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Sigma-Aldrich

Potassium bis(trimethylsilyl)amide

95%

Sinônimo(s):

Hexamethyldisilazane potassium salt, Potassium hexamethyldisilazide

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5 G
R$ 592,00
25 G
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100 G
R$ 3.061,00

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5 G
R$ 592,00
25 G
R$ 1.231,00
100 G
R$ 3.061,00

About This Item

Fórmula linear:
[(CH3)3Si]2NK
Número CAS:
Peso molecular:
199.48
Beilstein:
4006754
Número MDL:
Código UNSPSC:
12352111
ID de substância PubChem:
NACRES:
NA.22

R$ 592,00


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Nível de qualidade

Ensaio

95%

Formulário

solid

densidade

0.877  g/cm3 at 20 °C

cadeia de caracteres SMILES

C[Si](C)(C)N([K])[Si](C)(C)C

InChI

1S/C6H18NSi2.K/c1-8(2,3)7-9(4,5)6;/h1-6H3;/q-1;+1

chave InChI

IUBQJLUDMLPAGT-UHFFFAOYSA-N

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Descrição geral

Potassium bis(trimethylsilyl)amide is commonly abbreviated as KHMDS with molecular formula [(CH3)3Si]2NK. It is widely used as Bronsted base in synthesis.[1][1]

[1]KHMDS is a base catalyst, that shows high activity and selectivity for the alkylation of alkylpyridines.[2]

Aplicação

Anionic initiator used in the preparation of poly(ethylene oxide).[3] Sterically hindered base employed in selective cyclization reactions.[4] Also used in the preparation of lanthanide complexes.[5][6]

Características e benefícios

Potassium bis(trimethylsilyl)amide (KHMDS):
  • Easily available.
  • Good selectivity for the benzylic C−H bonds.
  • Good reactivity for sterically crowded C−H bonds.

Pictogramas

Corrosion

Palavra indicadora

Danger

Frases de perigo

Classificações de perigo

Eye Dam. 1 - Skin Corr. 1B

Perigos de suplementos

Código de classe de armazenamento

8A - Combustible corrosive hazardous materials

Classe de risco de água (WGK)

WGK 3

Ponto de fulgor (°F)

Not applicable

Ponto de fulgor (°C)

Not applicable

Equipamento de proteção individual

Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges


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Synthesis of poly(ethylene oxide) with heterobifunctional reactive groups at its terminals by an anionic initiator.
M Yokoyama et al.
Bioconjugate chemistry, 3(4), 275-276 (1992-07-01)
Aeilke J Kamphuis et al.
ChemSusChem, 12(15), 3635-3641 (2019-05-01)
The development of new families of active and selective single-component catalysts based on earth-abundant metal is of interest from a sustainable chemistry perspective. In this context, anionic mono(formazanate) iron(II) complexes bearing labile halide ligands, which possess both Lewis acidic and
The Journal of Organic Chemistry, 58, 6177-6177 (1993)
Ana I Ojeda-Amador et al.
Dalton transactions (Cambridge, England : 2003), 46(19), 6392-6403 (2017-05-04)
The structural chemistry of eleven donor complexes of the important Brønsted base potassium 1,1,1,3,3,3-hexamethyldisilazide (KHMDS) has been studied. Depending on the donor, each complex adopted one of five general structural motifs. Specifically, in this study the donors employed were toluene
Organometallics, 11, 2003-2003 (1992)

Questions

1–2 of 2 Questions  
  1. How can I determine the shelf life / expiration / retest date of this product?

    1 answer
    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

      Helpful?

  2. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer
    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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