Enzyme-catalyzed processes in organic solvents
... enzyme should be readily available and inexpensive; (ii) the enzyme should be cofactor-independent, as common cofactors are insoluble in organic solvents; (iii) substrates should be soluble in organic media; and (iv) water should be a nonreactant in the enzymatic process. Lipases (EC 3.1.1.3) meet a ...
... enzyme should be readily available and inexpensive; (ii) the enzyme should be cofactor-independent, as common cofactors are insoluble in organic solvents; (iii) substrates should be soluble in organic media; and (iv) water should be a nonreactant in the enzymatic process. Lipases (EC 3.1.1.3) meet a ...
Rhenium Nanochemistry for Catalyst Preparation
... methylene bridging unit between the oxide support and the rhenium center. This bridge is converted then into an alkylydene unit and a new oxo-bridge is formed instead (see Scheme 5) [25]. The molecular models of this surfaced intermediate complex have shown activity in the ring-opening polymerizatio ...
... methylene bridging unit between the oxide support and the rhenium center. This bridge is converted then into an alkylydene unit and a new oxo-bridge is formed instead (see Scheme 5) [25]. The molecular models of this surfaced intermediate complex have shown activity in the ring-opening polymerizatio ...
3. Organic Compounds: Alkanes and
... Decalin consists of two cyclohexane rings joined to share two carbon atoms (the bridgehead carbons, C1 and C6) and a common bond Two isomeric forms of decalin: trans fused or cis fused In cis-decalin hydrogen atoms at the bridgehead carbons are on the same face of the rings In trans-decalin, the bri ...
... Decalin consists of two cyclohexane rings joined to share two carbon atoms (the bridgehead carbons, C1 and C6) and a common bond Two isomeric forms of decalin: trans fused or cis fused In cis-decalin hydrogen atoms at the bridgehead carbons are on the same face of the rings In trans-decalin, the bri ...
03-Chemical Rxns n Stoichiometry
... weights for the atoms in a chemical formula. • This is the quantitative significance of a formula. • The formula weight of calcium chloride, CaCl2, would be Ca: 1(40.08 amu) + Cl: 2(35.453 amu) 110.99 amu Stoichiometry © 2015 Pearson Education, Inc. ...
... weights for the atoms in a chemical formula. • This is the quantitative significance of a formula. • The formula weight of calcium chloride, CaCl2, would be Ca: 1(40.08 amu) + Cl: 2(35.453 amu) 110.99 amu Stoichiometry © 2015 Pearson Education, Inc. ...
Gas phase chemistry of neutral metal clusters
... Kappes and Staley’s experimental investigation of CO oxidation by N2 O catalyzed by isolated FeO+ (or Fe+ ) in 1981 started the study of gas phase molecular heterogeneous catalysis [41]. After more than two decades, many examples of catalytic cycles facilitated by metal atoms [42–45], metal clusters ...
... Kappes and Staley’s experimental investigation of CO oxidation by N2 O catalyzed by isolated FeO+ (or Fe+ ) in 1981 started the study of gas phase molecular heterogeneous catalysis [41]. After more than two decades, many examples of catalytic cycles facilitated by metal atoms [42–45], metal clusters ...
Organometallics - X-Ray - University of Kentucky
... eVolVes thermally and/or photochemically into a bis(methylidene) complex (PNP)Ta(dCH2)2 (4). The identity of the latter has been established by X-ray structural, NMR spectroscopic, and DFT computational studies. It does not appear that 4 possesses agostic interactions in solution. High oxidation sta ...
... eVolVes thermally and/or photochemically into a bis(methylidene) complex (PNP)Ta(dCH2)2 (4). The identity of the latter has been established by X-ray structural, NMR spectroscopic, and DFT computational studies. It does not appear that 4 possesses agostic interactions in solution. High oxidation sta ...
Solutions_C19
... For CO: Oxygen has a – 2 oxidation number. Therefore, carbon must have a + 2 oxidation number. For SO3: Oxygen has a – 2 oxidation number. The three oxygen atoms have a combined – 6 oxidation number. Sulfur must have a + 6 oxidation number to balance out the molecule. Final oxidation numbers C(+4)O2 ...
... For CO: Oxygen has a – 2 oxidation number. Therefore, carbon must have a + 2 oxidation number. For SO3: Oxygen has a – 2 oxidation number. The three oxygen atoms have a combined – 6 oxidation number. Sulfur must have a + 6 oxidation number to balance out the molecule. Final oxidation numbers C(+4)O2 ...
A Practical RuCl3-Catalyzed Oxidation Using Trichloroisocyanuric
... Corey’s pyridinium dichromate (PDC) in DMF4b could have been used more frequently to oxidize primary alcohols 1 to carboxylic acids 3 because of the neutral nature of the reaction (Scheme 1). However, besides the hazardous nature of the chromium species in PDC, use of the polar solvent of DMF has ke ...
