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682365 Sigma-Aldrich

Grubbs Catalyst® M207


Synonym: Dichloro[1,3-bis(2,4,6-trimethylphenyl)-2-imidazolidinylidene](3-methyl-2-butenylidene) (tricyclohexylphosphine)ruthenium(II), Grubbs Catalyst® M2b (C827), Isopentenylidene(1,3-dimesitylimidazolidin-2-ylidene) (tricyclohexylphosphine)ruthenium(II) dichloride, [SIMes]dichloro(3-methyl-2-butenylidene)(tricyclohexylphosphine)Ru(II)

  • CAS Number 253688-91-4

  • Empirical Formula (Hill Notation) C44H67Cl2N2PRu

  • Molecular Weight 826.97

  •  MDL number MFCD09265165

  •  PubChem Substance ID 24885711

  •  NACRES NA.22



Related Categories Catalysis and Inorganic Chemistry, Catalysts for Polymerization, Chemical Synthesis, Grubbs Catalyst Technology for Olefin Metathesis by Sigma-Aldrich, Materials Science,
Quality Level   100
reaction suitability   reagent type: catalyst
reaction type: Olefin Metathesis
storage temp.   2-8°C
SMILES string   C1CCC(CC1)P(C2CCCCC2)C3CCCCC3.C\C(C)=C/C=[Ru](Cl)(Cl)=C4N(CCN4c5c(C)cc(C)cc5C)c6c(C)cc(C)cc6C
InChI   1S/C21H26N2.C18H33P.C5H8.2ClH.Ru/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;1-4-10-16(11-5-1)19(17-12-6-2-7-13-17)18-14-8-3-9-15-18;1-4-5(2)3;;;/h9-12H,7-8H2,1-6H3;16-18H,1-15H2;1,4H,2-3H3;2*1H;/q;;;;;+2/p-2



A general purpose olefin metathesis catalyst similar in reactivity to Grubbs Catalyst® 2nd Generation.


100, 500 mg in glass bottle

2 g in glass bottle

Other Notes

Grubbs Catalyst® Technology for Olefin Metathesis by Aldrich

Legal Information

Product of Umicore

Product License
This product, its manufacturing or use, is the subject of one or more issued or pending U.S. Patents (and foreign equivalents) owned or controlled by Umicore PMC. The purchase of this product from Umicore PMC through Sigma-Aldrich, its affiliates or their authorized distributors conveys to the buyer a limited, one-time, non-exclusive, non-transferable, non-assignable license. Buyer’s use of this product may infringe patents owned or controlled by third parties. It is the sole responsibility of buyer to ensure that its use of the product does not infringe the patent rights of third parties or exceed the scope of the license granted herein.

For any further information on product please refer to your local Umicore PMC contact at http://www.pmc.umicore.com

Grubbs Catalyst is a registered trademark of Umicore

Safety & Documentation

Safety Information

GHS02  GHS02
Signal word 
Hazard statements 
Precautionary statements 
Personal Protective Equipment 
UN1325 - class 4.1 - PG 2 - Flammable solids, organic, n.o.s., HI: all
WGK Germany 
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable


Certificate of Analysis (COA)

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Protocols & Articles


Grubbs Group - Professor Product Portal

From our library of Articles, Sigma-Aldrich presents Grubbs Group - Professor Product Portal
Keywords: Catalysis, Cross metathesis, Dihydroxylations, Ligands, Metathesis, Nuclear magnetic resonance spectroscopy, Olefin metathesis, Pharmaceutical, Spectroscopy, transformation

Ring Closing Metathesis Reaction Screening Kit Materials

The screening sets come pre-loaded with 1 µmol of catalyst in each vial according to the following design.
Keywords: High performance liquid chromatography, Metathesis, Ring-closing metathesis

Ring-Closing Metathesis | Aldrich ChemFiles 2009, 9.6, 4.

Ring-closing metathesis has become an essential tool for C-C bond formation as demonstrated by the profound impact on total synthesis in recent years.1 The first examples date back to 1980 and involv...
William Sommer
Aldrich ChemFiles 2009, 9.6, 4.
Keywords: C-C bond formation, Cyclizations, Metathesis, Ring-closing metathesis

Related Content

Metathesis in Chemical Synthesis

Olefin metathesis is now a well-entrenched synthetic technique, and is a powerful method for the clean construction of innumerable classes of chemical architectures. The broadly accepted belief that ...
Keywords: Building blocks, Cross metathesis, Enyne metathesis, Exothermic, Isomerizations, Ligands, Living polymerization, Metathesis, Olefin metathesis, Organic synthesis, Polymerization reactions, Ring opening metathesis polymerisation, Ring-closing metathesis

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