Key Concepts—Alkanes

A staggered conformation is lower in energy than an eclipsed conformation. An anti conformation is lower in energy than a gauche conformation. 

37 For each alkane (a) classify each carbon atom as 1°, 2°, 3°, or 4° (b) classify each hydrogen atom as 1°, 2°, or 3° 

39 Draw the structure of all compounds that fit the following descriptions. 

41 Give the structure and lUPAC name for each of the nine isomers having molecular formula C9H20 that contains seven carbons in the longest chain and two methyl groups as substituents. 

42 Draw the structure corresponding to each lUPAC name. 

---