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1 Iron Complexes in Organic Chemistry
1 Iron Complexes in Organic Chemistry

... Iron forms three stable homoleptic complexes with carbon monoxide, pentacarbonyliron (Fe[CO]5), nonacarbonyldiiron (Fe2[CO]9) and dodecacarbonyltriiron (Fe3[CO]12) (Figure 1.1). Pentacarbonyliron is a stable 18-electron complex of trigonal-bipyramidal geometry and represents the primary source of mo ...
Organic Chemistry II Introduction
Organic Chemistry II Introduction

BSA - Sigma
BSA - Sigma

102MSJc14 - Louisiana Tech University
102MSJc14 - Louisiana Tech University

... for one or more known reactions (Section 14.2). 5. Calculate Kp from K, or Kc from Kp for the same equilibrium (Section 14.2). 6. Calculate a value of K, for an equilibrium system, given information about initial concentrations and equilibrium concentrations (Section 14 3). 7. Make qualitative predi ...
cleavage of methyl ethers with iodotrimethylsilane
cleavage of methyl ethers with iodotrimethylsilane

chem 102 class notes - Louisiana Tech University
chem 102 class notes - Louisiana Tech University

... for one or more known reactions (Section 14.2). 5. Calculate Kp from K, or Kc from Kp for the same equilibrium (Section 14.2). 6. Calculate a value of K, for an equilibrium system, given information about initial concentrations and equilibrium concentrations (Section 14 3). 7. Make qualitative predi ...
Energetics - chemistryatdulwich
Energetics - chemistryatdulwich

JOURNAL OF FLOW CHEMISTRY (ISSN: 2062
JOURNAL OF FLOW CHEMISTRY (ISSN: 2062

... enantiomerically pure compounds, the armoury of novel stereoselective synthetic methods is continuously expanding. The use of biocatalysts for these purposes grows with this expansion16-19 since biocatalysis often requires milder conditions in stereoselective reaction than chemocatalysis. Hydrolases ...
Heterogeneous Catalysis and Solid Catalysts
Heterogeneous Catalysis and Solid Catalysts

... catalyst can enhance the rate of a thermodynamically feasible reaction but cannot change the position of the thermodynamic equilibrium. Most catalysts are solids or liquids, but they may also be gases. The catalytic reaction is a cyclic process. According to a simplified model, the reactant or react ...
Alcohols
Alcohols

... Reaction is common in the laboratory and in living organisms • In the laboratory the reaction can be carried out in a single step if a strong acid is used as catalyst • The reactivity of the carboxylic acid is enhanced by first converting it into a carboxylic acid chloride, which then reacts with th ...
Alkenes
Alkenes

Vanadium complexes containing amido functionalized
Vanadium complexes containing amido functionalized

... complex (M = Ti, Zr, Hf).4a Just before this thesis was completed, a theoretical study was published in which the potential of complexes of the first row metals Ti, V, Cr and Mn with a d-electron count of 1-4 as olefin polymerization catalysts was discussed. Based on the study of elementary steps as ...
Hemilanthanidocene for the polymerization of styrene : from
Hemilanthanidocene for the polymerization of styrene : from

21 More About Amines • Heterocyclic Compounds
21 More About Amines • Heterocyclic Compounds

Energetics - chemistryatdulwich
Energetics - chemistryatdulwich

Recent developments in the synthesis of functional poly(olefin)s
Recent developments in the synthesis of functional poly(olefin)s

For Peer Review Only
For Peer Review Only

... chains bearing double bonds (oleic, linoleic, linolenic, ricinoleic acids…). These natural ...
Fulltext PDF - Indian Academy of Sciences
Fulltext PDF - Indian Academy of Sciences

... on cyclic thioether-aminophosphonite type of ligands, either in coordination chemistry or in catalysis. Holmes and co-workers have reported several eight-membered cyclic P, S compounds where sulphur shows coordinative interaction towards phosphorus. 19 They have shown that the donor action provided ...
Complexes. X-ray Structure of Rh1[C6H,(CH2NMe2),-o ,o`
Complexes. X-ray Structure of Rh1[C6H,(CH2NMe2),-o ,o`

couverture these PRES Toulouse M ESCARCEGA 2011
couverture these PRES Toulouse M ESCARCEGA 2011

A Chromium(III)−Superoxo Complex in Oxygen Atom Transfer
A Chromium(III)−Superoxo Complex in Oxygen Atom Transfer

... demonstrated in the oxidation of para-substituted thioanisoles. Thus, the present results report a chemical model of CDO and are discussed in light of the role of an iron(III)−superoxo intermediate in the oxidation of cysteine in CDO (see Schemes 1 and 2). The Cr(III)−superoxo complex, [CrIII(O2)(TM ...
Advanced Organic Chemistry (Chapter 7)
Advanced Organic Chemistry (Chapter 7)

Organic Chemistry II with Dr Roche
Organic Chemistry II with Dr Roche

... The reaction of hydroxide (or alkoxide) with a symmetric epoxide generates anti diols (or alkoxy alcohols) identical to those produced under acidic conditions. ...
Module II Reduction Reactions
Module II Reduction Reactions

View - MPG.PuRe
View - MPG.PuRe

< 1 ... 14 15 16 17 18 19 20 21 22 ... 148 >

Ring-closing metathesis



Ring-closing metathesis, or RCM, is a widely used variation of olefin metathesis in organic chemistry for the synthesis of various unsaturated rings via the intramolecular metathesis of two terminal alkenes, which forms the cycloalkene as the E- or Z- isomers and volatile ethylene.The most commonly synthesized ring sizes are between 5-7 atoms; however, reported syntheses include 45- up to 90- membered macroheterocycles. These reactions are metal-catalyzed and proceed through a metallacyclobutane intermediate. It was first published by Dider Villemin in 1980 describing the synthesis of an Exaltolide precursor, and later become popularized by Robert H. Grubbs and Richard R. Schrock, who shared the Nobel Prize in Chemistry, along with Yves Chauvin, in 2005 for their combined work in olefin metathesis. RCM is a favorite among organic chemists due to its synthetic utility in the formation of rings, which were previously difficult to access efficiently, and broad substrate scope. Since the only major by-product is ethylene, these reactions may also be considered atom economic, an increasingly important concern in the development of green chemistry.There are several reviews published on ring-closing metathesis.
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