... Corey’s pyridinium dichromate (PDC) in DMF4b could have been used more frequently to oxidize primary alcohols 1 to carboxylic acids 3 because of the neutral nature of the reaction (Scheme 1). However, besides the hazardous nature of the chromium species in PDC, use of the polar solvent of DMF has ke ...
Functional Groups - Manasquan Public Schools
... ORGANIC CHEMISTRY Any molecule that contains the element ...
... ORGANIC CHEMISTRY Any molecule that contains the element ...
Organometallic Methods for Forming and Cleaving Carbon
... First and foremost, I would like to show my gratitude to Prof. Robert Madsen for accepting me in his group and for his valuable guidance and expertise during my time as a Ph.D. student. I deeply appreciate Dr. Phil. Torkil Holm for sharing his experience and for fruitful discussions. I would very mu ...
... First and foremost, I would like to show my gratitude to Prof. Robert Madsen for accepting me in his group and for his valuable guidance and expertise during my time as a Ph.D. student. I deeply appreciate Dr. Phil. Torkil Holm for sharing his experience and for fruitful discussions. I would very mu ...
Solutions_C19
... For CO: Oxygen has a – 2 oxidation number. Therefore, carbon must have a + 2 oxidation number. For SO3: Oxygen has a – 2 oxidation number. The three oxygen atoms have a combined – 6 oxidation number. Sulfur must have a + 6 oxidation number to balance out the molecule. Final oxidation numbers C(+4)O2 ...
... For CO: Oxygen has a – 2 oxidation number. Therefore, carbon must have a + 2 oxidation number. For SO3: Oxygen has a – 2 oxidation number. The three oxygen atoms have a combined – 6 oxidation number. Sulfur must have a + 6 oxidation number to balance out the molecule. Final oxidation numbers C(+4)O2 ...
Ethers - Home - KSU Faculty Member websites
... The common names of ethers are derived by naming the alkyl groups bonded to the oxygen then listing them in alphabetical order followed by the word "ether". IUPAC names The ether functional group does not have a characteristic IUPAC nomenclature suffix, so it is necessary to designate the smaller al ...
... The common names of ethers are derived by naming the alkyl groups bonded to the oxygen then listing them in alphabetical order followed by the word "ether". IUPAC names The ether functional group does not have a characteristic IUPAC nomenclature suffix, so it is necessary to designate the smaller al ...
Copper-Catalyzed Coupling Reactions Using Carbon
... incorporate the use of C-H bonds as substrates for C-C bond formation processes. In this chapter, a concise review of oxidative cross-coupling reactions relevant to this thesis will be presented. Furthermore, the examples will be focused heavily on the use of organic peroxides as the oxidant, with s ...
... incorporate the use of C-H bonds as substrates for C-C bond formation processes. In this chapter, a concise review of oxidative cross-coupling reactions relevant to this thesis will be presented. Furthermore, the examples will be focused heavily on the use of organic peroxides as the oxidant, with s ...
Kinetic modelling of the Maillard reaction between proteins and sugars
... 1.3 Sugar degradation ...
... 1.3 Sugar degradation ...
Exam 1
... Which one of the following statements about percentage of ethanol in the vapours shown at points X, Y and Z, when the temperature is at a constant 78°C, is true? A. The percentage of ethanol in the vapours at X is equal to 50%. B. The percentages of ethanol in the vapours increase in order at positi ...
... Which one of the following statements about percentage of ethanol in the vapours shown at points X, Y and Z, when the temperature is at a constant 78°C, is true? A. The percentage of ethanol in the vapours at X is equal to 50%. B. The percentages of ethanol in the vapours increase in order at positi ...
Test1-W09-C12-13
... 26. In which of the following pairs of names do both names represent the same ether? A) diethyl ether and 1,2-diethoxyethane B) methyl isopropyl ether and 1-methoxypropane C) ethyl isopropyl ether and 2-ethoxypropane D) more than one correct response E) no correct response ...
... 26. In which of the following pairs of names do both names represent the same ether? A) diethyl ether and 1,2-diethoxyethane B) methyl isopropyl ether and 1-methoxypropane C) ethyl isopropyl ether and 2-ethoxypropane D) more than one correct response E) no correct response ...
The Effects of Ozone on Compounds in Epicuticular Waxes in Plant
... epicuticular waxes by comparing the standard to the ozonized product using various analytical techniques. Ozone is a reactive environmental pollutant that impacts the structure of epicuticular waxes on plant leaves. It is unclear whether this change in structure is caused by a modification in plant ...
