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Lithium-bis-(trimethylsilyl)-amid -Lösung

1 M in toluene

Synonym(e):

Hexamethyldisilazan Lithiumsalz

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Größe/SKUVerfügbarkeitPreis
100 mL
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€ 82,60
800 mL
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€ 366,00

Über diesen Artikel

Lineare Formel:
[(CH3)3Si]2NLi
CAS-Nummer:
Molekulargewicht:
167.33
UNSPSC Code:
12352111
NACRES:
NA.22
PubChem Substance ID:
MDL number:
Beilstein/REAXYS Number:
3567910
eCl@ss:
32150917
Concentration:
1 M in toluene

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Quality Segment

concentration

1 M in toluene

density

0.860 g/mL at 25 °C

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

General description

Lithium bis(trimethylsilyl)amide solution (LiHMDS) is generally used in organic synthesis as a non-nucleophilic strong Bronsted base.

Application

Lithium bis(trimethylsilyl)amide is generally used in organic synthesis as a non-nucleophilic strong Brønsted base. It can be used for salt metathesis reaction for the synthesis of cesium bis(trimethylsilyl)amide (CsHMDS) and lithium fluoride by reacting with cesium fluoride.
LiHMDS can be used as a reagent:
  • In the deprotonation and nucleophilic difluoromethylation reactions.
  • To synthesize isoquinoline derivatives by the addition of N-iodosuccinimide (NIS) to the α-benzyl tosylmethyl isocyanides.
  • To prepare arylboronic acid pinacol esters by the reaction of aryl fluorides with bis(pinacolato)diboron via palladium-catalyzed cross-coupling reaction.


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Dieser Artikel
775053224367766917
description

1 M in toluene

description

0.5 M in 2-methyltetrahydrofuran

description

1.0 M in hexanes

description

1.5 M in THF

concentration

1 M in toluene

concentration

0.5 M in 2-methyltetrahydrofuran

concentration

1.0 M in hexanes

concentration

1.5 M in THF

Quality Level

200

Quality Level

100

Quality Level

100

Quality Level

100

density

0.860 g/mL at 25 °C

density

0.857 g/mL at 25 °C

density

0.707 g/mL at 25 °C

density

0.893 g/mL at 25 °C


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Signalwort

Danger

Hazard Classifications

Aquatic Chronic 3 - Asp. Tox. 1 - Eye Dam. 1 - Flam. Liq. 2 - Repr. 2 - Self-heat. 1 - Skin Corr. 1B - STOT RE 2 - STOT SE 3

Zielorgane

Central nervous system

supp_hazards

Lagerklasse

4.2 - Pyrophoric and self-heating hazardous materials

Was ist los?

WGK 3

Flammpunkt (°F)

48.0 °F - closed cup

Flammpunkt (°C)

8.9 °C - closed cup

PSA (Persönliche Schutzausrüstung)

Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter


Zulassungslistungen

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108-88-3

CAS No.


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Analysenzertifikate (COA)

Lot/Batch Number

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Questions

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  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/418/501/product-dating-information-06-25-mk.pdf

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  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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