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682330 Sigma-Aldrich

Grubbs Catalyst® M37a (C884)

Synonym: Dichloro[1,3-bis(2,4,6-trimethylphenyl)-2-imidazolidinylidene](benzylidene)bis(3-bromopyridine)ruthenium(II), Grubbs Catalyst® 3rd Generation, Grubbs Catalyst® C884, [1,3-Bis(2,4,6-trimethylphenyl)-2-imidazolidinylidene]dichloro(phenylmethylene)bis(3-bromopyridine)ruthenium(II), [1,3-Dimesityl-2-imidazolidinylidene]dichloro(phenylmethylene)bis(3-bromopyridine)ruthenium(II)

  • CAS Number 900169-53-1

  • Empirical Formula (Hill Notation) C38H40Br2Cl2N4Ru

  • Molecular Weight 884.54

  •  MDL number MFCD09265164

  •  PubChem Substance ID 329760489

  •  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,
mp   140 °C (dec.)
reaction suitability   reagent type: catalyst
reaction type: Ring-Opening Polymerization
storage temp.   2-8°C



Metathesis: Ruthenium-Based Metathesis Catalysts

Labile pyridine ligands result in a very fast initiator (even at 0 °C). Effective in cross metathesis of acrylonitrile. Also effective in RCM and the ROMP production of block copolymers and polymers with narrow PDIs.


100, 500 mg in glass bottle

2 g in glass bottle

Other Notes

Grubbs Catalyst® Technology for Olefin Metathesis by Aldrich

Legal Information

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 www.pmc.umicore.com.

Grubbs Catalyst is a registered trademark of Umicore

Safety & Documentation

Safety Information

NONH for all modes of transport
WGK Germany 
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 | 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

Ring-Opening Metathesis Polymerization (ROMP)

ROMP has become an important reaction for the formation of well defined polymers. Ziegler and Natta's early studies on ethylene and polypropylene polymerization lead to extensive research efforts on ...
William Sommer
ChemFiles 2009, 9.6, 8.
Keywords: Catalysis, Polymerization reactions, Ring opening metathesis polymerisation

Synthesis of Brush-like Polymers via ROMP

Recently, Cheng and coworkers reported the synthesis of brush-like polymers, by which the main polymer chain was prepared using ROMP followed by polymerization of peptide units on the amine side chai...
William Sommer
Aldrich ChemFiles 2009, 9.6, 8.
Keywords: Chemfiles, Polymerization reactions, Ring opening metathesis polymerisation

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

Peer-Reviewed Papers


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