Name (Last, First)
... The object is to show that structural formulas do not represent the geometry of a molecule and when one speaks of a “straight chain” hydrocarbon one is not referring to a carbon framework with angles of 180°. The principal function of a structural formula is to show which atoms are bonded to which. ...
... The object is to show that structural formulas do not represent the geometry of a molecule and when one speaks of a “straight chain” hydrocarbon one is not referring to a carbon framework with angles of 180°. The principal function of a structural formula is to show which atoms are bonded to which. ...
PP - Columbia University
... • So when calulating Go, instead of writing in “55” when water participates in a reaction (e.g., a hydrolysis) we write “1.” • This is not cheating; we are in charge of what is a “standard” condition, and we all agree to this: 55 M H20 is unit (“1”) concentration for the purpose of defining Go. ...
... • So when calulating Go, instead of writing in “55” when water participates in a reaction (e.g., a hydrolysis) we write “1.” • This is not cheating; we are in charge of what is a “standard” condition, and we all agree to this: 55 M H20 is unit (“1”) concentration for the purpose of defining Go. ...
Exam 1 Review Sheet Chapter 15 Chemistry 110b
... composition and reaction (review the mechanism). Ozonolysis of alkenes (review from first semester). DIBAL reduction of esters; know the structure of the reagent and mechanism of reaction. Extend your mechanistic insights to the DIBAL reduction of nitriles. Li(Ot-Bu)3AlH reduction of acid chlorides ...
... composition and reaction (review the mechanism). Ozonolysis of alkenes (review from first semester). DIBAL reduction of esters; know the structure of the reagent and mechanism of reaction. Extend your mechanistic insights to the DIBAL reduction of nitriles. Li(Ot-Bu)3AlH reduction of acid chlorides ...
Chapter 11 Review sheet Name
... A chemical change in which two or more substances combine to form a more complex substance is called a(n) (7) reaction. A change in which a substance is broken down into simpler substances is called a(n) (8) reaction. If the change is caused by heat supplied to the reaction, the Greek symbol (9) is ...
... A chemical change in which two or more substances combine to form a more complex substance is called a(n) (7) reaction. A change in which a substance is broken down into simpler substances is called a(n) (8) reaction. If the change is caused by heat supplied to the reaction, the Greek symbol (9) is ...
The First Chiral Organometallic Triangle for Asymmetric Catalysis
... bisignate band corresponding to naphthyl π f π* transitions and two minor bands due to the other two lower energy π f π* transitions (Figure 1). CD spectra of 1-4 exhibited these three bands similar to L1-4, but with red-shifts in energy and higher intensities. Interestingly, a new intense CD band a ...
... bisignate band corresponding to naphthyl π f π* transitions and two minor bands due to the other two lower energy π f π* transitions (Figure 1). CD spectra of 1-4 exhibited these three bands similar to L1-4, but with red-shifts in energy and higher intensities. Interestingly, a new intense CD band a ...
Phosphine-Catalyzed Additions of Nucleophiles and Electrophiles to
... group ability, nucleophilicity, and ease of ylid formation. Increasing leaving group ability can often be correlated with decreasing basicity. Whereas phosphines are less basic than amines (pKa values: HPEt3+ (8.7), HNEt3+ (10.7) in H2O), and therefore better leaving groups, they have strikingly dif ...
... group ability, nucleophilicity, and ease of ylid formation. Increasing leaving group ability can often be correlated with decreasing basicity. Whereas phosphines are less basic than amines (pKa values: HPEt3+ (8.7), HNEt3+ (10.7) in H2O), and therefore better leaving groups, they have strikingly dif ...
Chapter 13 Notes
... Three weak acids are acetic, carbonic and citric. These are found in foods such as vinegar, soft drinks, and citrus fruits. The properties of a base are due to the formation of a hydroxide ion (OH-) when dissolved in water. Some bases contain the hydroxide ion before being dissolved in water but amm ...
... Three weak acids are acetic, carbonic and citric. These are found in foods such as vinegar, soft drinks, and citrus fruits. The properties of a base are due to the formation of a hydroxide ion (OH-) when dissolved in water. Some bases contain the hydroxide ion before being dissolved in water but amm ...
I PUC Chemistry Mock Paper
... 14. How is plaster of paris prepared from gypsum? Give equation 15. Write any two differences between diamond and graphite. 16. Explain Wurtz reaction with an example. 17. How do you convert benzene to hexachlorobenzene ? Give equation 18. Mention any two gases which are responsible for greenhouse e ...
... 14. How is plaster of paris prepared from gypsum? Give equation 15. Write any two differences between diamond and graphite. 16. Explain Wurtz reaction with an example. 17. How do you convert benzene to hexachlorobenzene ? Give equation 18. Mention any two gases which are responsible for greenhouse e ...
Chemistry 11 - Sardis Secondary
... 5. Complete the following calculations. Include all units and don’t forget about sig figs. a) 1.0068g + 2.15g + 8.3g = b) 21.05cm – 12.1cm = c) 1.50 x 10-2 mol = ...
