Related Experiment Video
Updated: Mar 12, 2026

Imine Metathesis by Silica-Supported Catalysts Using the Methodology of Surface Organometallic Chemistry
Published on: October 18, 2019
Indenylmetal Catalysis in Organic Synthesis
Barry M Trost1, Michael C Ryan1
1Department of Chemistry, Stanford University, Stanford, CA, 94305-5080, USA.
Indenylmetal complexes offer unique catalytic properties for organic synthesis, differing from well-known cyclopentadienyl analogues. This review highlights their potential in catalyzing small molecule synthesis.
Area of Science:
- Organometallic Chemistry
- Catalysis
- Synthetic Organic Chemistry
Background:
- Transition metal cyclopentadienyl complexes are widely used catalysts in organic synthesis.
- Indenyl ligands, benzo-fused analogues of cyclopentadienyl ligands, possess unique properties.
- The catalytic applications and reactivity of indenylmetal complexes are less explored compared to their cyclopentadienyl counterparts.
Purpose of the Study:
- To review the catalytic applications of indenylmetal complexes.
- To compare the reactivity of indenylmetal complexes with cyclopentadienyl analogues.
- To highlight the potential of indenyl ligands in catalyzing organic transformations.
Main Methods:
- Literature review of indenylmetal complexes in catalysis.
- Comparative analysis of catalytic reactivity between indenyl and cyclopentadienyl systems.
- Examples of indenylmetal complexes used in the synthesis of small molecules.
Main Results:
- Indenylmetal complexes exhibit differential reactivity compared to cyclopentadienyl analogues.
- Specific examples demonstrate the utility of indenyl complexes in various catalytic processes.
- The unique electronic and steric properties of indenyl ligands influence catalytic outcomes.
Conclusions:
- Indenylmetal complexes represent a valuable, yet underexplored, class of catalysts.
- Further investigation into indenylmetal catalysis could lead to novel synthetic methodologies.
- These complexes show promise for efficient synthesis of small molecules.
Related Concept Videos
Properties of Organometallic Compounds
Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.
Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...
Olefin Metathesis Polymerization: Overview
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists of a...
Preparation of Alkynes: Alkylation Reaction
Alkylation of terminal alkynes with primary alkyl halides in the presence of a strong base like sodium amide is one of the common methods for the synthesis of longer carbon-chain alkynes. For example, treatment of 1-propyne with sodium amide followed by reaction with ethyl bromide yields 2-pentyne.

