The chemical structure of ethanol (CH,CH,OH) is shown below. Highlight each atom that is in a hydroxy group. H H. H–C .C H

1. Name the following molecules. a. b. Ph u ↓ Ph C. d. O H CO

Change 1,2-ethenediol into 1,2 ethynediol (HOCCOH) by removing one hydrogen atom from each carbon atom and replacing with a triple bond between the carbon atoms. Be sure to add the third rod to represent the triple bond. Draw a Lewis structure for 1,2-ethynediol. A. Identify the electron-pair and molecular geometry around each carbon and oxygen atom. B. What are the bond angles for C-C-O? For C-O-H? C. Can the molecule interconvert or “flip” between different structures in which the –OH group on the two carbon atoms occupy different orientations with respect to each other? If so, how does this happen? If not, why?

The following represents the two different ways that atoms can be connected for compounds that have the same molecular formula C2H6O. What do we call these two different ways of showing how the atoms are connected?

Compare the following compounds based on the property given.

What is the name of this aleohol! OH F F

Change the bond between the two carbon atoms in each molecule to a double or triple bond as needed to complete the structure. If the bond should remain a single bond, then you do not need to do anything to the bond. Do not change any other bonds in the molecules. Molecule A Molecule B Select Draw Rings More Erase Select Draw Rings More Erase // H. H. H. H. H. H. 1. H - H. H. H. H. H.

Draw the reaction

A hydrocarbon contains only the elements O carbon, hydrogen, and nitrogen. carbon and hydrogen. O carbon, hydrogen, and oxygen. O carbon and oxygen.

Consider an organic molecule with the molecular formula C13H10O. a. Propose a chemically correct structure for this molecule that contains a ketone. b. Propose a chemically correct structure for this molecule that contains a functional group other than a ketone