Diastereoselective Allylation of Carbonyl Compounds and Imines:
... 4-NO2C6H4CO2H maleic acid 1,2-(CO2H)2C6H4 salicylic acid ...
... 4-NO2C6H4CO2H maleic acid 1,2-(CO2H)2C6H4 salicylic acid ...
Document
... points of aldehydes and ketones are higher than the nonpolar hydrocarbons and the alkyl halides but lower than those of alcohols. Formaldehyde is a gas at room temperature (b.p. = -21 C) but heavier aldehydes are liquids. Acetone, the simplest ketone, is a liquid at room temperature (b.p. = 56 C). ...
... points of aldehydes and ketones are higher than the nonpolar hydrocarbons and the alkyl halides but lower than those of alcohols. Formaldehyde is a gas at room temperature (b.p. = -21 C) but heavier aldehydes are liquids. Acetone, the simplest ketone, is a liquid at room temperature (b.p. = 56 C). ...
Free-Radical Chemistry of Sulfite
... From the point of view of this review, the most important observations have been on the transformation of biological molecules by sulfite in the presence of oxygen. Fridovich and Handler (23) have shown that a mixture of horseradish peroxidase, hydrogen peroxide, and a peroxidizible substance initia ...
... From the point of view of this review, the most important observations have been on the transformation of biological molecules by sulfite in the presence of oxygen. Fridovich and Handler (23) have shown that a mixture of horseradish peroxidase, hydrogen peroxide, and a peroxidizible substance initia ...
General Introduction.
... four- or six-center transition states with partial charges on the atoms. Similarly a synchronous four-center or six-center transition state (Figure 1) has been suggested for reactions of metal-carbon bonds with polar substrates. The polarity of the M-C bond varies strongly. Not only the metal (natur ...
... four- or six-center transition states with partial charges on the atoms. Similarly a synchronous four-center or six-center transition state (Figure 1) has been suggested for reactions of metal-carbon bonds with polar substrates. The polarity of the M-C bond varies strongly. Not only the metal (natur ...
DEPARTMENT OF CHEMISTRY, UNIVERSITY OF JYVÄSKYLÄ
... Chemistry is all about the ability of elements to bind together and form different compounds. Hence, understanding the rules governing the formation of chemical bonds has been a priority for chemists for hundreds of years. The modern description of chemical bonding is based on quantum theory and the ...
... Chemistry is all about the ability of elements to bind together and form different compounds. Hence, understanding the rules governing the formation of chemical bonds has been a priority for chemists for hundreds of years. The modern description of chemical bonding is based on quantum theory and the ...
Computational aspects of hydroformylation
... a balancing between accuracy and computational cost. According to Xu and Truhlar the def2-TZVP47 (TZVP stands for valence triple-z with polarization functions) basis set is recommended for organometallic systems,48 whereas Schaefer et al. found that double-z basis sets oen predict reliable structur ...
... a balancing between accuracy and computational cost. According to Xu and Truhlar the def2-TZVP47 (TZVP stands for valence triple-z with polarization functions) basis set is recommended for organometallic systems,48 whereas Schaefer et al. found that double-z basis sets oen predict reliable structur ...
Slide 1
... Elimination Reactions involving Amines Amines can under go two different types of elimination reactions that give alkenes. Hofmann elimination: An amine is exhaustively methylated to the quaternary ammonium salt. The halide salt is converted to the hydroxide salt by treatment with silver oxide. The ...
... Elimination Reactions involving Amines Amines can under go two different types of elimination reactions that give alkenes. Hofmann elimination: An amine is exhaustively methylated to the quaternary ammonium salt. The halide salt is converted to the hydroxide salt by treatment with silver oxide. The ...
Limiting Reactants and Percentage Yield
... Sample Problem G The black oxide of iron, Fe3O4, occurs in nature as the mineral magnetite. This substance can also be made in the laboratory by the reaction between red-hot iron and steam according to the following equation. 3Fe(s) + 4H2O(g) → Fe3O4(s) + 4H2(g) a. When 36.0 g H2O are mixed with ...
... Sample Problem G The black oxide of iron, Fe3O4, occurs in nature as the mineral magnetite. This substance can also be made in the laboratory by the reaction between red-hot iron and steam according to the following equation. 3Fe(s) + 4H2O(g) → Fe3O4(s) + 4H2(g) a. When 36.0 g H2O are mixed with ...
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.