1. I have a compound that is 1-cyclopentene and a single bond of ch2br is attach

Question

1.  I have a compound that is 1-cyclopentene and a single bond of ch2br is attached to the double bond of the ring (I'm not quite sure of the IUPAC naming of the compound).  I'm planning on using CH3OH in the reaction.  What product(s) can I expect from doing this?

2.  What intermediate can be preferentially formed during the reaction of 1,3 butadiene with HCl?

               +                              +                                                                        +

a) H3C-CH-CH2-CH3   b) CH2-CH2-CH(double bond)CH2  c)H3C-CH-CH(double bond)CH2

                                       +

d) H2C(double bond)C-CH(double bond)CH2   e) None of these

3.  Which diene would you expect to react most rapidly with maleic anhydride?

a) 1,3 butadiene  b) 1,3 cyclobutadiene  c)  2,4-dimethyl-1,3-butadiene.  d) 2,4-dimethyl-1,3-cyclopentene  e) 3,4-hexadiene with carbonyl groups attached to c-2 and c-5.

4.  Which set of conditions does not result in allylic halogenation of an alkene?

a) Cl2 at 400 degrees celsius  b) Cl2 in CCl4 at 25 degrees celsius  c) Cl2, ROOR, hv  d) Br2 at low concentration in CCl4  e) N-bromosuccinimide in CCl4, ROOR  

Explanation / Answer

1. Products will nucleophile substituted compound. I mean bromine will replace by nucelophile.

2. e none of these, because H will attached via Markovnikoff rule and then Cl will add other end.

3. a. because (2 +4) cycloaddition gives six membered stable compound.

4. b becase halogenation require driving force either by sunlight or heating.

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