Cyclobutane has 109 degree bond angles like all alkanes. A student gave a molecu

Question

Cyclobutane has 109 degree bond angles like all alkanes. A student gave a molecule the following name: 2-ethyl-3-methyl-5-isopropylhexane However, his TA pointed out that, although the molecule could be correctly drawn from this name, the name violates the systematic rules. What is the correct (systematic) name of the molecule? a) 3,4-dimethyl-6-isopropylheptane b) 2-isoproopyl-4,5-dimethylheptane c) 3,4,6,7-tetramethyloctane d) 1,2-diethyl-3,6,7-trimethylheptane e) 2,3,5,6-tetramethyloctane How many isomers are there with the formula C_3H_5Br? Include both structural and geometric isomers. a) 2 b) 3 c) 4 d) 5 e) 6 In lecture, the professor named a molecule 2-ethyl-4-tertiary-butylpentane. An alert student pointed out that although the correct structure could be drawn, the name did not follow systematic rules. What is the correct systematic name for the molecule? a) 2-t-butyl-5-methylhexane b) 2-ethyl-4,5,5-trimethylhexane c) 3,5,6,6-tetramethylheptane d) 2,2,3,5-tetramethylheptane e) undecane Which is a possible product of the chlorination of butane in the presence of light? a) C_4 H_9Cl b) C_4 H_8Cl c) C_4H_10 Cl_2 d) C_4 H_6Cl_2 e) C_4 H_9Cl_2

Explanation / Answer

Ans 20 . e . 2,3,5,6-tetramethyloctane

To name the organic compound systematically , identify the longest pareny hydrocarbon chain first , which is 8 membered here , hence the name , octane .

Then name the substituent groups according to their positions in the carbon chain.

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