... epicuticular waxes by comparing the standard to the ozonized product using various analytical techniques. Ozone is a reactive environmental pollutant that impacts the structure of epicuticular waxes on plant leaves. It is unclear whether this change in structure is caused by a modification in plant ...
Question Bank
... A chemical equation represents a chemical reaction occurring in a chemical change. ...
... A chemical equation represents a chemical reaction occurring in a chemical change. ...
Chemistry 134 Problem Set Introduction
... 14.38 (a) What is the difference between a sapphire and a ruby? (b) Why might aluminum be present with silicon in many minerals? 14.39 (a) List the stable oxidation states for each member of the boron family. (b) For any element that may have more than one stable oxidation state, identify the more s ...
... 14.38 (a) What is the difference between a sapphire and a ruby? (b) Why might aluminum be present with silicon in many minerals? 14.39 (a) List the stable oxidation states for each member of the boron family. (b) For any element that may have more than one stable oxidation state, identify the more s ...
STOICHIOMETRY via ChemLog - Small
... What is the mass of 1 mole of ozone, O3? You may be wondering, how scientists came up with Avogadro’s number - 6.022 x 1023 isn’t a number one normally thinks of off the top of one’s head! Well, Amadeo Avogardro was not the first scientist who realized this number. However, he was the first scientis ...
... What is the mass of 1 mole of ozone, O3? You may be wondering, how scientists came up with Avogadro’s number - 6.022 x 1023 isn’t a number one normally thinks of off the top of one’s head! Well, Amadeo Avogardro was not the first scientist who realized this number. However, he was the first scientis ...
Lectures on Chapter 4, Part 2 Powerpoint 97 Document
... To balance electrons we must put a 4 in front of the Ag, since each oxygen looses two electrons, and they come two per O2! That requires us to put a 4 in front of the silver complex, yielding 8 cyanide ions. 4 Ag(s) + 8 CN -(aq) + O2 (g) 4 Ag(CN)2-(aq) + OH -(aq) We have no hydrogens on the reactant ...
... To balance electrons we must put a 4 in front of the Ag, since each oxygen looses two electrons, and they come two per O2! That requires us to put a 4 in front of the silver complex, yielding 8 cyanide ions. 4 Ag(s) + 8 CN -(aq) + O2 (g) 4 Ag(CN)2-(aq) + OH -(aq) We have no hydrogens on the reactant ...
HONORS LAB MANUAL - Tenafly High School
... magnesium forms during the heating in air. In step 5, water was added to the contents in the crucible to convert this compound into magnesium oxide. The odor indicated that ammonia was also formed in the reaction with water. What was the formula of the other magnesium compound? Answer by writing and ...
... magnesium forms during the heating in air. In step 5, water was added to the contents in the crucible to convert this compound into magnesium oxide. The odor indicated that ammonia was also formed in the reaction with water. What was the formula of the other magnesium compound? Answer by writing and ...
Organic Chemistry Notes
... Trans isomer: 2 groups are Transverse(opposite sides of double bond) to each other Exercises Heb p.230 #26-28 V- Aromatic Compounds Benzene C6H6 has the following structure ...
... Trans isomer: 2 groups are Transverse(opposite sides of double bond) to each other Exercises Heb p.230 #26-28 V- Aromatic Compounds Benzene C6H6 has the following structure ...
Strychnine total synthesis
Strychnine total synthesis in chemistry describes the total synthesis of the complex biomolecule strychnine. The first reported method by the group of Robert Burns Woodward in 1954 is considered a classic in this research field. At the time it formed the natural conclusion to an elaborate process of molecular structure elucidation that started with the isolation of strychnine from the beans of Strychnos ignatii by Pierre Joseph Pelletier and Joseph Bienaimé Caventou in 1818. Major contributors to the entire effort were Sir Robert Robinson with over 250 publications and Hermann Leuchs with another 125 papers in a time span of 40 years. Robinson was awarded the Nobel Prize in Chemistry in 1947 for his work on alkaloids, strychnine included. The process of chemical identification was completed with publications in 1946 by Robinson and later confirmed by Woodward in 1947. X-ray structures establishing the absolute configuration became available between 1947 and 1951 with publications from J. M. Bijvoet and J.H. Robertson .Woodward published a very brief account on the strychnine synthesis in 1954 (just 3 pages) and a lengthy one (42 pages) in 1963.Many more methods exist and reported by the research groups of Magnus, Overman, Kuehne, Rawal, Bosch, Vollhardt, Mori, Shibasaki, Li, Fukuyama Vanderwal and MacMillan. Synthetic (+)-strychnine is also known. Racemic synthesises were published by Padwa in 2007 and in 2010 by Andrade and by Reissig.In his 1963 publication Woodward quoted Sir Robert Robinson who said for its molecular size it is the most complex substance known.