deprotonation of imidazolium salt precursors, which is mostly facilitated by exposure of the salt to
Hajime Ito et al.
Chemical communications (Cambridge, England), 48(64), 8006-8008 (2012-07-10)
The regio- and diastereoselective silaboration of aromatic alkenes with a silylboron compound proceeds in the presence of a catalytic amount of potassium tert-butoxide, providing a complementary method to the corresponding transition metal-catalyzed reactions.
Aurélie Mallinger et al.
The Journal of organic chemistry, 74(3), 1124-1129 (2008-12-24)
3-Aryltetronic acids were prepared in one step by treatment of a mixture of methyl arylacetates and methyl hydroxyacetates with potassium tert-butoxide, via tandem transesterification/Dieckmann condensation. Several mushroom or lichen pigments, vulpinic acids, were synthesized from 3-(4-methoxyphenyl)tetronic acid in three steps
Scott E Denmark et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 12(19), 4954-4963 (2006-05-04)
This paper chronicles the conceptual development, proof of principle experiments, and recent advances in the palladium-catalyzed cross-coupling reactions of the conjugate bases of organosilanols. The discovery that led to the design and refinement of this process represents a classical illustration
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