The First Isolated Abnormal N-Heterocyclic Carbene in Designing Homogeneous Catalysts

Sau, Samaresh Chandra (2015) The First Isolated Abnormal N-Heterocyclic Carbene in Designing Homogeneous Catalysts. PhD thesis, Indian Institute of Science Education and Research Kolkata.

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The isolation of heteroatom stabilized carbene [normal N-heterocyclic carbene (nNHC)] has led to numerous catalytic applications in organometallic chemistry. The objectives of the work were to investigate the catalytic activity of the first isolated aNHC ligand itself as organocatalysts as well as its transition metal complexes in various organic transformations. It aims to develop of transition metal based organometallic complexes using the isolated aNHC and their characterization by NMR and X-ray crystallographic studies. It tests the efficacy of these aNHC metal complexes in important organic transformations. It also checks whether this isolated aNHC can be used as an efficient building block in designing new concept in catalysis. To conclude with it tests the efficacy of this aNHC in activating greenhouse gas such as CO2 and its catalytic conversion into alternative fuel such as methanol. In essence, it can be saod that the present study documented the first few application and synthesis of well defined new catalytic systems based on isolated abnormal N-heterocyclic carbene for different valuable organic transformation reactions. The present study not only develops transition metal based complexes for Suzuki–Miyaura cross-coupling reaction and Huisgen 1,3- dipolar cycloaddition reaction but also established nontoxic, metal free organocatalyst for carbon dioxide reduction to methanol. Apart from this traditional mono catalysis approach, we established an effective protocol to integrate organometallic catalysis (click reaction) and organocatalysis {aza-Michael addition/multicomponent reactions (MCRs)} in the same reaction pot, in which the product of the first catalytic cycle acts as the catalyst for the second catalytic step.

Item Type: Thesis (PhD)
Additional Information: Supervisor: Dr. Swadhin K. Mandal
Uncontrolled Keywords: Abnormal Binding; Homogeneous Catalysts; Isolated Abnormal N-Heterocyclic Carbene; N-Heterocyclic Carbene; Organometallic Chemistry; Suzuki–Miyaura Cross-coupling Reaction
Subjects: Q Science > QD Chemistry
Divisions: Department of Chemical Sciences
Depositing User: IISER Kolkata Librarian
Date Deposited: 21 Jun 2016 08:55
Last Modified: 21 Jun 2016 08:55

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