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4. Build a model of the 1,2-ethanediol molecule. a. Identify the electron-pair and molecular geometry around...

4. Build a model of the 1,2-ethanediol molecule.

a. Identify the electron-pair and molecular geometry around each carbon and oxygen atom.










b. What are the bond angles for H-C-H? For H-C-C? For C-C-O? For C-O-H?






c. Draw two different structures of the molecule in which the –OH groups on the two carbon atoms have different orientations with respect to each other.












Which structure is more stable? Explain your reasoning (Hint: What factors contribute to the stability of a structure?).













Can the molecule interconvert or “flip” between the two structures? If so, how does this happen? If not, why?


Change 1,2-ethanediol into 1,2 ethenediol (HOCHCHOH) by removing one hydrogen atom from each carbon atom and replacing with a double bond between the carbon atoms. Be sure to add the second rod to represent the double bond.

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