Iodine and Lipase Based Green Oxidation Technology
... ROOH. Two different mechanisms are possible, involving either oxometal or peroxometal species as the active oxidant (Figure 1.2). ...
... ROOH. Two different mechanisms are possible, involving either oxometal or peroxometal species as the active oxidant (Figure 1.2). ...
A Review of Photocatalysts Prepared by Sol-Gel Method
... configuration, can provide light-induced charges for redox processes. In particular, they are characterized by a filled valence band and an empty conduction band. The elementary mechanisms of photocatalytic transformation include a number of steps, which have been exhaustively described [2–4]. In co ...
... configuration, can provide light-induced charges for redox processes. In particular, they are characterized by a filled valence band and an empty conduction band. The elementary mechanisms of photocatalytic transformation include a number of steps, which have been exhaustively described [2–4]. In co ...
Silylation Overview - Sigma
... Silylation is an important tool in both analytical and synthetic chemistry. Generally all hetero atoms containing active hydrogens, as well as enolisable carbonyl compounds can be silylated (the silylation of carbon atoms is not discussed here). In analytical chemistry, silylation has been used sinc ...
... Silylation is an important tool in both analytical and synthetic chemistry. Generally all hetero atoms containing active hydrogens, as well as enolisable carbonyl compounds can be silylated (the silylation of carbon atoms is not discussed here). In analytical chemistry, silylation has been used sinc ...
Chemistry of Ti(OiPr)Cl3 with Chloride
... Synthesis of Complexes. The reactions of 6 with chloride, THF, benzaldehyde, or methyl benzoate are outlined in Scheme 1. Two mol equiv of chloride, THF, or benzaldehyde added easily to 6 afforded monomeric six-coordinate complexes [Ti(OiPr)Cl5]2-(HAm+)2 (Am ) NEt3 (7a) or NC5H5 (7b)), Ti(OiPr)Cl3(T ...
... Synthesis of Complexes. The reactions of 6 with chloride, THF, benzaldehyde, or methyl benzoate are outlined in Scheme 1. Two mol equiv of chloride, THF, or benzaldehyde added easily to 6 afforded monomeric six-coordinate complexes [Ti(OiPr)Cl5]2-(HAm+)2 (Am ) NEt3 (7a) or NC5H5 (7b)), Ti(OiPr)Cl3(T ...
Electron transfers in chemistry and biology R.A. Marcus a and
... must be fluctuations in other coordinates. As in any reaction the system as a whole proceeds from configurations (coordinates) in the vicinity of the equilibrium ones for the reactants to those for the products. In the present case, these coordinates involve vibrational coordinates of the reactants, ...
... must be fluctuations in other coordinates. As in any reaction the system as a whole proceeds from configurations (coordinates) in the vicinity of the equilibrium ones for the reactants to those for the products. In the present case, these coordinates involve vibrational coordinates of the reactants, ...
Functional Mimics of Superoxide Dismutase Enzymes as
... (catalase has been added to scavenge H2O2, but this adds another potential source of cross reaction and hence interpretive error) or oxygen products of the self-dismutation of superoxide, a reaction which at pH ) 7.4 has a second-order rate constant of ∼1.5 × 105 M-1 s-1 at 21 °C.35 It is also impor ...
... (catalase has been added to scavenge H2O2, but this adds another potential source of cross reaction and hence interpretive error) or oxygen products of the self-dismutation of superoxide, a reaction which at pH ) 7.4 has a second-order rate constant of ∼1.5 × 105 M-1 s-1 at 21 °C.35 It is also impor ...
Recent developments in metal-catalyzed living radical
... ordered structures, metal-catalyzed systems are the most preferable methods in comparison to other living radical polymerization systems for the following reasons. Metal-catalyzed living radical polymerization does not require other carbon radical sources, which may generate new polymer chains as by ...
... ordered structures, metal-catalyzed systems are the most preferable methods in comparison to other living radical polymerization systems for the following reasons. Metal-catalyzed living radical polymerization does not require other carbon radical sources, which may generate new polymer chains as by ...
vysoké učení technické v brně
... materials for biomedical applications during the last two decades. The most attractive is to develop and characterize artificial materials for use in the human body to measure, restore, and improve physiological function with a view to enhance survival and quality of life. Among others biomaterials ...
... materials for biomedical applications during the last two decades. The most attractive is to develop and characterize artificial materials for use in the human body to measure, restore, and improve physiological function with a view to enhance survival and quality of life. Among others biomaterials ...
organic practice problems
... ____ 60. Which of the following molecules is ethanol? a. C2H6 b. CH3CO2H c. CH3CHO d. CH3CH2OH e. CH3OCH3 ____ 61. Which functional group does not contain an oxygen atom? a. alcohol b. amine c. amide d. ester e. ether ____ 62. The functional group RCO2R' is characteristic of an ________. a. ether b. ...
... ____ 60. Which of the following molecules is ethanol? a. C2H6 b. CH3CO2H c. CH3CHO d. CH3CH2OH e. CH3OCH3 ____ 61. Which functional group does not contain an oxygen atom? a. alcohol b. amine c. amide d. ester e. ether ____ 62. The functional group RCO2R' is characteristic of an ________. a. ether b. ...
Nickel complexes of a diphosphine-ketone ligand: oxidation
... chemical properties of the two hydrogen atoms can still vary through influences of other ligands bound to the metal and their respective coordination with regards to the metal-bonded hydrogen atoms (for example, through the trans-effect in square-planar, trigonal bipyramidal or octahedral complexes) ...
... chemical properties of the two hydrogen atoms can still vary through influences of other ligands bound to the metal and their respective coordination with regards to the metal-bonded hydrogen atoms (for example, through the trans-effect in square-planar, trigonal bipyramidal or octahedral complexes) ...
Ryoji Noyori - Nobel Lecture
... simplest but most powerful way to produce a wide array of important compounds in large quantities using inexpensive, clean hydrogen gas without forming any waste. Hydrogenation was initiated at the end of the 19th century by P. Sabatier (1912 Nobel laureate) who used fine metal particles as heterog ...
... simplest but most powerful way to produce a wide array of important compounds in large quantities using inexpensive, clean hydrogen gas without forming any waste. Hydrogenation was initiated at the end of the 19th century by P. Sabatier (1912 Nobel laureate) who used fine metal particles as heterog ...
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.