2 CHAPTER 1 BOND-LINE DRAWINGS Double bonds are shown with two lines,and triple bonds are shown with three lines: When drawing triple bonds,be sure to draw them in a straight line rather than zigzag. because triple bonds are linear(there will be more about this in the chapter on geom- etry).This can be quite confusing at first,because it can get hard to see just how many carbon atoms are in a triple bond,so let's make it clear: so this compound has is the same as 6 carbon atoms Don't let triple bonds confuse you.The two carbon atoms of the tripe bond and the two carbon connected to them are drawn in a straight line.All other bonds are drawn as a zigzag: HHHH H-C-C-C-C-H is drawn like this: HHHH BUT H H-C-C=C-C-H is drawn like this: H EXERCISE 1.1 Count the number of carbon atoms in each of the following drawings: Answer The first compound has six carbon atoms,and the second compound has five carbon atoms: PROBLEMS Count the number of carbon atoms in each of the following drawingsDouble bonds are shown with two lines, and triple bonds are shown with three lines: When drawing triple bonds, be sure to draw them in a straight line rather than zigzag, because triple bonds are linear (there will be more about this in the chapter on geom￾etry). This can be quite confusing at first, because it can get hard to see just how many carbon atoms are in a triple bond, so let’s make it clear: Don’t let triple bonds confuse you. The two carbon atoms of the triple bond and the two carbons connected to them are drawn in a straight line. All other bonds are drawn as a zigzag: BUT EXERCISE 1.1 Count the number of carbon atoms in each of the following drawings: Answer The first compound has six carbon atoms, and the second compound has five carbon atoms: PROBLEMS Count the number of carbon atoms in each of the following drawings. 1 O 2 3 4 5 6 1 2 3 4 5 O C C C C H H H H H H is drawn like this: C C C C H H H H H H H H H H is drawn like this: C C is the same as so this compound has 6 carbon atoms 2 CHAPTER 1 BOND-LINE DRAWINGS 6753_Klein_01.qxd 5/1/07 5:03 PM Page 2