the diene used was cyclopentadiene (a cyclic diene). Due to the fact that more than one stereoisomer may form‚ it is important to know that the major product will be the one with the transition state for the endo stereochemistry while the minor product will be for the exo stereochemistry. The reason for this is because the reaction favors the product that involves the maximum overlap of pi electrons in its transition state‚ which in this case‚ is the endo isomer. To ease the concerns of orbital overlap
Premium Chemistry Distillation
compound. Use the numbering scheme shown in te dagram: (1R‚ 2R)-1‚2-Dimethylcyclobutane (5 pts) How many unique monochloro compounds would result from free radical chlorination of this molecule? Be sure to consider absolute stereochemistry when formulating your answer. FIVE (10 pts) Of all the dichloro derivatives which could form‚ write the structure of any meso compounds below. If none would form‚ write the word “NONE” below. [pic]
Premium
Curie‚ Joseph Achille Le Bel‚ and many others made important discoveries that contributed to chemistry. Joseph Achille Le Bel was a french chemist born on January 21‚ 1847 and grew up in Pechelbronn‚ France. He is best known for his work in stereochemistry‚ and the rapid development of organic chemistry. He was the nephew of agricultural chemist Boussingault‚ and worked alongside his uncle with petroleum markings in Pechelbronn. He eventually made
Premium Chemistry Alchemy Science
examples (b) Stereochemical aspects and the Woodward and Hoffmann rules 3) Cycloaddition Reactions (a) Definition and examples (b) Stereochemical aspects and the Woodward and Hoffmann rules (c) The Diels-Alder reaction (i) Stereospecific syn-addition (ii) Diene conformation (iii) Exo/endo stereoselectivity 4) Sigmatropic Rearrangements (a) Definition‚ examples and numbering NOTES 1) General Principles – Book reading is highly recommended for this topic (a) Reaction classes
Premium Organic reaction Chemical reaction
Relative Reactivity of Alkyl Halides Introduction Nucleophilic substitution of alkyl halides can proceed by two different mechanisms – the SN2 and the SN1. The purpose of the experiment was to identify the effects that the alkyl group and the halide-leaving group have on the rates of SN1 reactions‚ and the effect that the solvent has on the rates of SN1 and SN2 reactions. The SN1 mechanism is a two-step nucleophilic substitution‚ or unimolecular displacement. In the first step of the mechanism
Premium Solvent Ethanol
Ozone Layer Depletion [ Language & Communication Skills ] Contents Abstract | 1 | Introduction | 2 | Findings: Factor of ozone depletion | 3 | Effect of ozone depletion | 4 | Solution of ozone layer | 5-6 | Conclusion | 7 | Recommendation | 8 | References | 9-10 | Appendices | 11-13 | Bibliography | 14 | Abstract Ozone is concentrated in the ozone layer ‚ which is located in the stratosphere. It plays an important role to protect humans and
Premium Ozone depletion
electrode) → think anOde (O2 in the electrolysis of water xp) Redox reactions: Reactions involving the transfer of electrons e.g. burning‚ rusting‚ photosynthesis‚ respiration and the browning of apples. happens in three types of reactions: 1. addition of oxygen 2. removal of hydrogen 3. increase in valency (how easily an atom can combine with other chemical species) Reduction → the gain of electrons → always happens at cathode (negative electrode) → think catHode (H2 produced in the electrolysis
Premium Chlorine Hydrogen Electrochemistry
DEPARTMENT OF PURE AND APPLIED CHEMISTRY Visayas State University‚ Baybay City‚ Leyte CHEM31a – BIOCHEMISTRY Laboratory Report Name: Alyssa Diane Marie L. Baljon Date Performed: May 11‚ 2015 Course & Year: BSChem 2 Date Submitted: May 18‚ 2015 Lab Schedule: M-F 7:00-10:00 Score: Group No. 4 Experiment No. 4 Lipids Objectives Observe some physical and chemical properties of lipids Distinguish between saturated and unsaturated fats. Observe saponification of triacylglycerol in the preparation
Premium Fatty acid
Experiment 1: Isolation of Casein from Milk * pH of milk – 6.6 * milk = 87.1% water‚ 4.9 % CHO 3.9 %‚ fats‚ 0.7% minerals Experiment 2: Protein Hydrolysis and Characterization | Reagents | Principle | Test for | Positive Result | Negative Result | Biuret | CuSO4‚ NaOH | Complexation of Cu+2 with amide N atoms | Polypeptide bonds | Violet/purple solution | Blue color solution | Sakaguchi | 10% NaOH‚ 0.02% α-naphtol solution‚ 2% NaOBr | arginine condenses with α-naphtol and NaOH
Premium Acetic acid Iodine Ester
experiment all take place by way of an SN1 reaction. All of the reactions proceed with the same mechanism. SN1 reactions occur under solvolysis conditions‚ where the solvent serves as the nucleophile. The slow‚ rate-determining step occurs as the bromine leaves the 2-bromo-2-methylpropane‚ forming a 3◦ carbocation. The water‚ which acts as the nucleophile and the solvent‚ attaches to the carbocation at the central carbon. Another water molecule then removes a
Premium Solvent Alcohol