Organic Chemistry Answers

The acid G contains two carboxylic acid groups and has the formula.
HO2CCxHyCO2H
where X and y are whole numbers.
Deduce the value of X and y.

When 25.0 mL of 0.25 mol/L LiOH and 25.0 mL of 0.25 mol/L HCl are mixed together, the temperature warms 15.8o C. What is the molar enthalpy of neutralization for LiOH? (3 marks)

Draw the stuctures of the following compounds

(1) 3-methylbutene

(2) 2-bromopropane

(3) 2,3-dimethylbut-2-ene

(4) methyl ketone

(5) cyclohexyl methyl ketone

The pH of a 0,40 M formic acid, HCOOH (aq) solution is 2.08. Calculate the percentage of HCOOH molecules that are dissociated.


Select one:
a. 1,1 %
b. 11,2 %
c. 2,1 %
d. 0,89 %

a) When HBr adds across the double bond of 1,2-dimethylcyclopentene, the product is a mixture of the cis and trans isomers. Show why this addition is not stereospecific. (b) When 1,2-dimethylcyclopentene undergoes hydroboration–oxidation, one diastereomer of the product predominates. Show why this addition is stereospecific, and predict the stereochemistry of the major product.

Show how you would accomplish the following transformations.
1_methylcycloheptanol---->2_methylcycloheptanol

(a) When (Z)-3-methylhex-3-ene undergoes hydroboration–oxidation, two isomeric products are formed. Give their structures, and label each asymmetric carbon atom as (R) or (S). What is the relationship between these isomers? (b) Repeat part (a) for (E)-3-methylhex-3-ene. What is the relationship between the products formed from (Z)-3-methylhex-3-ene and those formed from (E)-3-methylhex-3-ene?

Show how you would accomplish the following synthetic conversions.
(a) but_1_ene-->butan_1_ol
(b) but_1_ene--->butan_2_ol
(c) 2_bromo_2,4_dimethylpentane-->2,4_dimethylpentan_3_ol