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696188

1,3-Bis(2,4,6-trimethylphenyl)-1,3-dihydro-2H-imidazol-2-yliden

97%, powder

Synonym(e):

1,3-Bis-(2,4,6-trimethylphenyl)-imidazol-2-yliden

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Größe/SKUVerfügbarkeitPreis
250 mg
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€ 59,40
€ 44,55
1 g
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€ 171,00

Über diesen Artikel

Empirische Formel (Hill-System):
C21H24N2
CAS-Nummer:
Molekulargewicht:
304.43
UNSPSC Code:
12352005
PubChem Substance ID:
NACRES:
NA.22
MDL number:

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Produktname

1,3-Bis(2,4,6-trimethylphenyl)-1,3-dihydro-2H-imidazol-2-yliden, 97%

Quality Segment

assay

97%

form

powder

reaction suitability

reagent type: ligand

mp

140 °C

storage temp.

−20°C

SMILES string

Cc1cc(C)c(N2[C]N(C=C2)c3c(C)cc(C)cc3C)c(C)c1

InChI

1S/C21H24N2/c1-14-9-16(3)20(17(4)10-14)22-7-8-23(13-22)21-18(5)11-15(2)12-19(21)6/h7-12H,1-6H3

InChI key

JCYWCSGERIELPG-UHFFFAOYSA-N

Application

1,3-Bis(2,4,6-trimethylphenyl)-1,3-dihydro-2H-imidazol-2-ylidene (IMes) is a nucleophilic N-heterocyclic carbene (NHC) ligand.
It can be used to synthesize:
  • IMes ligated-rhodium complex as a catalyst for the selective hydrogenation of substituted aryl and heteroaryl boronate esters to cis-substituted borylated cycloalkanes.
  • IMes/ruthenium complex (Cp*Ru(IMes)Cl)(Cp* =η5-C5Me3) as a catalyst for olefin ring closing metathesis reaction.


IMes is also used as an ancillary ligand in Pd-catalyzed Suzuki-Miyaura cross-coupling reaction between aryl chlorides or aryl triflates and arylboronic acids.

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Dieser Artikel
715417696501696277
description

97%

description

-

description

95%

description

Umicore

reaction suitability

reagent type: ligand

reaction suitability

reagent type: ligand

reaction suitability

core: gold, reagent type: catalyst

reaction suitability

core: gold, reagent type: catalyst

assay

97%

assay

-

assay

95%

assay

-

form

powder

form

powder

form

powder

form

powder

Quality Level

100

Quality Level

100

Quality Level

100

Quality Level

100

storage temp.

−20°C

storage temp.

−20°C

storage temp.

2-8°C

storage temp.

2-8°C

mp

140 °C

mp

79-85 °C

mp

>300 °C

mp

298 °C


pictograms

FlameExclamation mark

signalword

Warning

Hazard Classifications

Eye Irrit. 2 - Flam. Sol. 2 - Skin Irrit. 2 - STOT SE 3

target_organs

Respiratory system

Lagerklasse

4.1B - Flammable solid hazardous materials

wgk

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

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



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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/418/501/product-dating-information-06-25-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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