91Ó°ÊÓ

Which of the following compounds can be an alkane? (a) \(\mathrm{C}_{2} \mathrm{H}_{4}\) (b) \(\mathrm{C}_{5} \mathrm{H}_{12}\) (c) \(\mathrm{C}_{14} \mathrm{H}_{30}\) (d) \(\mathrm{C}_{7} \mathrm{H}_{8}\)

Which of the following compounds can be a cyclo alkane? (a) \(\mathrm{C}_{3} \mathrm{H}_{5}\) (b) \(\mathrm{C}_{5} \mathrm{H}_{10}\) (c) \(\mathrm{C}_{14} \mathrm{H}_{30}\) (d) \(\mathrm{C}_{8} \mathrm{H}_{8}\)

One of the structural isomers with the formula \(\mathrm{C}_{3} \mathrm{H}_{20}\) has the name 3 -ethyl- 2 -methylhexane. Draw its structure. Draw and name another structural isomer of \(\mathrm{C}_{9} \mathrm{H}_{20}\) in which there is a fivecarbon chain.

Isooctane, 2,2,4 -trimethylpentane, is one of the possible structural isomers with the formula \(\mathrm{C}_{8} \mathrm{H}_{18} .\) Draw the structure of this isomer, and draw and name structures of two other isomers of \(\mathrm{C}_{8} \mathrm{H}_{18}\) in which the longest carbon chain is five atoms.

Draw the structure of each of the following compounds: (a) 2,3 -dimethylhexane (b) 2,3 -dimethyloctane (c) 3 -ethylheptane (d) 3-ethyl-2-methylhexane

Draw structures for the following compounds. (a) 3 -ethylpentane (b) 2,3 -dimethylpentane (c) 2,4 -dimethylpentane (d) 2,2 -dimethylpentane

Draw Lewis structures and name all possible alkanes that have a seven-carbon chain with one methyl substituent group. Which of these isomers has a chiral carbon center?

Four (of six possible) dimethylhexanes are named below. Draw the structures of each, and determine which of these isomers has a chiral carbon center. (a) 2,2 -dimethylhexane (b) 2,3 -dimethylhexane (c) 2,4 -dimethylhexane (d) 2,5 -dimethylhexane

Draw the structure of the chair form of cyclohexane. Identify the axial and equatorial hydrogen atoms in this drawing.

Draw a structure for cycloheptane. Is the sevenmember ring planar? Explain your answer.