Saltar al contenido
MilliporeSigma

324620

Sigma-Aldrich

Lithium bis(trimethylsilyl)amide

97%

Sinónimos:

Hexamethyldisilazane lithium salt

Iniciar sesiónpara Ver la Fijación de precios por contrato y de la organización

Seleccione un Tamaño

10 G
$109.00
50 G
$137.00
250 G
$446.00

$109.00


Fecha estimada de envío02 de abril de 2025


Solicitar un pedido a granel

Seleccione un Tamaño

Cambiar Vistas
10 G
$109.00
50 G
$137.00
250 G
$446.00

About This Item

Fórmula lineal:
[(CH3)3Si]2NLi
Número de CAS:
Peso molecular:
167.33
EC Number:
MDL number:
UNSPSC Code:
12352111
PubChem Substance ID:
NACRES:
NA.22

$109.00


Fecha estimada de envío02 de abril de 2025


Solicitar un pedido a granel

Quality Level

assay

97%

form

solid

pH

(12.4 at 23,7 °C)

bp

110-115 °C (at 1.33 hPa)

mp

70-71 °C

density

0.860 g/mL at 25 °C (lit.)

SMILES string

[Li]N([Si](C)(C)C)[Si](C)(C)C

InChI

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

InChI key

YNESATAKKCNGOF-UHFFFAOYSA-N

¿Está buscando productos similares? Visita Guía de comparación de productos

General description

Lithium bis(trimethylsilyl)amide is a non-nucleophilic strong Brønsted base, which is generally soluble in most of the nonpolar organic solvents. It is most commonly employed in organic reactions.[1][2]

Application

Base employed in generating enolates for the preparation of lactone precursors,[3] pyranones,[4] and cyclohexanes.[5]
Used to catalyze the addition of phosphine P-H bonds to carbodiimides leading to phosphaguanidines.[6] Also used in a novel three-step synthesis of disubstituted 1,2,5-thiadiazoles.[7]

pictograms

FlameCorrosion

signalword

Danger

Hazard Classifications

Eye Dam. 1 - Flam. Sol. 1 - Self-heat. 1 - Skin Corr. 1B

supp_hazards

Storage Class

4.2 - Pyrophoric and self-heating hazardous materials

wgk_germany

WGK 2

flash_point_f

62.6 °F - closed cup

flash_point_c

17 °C - closed cup

ppe

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


Elija entre una de las versiones más recientes:

Certificados de análisis (COA)

Lot/Batch Number

¿No ve la versión correcta?

Si necesita una versión concreta, puede buscar un certificado específico por el número de lote.

¿Ya tiene este producto?

Encuentre la documentación para los productos que ha comprado recientemente en la Biblioteca de documentos.

Visite la Librería de documentos

Wen-Xiong Zhang et al.
Chemical communications (Cambridge, England), (36), 3812-3814 (2006-09-14)
Organo alkali metal compounds such as (n)BuLi and (Me3Si)2NK act as excellent catalyst precursors for the addition of phosphine P-H bonds to carbodiimides, offering a general and atom-economical route to substituted phosphaguanidines, with excellent tolerability to aromatic C-Br and C-Cl
Lithium Bis(trimethylsilyl)amide and Tris(trimethylsilyl)amine
Inorganic Syntheses (1966)
Synlett, 507-507 (1993)
The Journal of Organic Chemistry, 58, 7304-7304 (1993)
Ana I Ojeda-Amador et al.
Inorganic chemistry, 55(11), 5719-5728 (2016-05-14)
Reacting cesium fluoride with an equimolar n-hexane solution of lithium bis(trimethylsilyl)amide (LiHMDS) allows the isolation of CsHMDS (1) in 80% yield (after sublimation). This preparative route to 1 negates the need for pyrophoric Cs metal or organocesium reagents in its

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

      Helpful?

Reviews

No rating value

Active Filters

Nuestro equipo de científicos tiene experiencia en todas las áreas de investigación: Ciencias de la vida, Ciencia de los materiales, Síntesis química, Cromatografía, Analítica y muchas otras.

Póngase en contacto con el Servicio técnico