Explore BrainMass

Lewis Structure: CN- Anion

This content was STOLEN from BrainMass.com - View the original, and get the already-completed solution here!

(a) Draw the best Lewis dot structure for the anion CN- and indicate on the basis of formal charges whether you would expect the extra electron to be on carbon or nitrogen. Does this agree with the prediction based on electronegativity? Explain.

(b) Given the atomic energy levels for the carbon and nitrogen atoms below, draw a molecular orbital diagram for CN- anion labeling all the bonding and antibonding molecular orbitals appropriately. Fill in the electrons in the appropriate orbitals.
2p __ __ __
2s __
1s __


__ __ __ 2p
__ 2s
__ 1s


(c) Do you expect CN- anion to be affected by a magnetic field? Explain your reasoning.

(d) What is the bond order of the anion CN- ?

(e) What is the bond order of the neutral CN ?

© BrainMass Inc. brainmass.com October 24, 2018, 6:04 pm ad1c9bdddf

Solution Preview

a) formal charge of C: 4 - 5 = -1
formal charge of N: 4 - 4 = 0
if the electron is place on N, the formal charge of N will become -1. so ...

Solution Summary

This solution includes explanation, a Lewis dot structure for (a) a complete drawing of (b) and answers to (c) and (d).

See Also This Related BrainMass Solution

Organic Compounds, Synthesis of 2-hexanone, Grignard reagent, Aldol condensation reaction ...

Please see the attached file for the full problems.

1. Name each of the following compounds.

2. Write a structural formula for each of the following compounds.

a. benzyl methyl ketone
b. 2-pentenal
c. 2-chloro-3-hexanone
d. 2,3-dimethylpentanal

3. Write an equation for the synthesis of 2-hexanone by
a. oxidation of an alcohol
b. hydration of an alkyne

4. Write an equation for the reaction of propanal with each of the following reagents, and name the organic product.
a. cyanide ion
b. sodium borohydride
c. phenylmagnesium bromide, then H3O+

5. Using a Grignard reagent and the appropriate aldehyde or ketone, show how each of the following can be prepared.
a. 2-phenyl-2-butanol
b. 2-hexanol
c. 1-pentene-3-ol

6. Complete the equation for the reaction of

7. Give the structure of each product.

8. Write out the steps for the aldol condensation reaction between the enolate anion of propanal with pentanal.

9. Using Figure 16.1 on page 462 of your textbook, draw the Fisher projection formulas for the following:
a. L-ribose
b. L-arabinose
c. L-glucose
d. L-talose

10. Using Figure 16.1 on page 462 of your textbook, draw the Fisher projection formulas for the following and then convert them to three-dimensional representations.
a. L-threose
b. L-erythrose

View Full Posting Details