Compounds line-angle formula

Draw a line-angle formula for each compound in Problem 1-26. 

Do the line-angle formulas in each pair represent the same compound or constitutional isomers ... 

PRACTICE EXAMPLE B Write the line-angle formula for the organic compounds (a) propene (b) heptan-l-ol ... 

Formulas for hydrocarbon compounds may be expressed with a type of shorthand notation. For example, propane has a shorthand formula CH3-CH2-CH3 that is more accurately called a condensed structural formula. When using the shorthand formula, it is important to remember that the real compound and the three carbons are not in a straight line rather, they are connected at a 110-degree angle. 

Suppose we could look at butane, C4H10, as it rotates. Sometimes the —CH3 groups line up in front of each other, and at other times they are opposite each other. As the —CH3 groups turn around the single bond, the carbon chain in the condensed stmctural formulas may appear at different angles. For example, butane can be drawn using a variety of two-dimensional condensed structural formulas as shown in Table 11.3. All these condensed structural formulas represent the same compound with four carbon atoms. 

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