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About This Item
Linear Formula:
[(CH3)3Si]2NK
CAS Number:
Molecular Weight:
199.48
Beilstein/REAXYS Number:
4006754
MDL number:
UNSPSC Code:
12352111
PubChem Substance ID:
NACRES:
NA.22
Quality Level
assay
95%
form
solid
density
0.877 g/cm3 at 20 °C
SMILES string
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
InChI key
IUBQJLUDMLPAGT-UHFFFAOYSA-N
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General description
Potassium bis(trimethylsilyl)amide is commonly abbreviated as KHMDS with molecular formula [(CH3)3Si]2NK. It is widely used as Bronsted base in synthesis.
KHMDS is a base catalyst, that shows high activity and selectivity for the alkylation of alkylpyridines.
KHMDS is a base catalyst, that shows high activity and selectivity for the alkylation of alkylpyridines.
Application
Anionic initiator used in the preparation of poly(ethylene oxide). Sterically hindered base employed in selective cyclization reactions. Also used in the preparation of lanthanide complexes.
Features and Benefits
Potassium bis(trimethylsilyl)amide (KHMDS):
- Easily available.
- Good selectivity for the benzylic C−H bonds.
- Good reactivity for sterically crowded C−H bonds.
signalword
Danger
hcodes
Hazard Classifications
Eye Dam. 1 - Skin Corr. 1B
supp_hazards
Storage Class
8A - Combustible corrosive hazardous materials
wgk_germany
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges
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