Organic Chemistry Answers

In the following chemical reaction, please identify which molecules are oxidized, reduced, which molecule is being oxidized and reduced, and determine the change in the oxidation state of nitrogen (assume O is -2 and H is +1 oxidation states). Note: NADH = Nicotinamide adenine dinucleotide.

2 NO3 + 5NADH + 7H+ N₂ + 5NAD+ + 6H₂O

1.   Rank the following set of compounds in terms of relative ACIDITY (1 = most, 5 = least):

OH

CH OH

SH

CH2SH

SO3H

2

NO

NO

NO

NO2

NO2

1.   Answer the questions below (a-c) for the follow series of compounds:

SO2NH2

CO CH

COOH

OH

CONH

2

3

2

CH3

CH

CH3

CH3

CH

3

3

A

B

C

D

E

a.       Which compound above is MOST acidic?

b.       Which compound above is LEAST acidic?

c.       Which compound above is MOST susceptible to hydrolysis?

1.Electronic configuration of an element is 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p5. Answer the following questions based on this information.

 a) Explain how you can find out its position in the periodic table (group & period) from the electronic configuration, in two sentences. 

b) What block element is it?

c) Write one property of this element.

describe using the language of the unit, the structure of the polysaccharide,Linear Mannan

Show two different ways to make an epoxide from a trans alkene, one that gives the trans epoxide and one that give the cis epoxide.

Oxidation of a primary alcohol containing an aromatic ring as a substituent to an aldehyde. State what is important about the reaction conditions to stop at the aldehyde.

Rank each of the following groups of substrates in order of decreasing S_N2 reactivity.

a.        CH₃CH₂CH₂Cl, CH₃Cl, (CH₃CH₂)₂CHCl

b.        (CH₃)₂CHCH₂CH₂Br, (CH₃)₂CHCH₂Br, (CH₃)₂CHBr

c.         CH₃CH₂Cl, CH₃CH₂I, (CH₃)₂CHCl, CH₃CH₂Br

1. (a) Use the Arrhenius equation to calculate the ratio of the rate constants k for the hydrogen abstraction in methane with a chlorine atom and with a bromine atom at 25^oC. Assume the A values for the two reactions are the same, and use E_a = 4 kcal/mol for chlorination and E_a = 19 kcal/mol for bromination.

(b) The high selectivity of radical bromination towards secondary and tertiary C-H bonds disappears if equimolar mixture of Br₂ and Cl₂ are used. The selectivity of the bromination between alkanes and the mixture of Br₂ and Cl₂ is very similar to the selectivity of chlorination. Explain this phenomenon.

configurational isomers