Nucleophilic attack Study guides, Class notes & Summaries

13.3 Elimination Reactions in HalogenoalkanesHow do halogenoalkanes typically react? By nucleophilic substitution How do halogenoalkanes react under different conditions? By elimination How does elimination reactions occur? A hydrogen halide is eliminated from the molecule, leaving a double bond in its place so that an alkene is formed What is the OH- ion from aqueous sodium or potassium hydroxide? A nucleophile and its lone pair will attack a halogenoalkane at C

TAMU CHEM 238 FINAL EXAM QUESTIONS AND ANSWERS RATED A+ 1. Reaction of ethyl magnesium bromide with water will generate? a. ethanol b. ethane c. butane d. ethyl magnesium hydroxide e. a peroxide b 2. Under conditions of thermodynamic control, product distribution is governed by: a. the relative stabilities of the products b. the relative energies of the transition states leading to the products c. the rate at which each product is formed d. a and b e. b and c a 3. Which of the followi...

13.3 Elimination Reactions in Halogenoalkanes Questions with complete solution 2023/2024How do halogenoalkanes typically react? - correct answer By nucleophilic substitution How do halogenoalkanes react under different conditions? - correct answer By elimination How does elimination reactions occur? - correct answer A hydrogen halide is eliminated from the molecule, leaving a double bond in its place so that an alkene is formed What is the OH- ion from aqueous sodium or potassium hydrox...

How do halogenoalkanes typically react? - correct answer By nucleophilic substitution How do halogenoalkanes react under different conditions? - correct answer By elimination How does elimination reactions occur? - correct answer A hydrogen halide is eliminated from the molecule, leaving a double bond in its place so that an alkene is formed What is the OH- ion from aqueous sodium or potassium hydroxide? - correct answer A nucleophile and its lone pair will attack a halogenoalkane at C

SN1 Reaction - ANSWER- Unimolecular nucleophilic substitution - 2 steps - Starting with enantiomerically pure product tends to result in some degree of racemization - Retention AND inversion at stereocenter (R and S) - 1 nucleophile is replaced by another nucleophile - Carbocation INTERMEDIATE forms - Rate is dependent only on substrate concentration 1. LG leaves, forming a carbocation 2. Nucleophile attacks the carbocation, forming the product SN2 Reaction - ANSWER- Bimolecular nuc...

AQA A-Level CHEMISTRY 7405/2 Paper 2 Organic and Physical Chemistry Mark scheme June 2022. Brown colour removed Goes colourless Allow (orange) brown to colourless Allow purple to colourless 1 (AO3) Question Answers Additional Comments/Guidelines Mark 01.5 As T increases rate (1/t ) increases OR time for completion decreases Exponentially OR By a greater/ increasing factor Many more particles have E ≥ Ea Or rate increases more and more as temp increases i.e. description of exponen...

1 CHM 219 MODULE 4 EXAM | QUESTIONS & ANSWERS (VERIFIED) | LATEST UPDATE | GRADED A+ Organohalides Correct Answer: Organic molecules contains Halogen atoms. Ex. Algae, Mollusk, sponges, can be industrially used - solvents, insecticides, herbicides, cleaning fluids, fire retardants, refrigerants. Can also be used as inhaled anesthetic. More important in organic chemistry because of theur reactivity. Two of the most important reaction types typical of organic Halides are.... Corr...

What is an electrophile? correct answer: compound or ion that are poor in electron density- LOVES AVAILABLE ELECTRONS Same as Lewis Acid What is a nucleophile? correct answer: is an ion or a compound that is capable of donating a pair of electrons-- THEY WOULD LOVE TO ATTACK A NUCLEUS These are the exact same a Lewis Base THESE SHARE ELECTRON DENSITY Examples of Nucleophiles correct answer: I-, Cl-, Br-, HS-, RO-, HO-,NH2- Nucleophilic Attack correct answer: shows the nuc...

How is malonyl-CoA formed? correct answer: Carboxylation of acetyl-CoA to form malonyl-CoA requires two steps (both use acetyl-CoA carboxylase). 1. The enzyme, complexed with biotin, acquires CO2 from HCO3 - a. Requires 1 ATP 2. The carbon is transferred to acetyl-CoA to form malonyl-CoA The overall reaction is irreversible and commits the molecule to fatty acid synthesis. Phosphate is added to HCO3 - and then removed so that biotin-carboxylase can grab the carbon. The carbon is donated to...

Chemical properties of Aldehydes and Ketones Reactions common to both Aldehydes and Ketones The difference between an Aldehyde and a Ketone is the position of the C=O (Carbonyl group). Aldehyde – always on a carbon at the end of the chain Ketone – Always on a carbon at middle carbon of the chain 1. BOTH Aldehydes and Ketones can be reduced Aldehyde reduced to Primary Alcohol Reducing agent = Sodium tetrahydroborate III (NaBH4) Ketone reduced to Secondary Alcohol ...