Chem 1215 Unit 6 Review Problems

1. Draw a valid Lewis structure for BrF₃. What is the electron domain geometry around Br? Which hybrid orbitals are used by the central atom? Draw 3-d structures showing the electron domain and molecular geometries for BrF₃.

2. Draw three resonance structures for the SCN^- ion. Calculate the formal charge for each atom in the three structures. Which resonance structures is the best representation of this ion? What is the electron domain geometry around the central atom? What hybrid orbitals are used by the central atom?

3. Draw a Lewis structure for an organic compound with the condensed structural formula, CH₂CHCN. Identify the hybrid orbitals used by each atom other than H. What is the electron domain geometry around each carbon atom? Draw a 3-dimensional structure for the compound. What functional group(s) is/are present?

4. Complete the MO diagram for NO. Calculate the bond order. Does the molecule exist? Predict whether the molecule (if it exists) would be paramagnetic or diamagnetic.

s^*_2p _____

p^*_2p _____ _____

p_2p _____ _____

s_2p _____

s^*_2s _____

s_2s _____

5. Name the following compounds:

6. Draw the condensed structural formula for each of the following organic compounds:

a. 5-bromo-2,2-dimethly-4-propyloctane

b. trans-2,3,4-trimethyl-3-hexene

c. cis-4,5-dichloro2-heptene

d. 4-ethyl-2,3-dimethyl-3-hexanol

e. 1-bromo-4,4-dimethyl-2-nonyne

f. 3-ethyl-3-pentanol

g. ethanol

h. acetic acid

7. Circle and name each functional group that is present in the following compounds. (Note: These structures are written as line angle drawings. A carbon and the appropriate number of hydrogens (to give carbon a total of 4 bonds) are found wherever two lines meet or at the end of a line (unless some other atom is attached at the end).