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225770

Sigma-Aldrich

双(三甲基硅基)氨基锂 溶液

Lithium bis(trimethylsilyl)amide solution

1.0 M in THF

同義詞:

六甲基二硅氮烷 锂盐

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About This Item

線性公式:
[(CH3)3Si]2NLi
CAS號碼:
4039-32-1
分子量：:
167.33
Beilstein:
3567910
MDL號碼:
MFCD00008261
分類程式碼代碼:
12352111
PubChem物質ID:
24853520
NACRES:
NA.22
暫時無法取得訂價和供貨情況

形狀

liquid

品質等級

200

濃度

1.0 M in THF

密度

0.891 g/mL at 25 °C

SMILES 字串

[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 密鑰

YNESATAKKCNGOF-UHFFFAOYSA-N

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相關類別

一般說明

三甲基硅基胺基锂（LHMDS）是一种非亲核强碱，广泛应用于有机合成中的脱保护反应和碱催化反应。它通常可溶于大多数非极性有机溶剂。

應用

双三甲基硅基胺基锂溶液(1.0 M，溶于THF溶液)可用作碱：
  • 催化聚(对苯甲酰胺)合成中的聚合反应。 [1]
  • 用于环状聚（α-类肽）和α-（二氟甲基）苯乙烯的合成。[2]
  • 用于定向醛醇缩合和Darzens缩合反应；芳基酯衍生物的α-芳基化和烯丙基胺化反应。
  • 与六甲基二硅基氮烷钠（NaHMDS）相比，可用于生成动力学烯醇化物（kinetic enolate），因为生成的烯醇化物比NaHMDS生成的烯醇化物更具有区域稳定性（regiostable ）。

包裝

25mL Sure/Seal™瓶推荐用作一次性瓶。 反复穿刺可能导致产品性能下降。
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法律資訊

Sure/Seal is a trademark of Sigma-Aldrich Co. LLC

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產品號碼
描述
訂價

訊號詞

Danger

危險分類

Carc. 2 - Eye Dam. 1 - Flam. Liq. 2 - Skin Corr. 1B - STOT SE 3

標靶器官

Central nervous system, Respiratory system

安全危害

EUH014,EUH019

儲存類別代碼

3 - Flammable liquids

水污染物質分類（WGK）

WGK 2

閃點（°F）

1.4 °F - closed cup

閃點（°C）

-17 °C - closed cup

從最近期的版本中選擇一個：

分析證明 (COA)

Lot/Batch Number
SDBB3149
SHBS5126
SDBB2227
SHBS3362
STBL4247

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存取文件庫

? -(Difluoromethyl) styrene: improved approach to grams scale synthesis
Justyna WK,et al.
Journal of Fluorine Chemistry, 179, 175-178 (2015)
Macromolecules, 39, 5347-5347 (2006)
Nur Hazlin Hazrin-Chong et al.
Journal of microbiological methods, 90(2), 96-99 (2012-05-09)
The use of hexamethyldisilazane (HMDS) as a drying agent was investigated in the specimen preparation for scanning electron microscopy (SEM) imaging of bacterial surface colonization on sub-bituminous coal. The ability of microbes to biofragment, ferment and generate methane from coal
Elsa Vennat et al.
Dental materials : official publication of the Academy of Dental Materials, 25(6), 729-735 (2009-01-29)
The objectives of this study were to assess demineralized dentin porosity and quantify the different porous features distribution within the material using mercury intrusion porosimetry (MIP) technique. We compared hexamethyldisilazane (HMDS) drying and lyophilization (LYO) (freeze-drying) in sample preparation. Fifty-six
Nan Li et al.
Lab on a chip, 8(12), 2105-2112 (2008-11-22)
High-density live cell array serves as a valuable tool for the development of high-throughput immunophenotyping systems and cell-based biosensors. In this paper, we have, for the first time, demonstrated a simple fabrication process to form the hexamethyldisilazane (HMDS) and poly(ethylene
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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/449/386/product-dating-information-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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  3. Is methanol employed in the production process of the Lithium bis(trimethylsilyl)amide solution, product number 225770?

    1 answer

    1. Methanol is not used in the synthesis of product no. 225770 Lithium bis(trimethylsilyl)amide solution. Methanol residue is highly unlikely to be present.

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