ORGANIC CHEMISTRY II
EXAM I
SPRING 2004

Given below is the lecture and lab schedule for the first exam.Be aware that due to variations in the pace at which we cover material our actual schedule may vary.I have indicated below which sections from each chapter we will cover, although the sections may not be covered in the order listed.Note that some material listed for Chapter 9 we covered last semester; you may wish to review it but we won’t be going over it in class.Sections not listed may safely be ignored. I would highly recommend the following approach:

·read all of the indicated material for a particular chapter before we cover it in class

·after each class review the relevant sections in the book


 

Week of:

Mon.

Weds.

Fri.

Lab:

Report:

Due:

Jan. 19
no class

Ch. 9
Ch. 9
No lab.
Jan. 26
Ch. 10

Ch. 10
Ch. 10
Start Project 5.1
Feb. 2
Ch. 10

Ch. 10
Ch. 10
Finish Project 5.1; store product.
Results section;

discuss results in recitation Feb. 6

in lab w/o Feb. 9
Feb. 9
Ch. 11

Ch. 11
Ch. 11
Free-Radical Bromination of Hydrocarbons (handout)
yellow pages

discuss results in recitation Feb. 13

end of lab
Feb. 16
Ch. 12

Ch. 12
Ch. 12
Nitration of Alkylbenzenes (handout)

Exam I, Chapters 9, 10, 11: Tuesday Feb. 17, 7:00 PM, Trumbower 130

Feb. 23
Ch. 12

Ch. 12
Ch. 12
#22 Alkylation of 1,4-Dimethoxybenzene

 


 
369
Ch. 9: Electrophilic Addition Reactions of Alkenes and Alkynes
369
The number of sites of unsaturation provides information about the presence of p bonds and rings
370
The reactions of cyclohexene illustrate the fundamental processes of electrophilic addition
372
Addition of HX occurs via a carbocation intermediate generated by the protonation of a p bond
373
Addition of water occurs in the presence of a strong acid that has a nonnucleophilic conjugate base
374
The addition of chlorine or bromine to a p bond occurs by another type of cationic intermediate, a halonium ion
378
Oxymercuration provides an example in which a metal ion is the electrophile
380
Additions to acyclic alkenes occur by the same processes as those observed for cyclohexene
384
Reactions of methylcyclohexene illustrate the regiochemistry associated with electrophilic addition processes
384
Addition of HX occurs to give the product with the proton attached to the less highly substituted carbon – Markovnikov’s rule
387
Addition of bromine and chlorine occurs in a Markovnikov fashion when water is the solvent
390
Oxymercuration further illustrates the generality of Markovnikov addition, in this instance with a metal ion as the electrophile
391
Reactions of an electrophilic reagent with acyclic alkenes also occurs by Markovnikov addition
393
A terminal alkyne reacts with electrophiles in sequential reactions by Markovnikov addition
394
The Markovnikov addition of water to an alkyne is catalyzed by mercury (II) ion with sulfuric acid and produces a ketone
396
Electrophilic addition to an internal alkyne gives a mixture of products unless the addend or alkyne is symmetric
397
A diene undergoes 1,2- and 1,4-addition processes, illustrating the concepts of kinetic versus thermodynamic control
399
Carbocations can add to alkenes to form dimers, illustrating the Markovnikov addition of the electrophile R+ to a double bond
401
Alkenes dimerize in biological systems by electrophilic addition to create new carbon-carbon bonds
403
Polymerization occurs via carbocation addition to an alkene in a Markovnikov fashion
405
Intramolecular addition of a carbocation to a p bond produces a ring
407
Steroids are made by successive cyclization reactions starting from squalene
409
Summary
415
Ch. 10: Concerted Addition Reactions of Alkenes and Alkynes
416
Hydrogen adds stereospecifically to carbon-carbon double or triple bonds in the presence of a metal catalyst
419
Hydroboration provides a useful way to functionalize carbon-carbon double and triple bonds
421
Hydroboration is a stereospecific and regioselective reaction occurring via a four-membered ring transition state
424
Organoboranes react with certain nucleophiles to yield functionalized alkanes
425
Hydroperoxide ion converts an organoborane to an alcohol
431
A cycloaddition process called the Diels-Alder reaction is used to prepare six-membered rings
433
Molecular orbitals of a diene and dienophile must have the proper symmetry to react
438
The regio- and stereoselectivity of the Diels-Alder reaction is dependent upon the substitution pattern of the diene and dienophile
440
Ozonolysis of an alkene cleaves the carbon-carbon p bond, yielding carbonyl-containing compounds
442
Potassium permanganate and osmium tetroxide react with alkenes to form metalate esters, also by a formal [4+2] cycloaddition process
447
An epoxide is formed by the reaction between a peracid and an alkene
454
Summary
465
Ch. 11: Free Radicals: Substitution and Addition Reactions
466
Chlorination of methane occurs via a radical chain process
468
Bond dissociation energies can be used to calculate or estimate free energy changes of radical reactions
469
Chlorination of alkanes leads to mixtures of isomeric products
473
Bromination of an alkane is more selective than chlorination
474
N-bromosuccinimide provides a low concentration of bromine for the free-radical reactions of allylic and benzylic substrates
477
Allylic oxidation is an important biological process for generating potent physiologically active compounds
482
Metal ions are used in several ways to generate radicals in biological systems
485
An alkyne can be reduced by an alkali metal in liquid ammonia
486
Hydrogen bromide adds to alkenes via a radical process with apparent anti-Markovnikov regiochemistry
489
Addition of an alkyl radical to an alkene provides a general method for the preparation of polymers
491
Copolymers are formed by the addition of radicals to more than one monomer
492
Branched polymers result from hydrogen-atom transfer processes
499
The cyclic pathway of arachidonic acid metabolism produces prostaglandins via a radical ring-forming process
501
A tandem cyclization can occur when there is more than one point of unsaturation
503
Enediynes are potent anticancer drugs that react by forming a diradical that subsequently cleaves DNA
506
Summary