... 5. Complete the following calculations. Include all units and don’t forget about sig figs. a) 1.0068g + 2.15g + 8.3g = b) 21.05cm – 12.1cm = c) 1.50 x 10-2 mol = ...
Chemistry 223 - Department of Chemistry | Oregon State University
... Ala-Gly-Glu-Ala denotes the order in which the amino acids are connected. What is meant by secondary structure? Give an example. Secondary structure is the orientation the primary structure obtains (alpha helix or ...
... Ala-Gly-Glu-Ala denotes the order in which the amino acids are connected. What is meant by secondary structure? Give an example. Secondary structure is the orientation the primary structure obtains (alpha helix or ...
Tech Info - Davis Instruments
... H NMR – A Qualitative Lesson It is easy to identify the prominent peaks in the pre-synthesis 1H NMR spectra of the reactants in the aldol reactions of Figures 5 and 6. Both the aldehyde proton and methyl-ketone protons produce only one resonance line each, thus making them simple to monitor. NMR spe ...
... H NMR – A Qualitative Lesson It is easy to identify the prominent peaks in the pre-synthesis 1H NMR spectra of the reactants in the aldol reactions of Figures 5 and 6. Both the aldehyde proton and methyl-ketone protons produce only one resonance line each, thus making them simple to monitor. NMR spe ...
Slide 1
... - The quantity of product predicted by stoichiometry the theoretical yield - the amount actually obtained the actual yield Percent yield = (actual yield) / (theoretical yield) (100%) ...
... - The quantity of product predicted by stoichiometry the theoretical yield - the amount actually obtained the actual yield Percent yield = (actual yield) / (theoretical yield) (100%) ...
Limitations in Determining Enantiomeric Excess of Alcohols by 31P
... enantiomeric discrimination. Chiral GC and HPLC columns and chiral eluents are not always efficient thus other methods of analysis to assess enantiomeric excess had to be investigated. We were particularly attracted by Feringa’s method2, mainly due to its low cost. Thus compounds 1-4, which were not ...
... enantiomeric discrimination. Chiral GC and HPLC columns and chiral eluents are not always efficient thus other methods of analysis to assess enantiomeric excess had to be investigated. We were particularly attracted by Feringa’s method2, mainly due to its low cost. Thus compounds 1-4, which were not ...
expanding the art of synthesis - Chemistry at Illinois
... of the alcohol is set, the cyclization can produce only a single three-dimensional form of the cyclized product. In contrast, the new route developed by Stang and White relies on an oxidative cyclization strategy in which one of the numerous C–H bonds is selectively oxidized and then reacts with the ...
... of the alcohol is set, the cyclization can produce only a single three-dimensional form of the cyclized product. In contrast, the new route developed by Stang and White relies on an oxidative cyclization strategy in which one of the numerous C–H bonds is selectively oxidized and then reacts with the ...
1 Big-Picture Exam Topics
... need to know for the test next week. You should be able to (i) write the names of these molecules if given structures OR (ii) draw structures of these molecules if given names. ...
... need to know for the test next week. You should be able to (i) write the names of these molecules if given structures OR (ii) draw structures of these molecules if given names. ...
Molecular Models Activity
... provide information concerning the actual arrangement of atoms in the molecule with their correct geometry. In other words, not every molecule is as flat as we draw then on paper when we determine a structural formula. Structural formulas only give some information about the real arrangement of atom ...
... provide information concerning the actual arrangement of atoms in the molecule with their correct geometry. In other words, not every molecule is as flat as we draw then on paper when we determine a structural formula. Structural formulas only give some information about the real arrangement of atom ...
Mechanism
... The Baylis–Hillman adducts and their derivatives have been extensively utilized for the generation of heterocycles and other cyclic frameworks. ...
... The Baylis–Hillman adducts and their derivatives have been extensively utilized for the generation of heterocycles and other cyclic frameworks. ...
Chemical reactions cause chemical changes. They involve the
... a change in substances and a change in energy. However, neither matter nor energy is created or destroyed in a chemical reaction. The fact that matter is not created or destroyed in a chemical reaction is called the law of conservation of mass. In order for chemical reaction equations to show that n ...
... a change in substances and a change in energy. However, neither matter nor energy is created or destroyed in a chemical reaction. The fact that matter is not created or destroyed in a chemical reaction is called the law of conservation of mass. In order for chemical reaction equations to show that n ...
Asymmetric induction
Asymmetric induction (also enantioinduction) in stereochemistry describes the preferential formation in a chemical reaction of one enantiomer or diastereoisomer over the other as a result of the influence of a chiral feature present in the substrate, reagent, catalyst or environment. Asymmetric induction is a key element in asymmetric synthesis.Asymmetric induction was introduced by Hermann Emil Fischer based on his work on carbohydrates. Several types of induction exist.Internal asymmetric induction makes use of a chiral center bound to the reactive center through a covalent bond and remains so during the reaction. The starting material is often derived from chiral pool synthesis. In relayed asymmetric induction the chiral information is introduced in a separate step and removed again in a separate chemical reaction. Special synthons are called chiral auxiliaries. In external asymmetric induction chiral information is introduced in the transition state through a catalyst of chiral ligand. This method of asymmetric synthesis is economically most desirable.