Savasnah State University Department of Chemistry and Forensic Science CHEM 2511

Question

Savasnah State University Department of Chemistry and Forensic Science CHEM 2511, Organic Chemistry 11 Spring 2018 Test III Name: Date: April 12, 2018 I. Which of the follow ing compounds is (are) classified as ethers? A. I B. II& IV C. I D.1&I11; E all of these 2. What is the common name for CH CH CH OCH CH-CH, A dibutyl ether B. 1-proposypropane C. I-propoxyhexane D. dipropyl ether E one of these 3. What is the common name for the following compound? A. I-butoxybutane D. a-butyl isopropyl ether B. sec-butyl isopropyl ether E. none of these C. sec-butyl t-butyl ether 4. What is the IUPAC name for CHiCH OCH CH CH CHOCH CH? A. 1,4-ethoxyoctane D. 1.2-diethoxyhexane B. diethoxy butyl ether C. 1.2-diethoxymethane E. 1,4-diethoxybutane Which one of the following compounds will have the highest boiling point? B. CHiCH CH CH OH 5. A. CH CH CH:CH:CH C.CHCHCH OCHs 6. What type of molecular interactions do ethers have? A dipole-dipole interactions D. London dispersion forcesE.hydrogen bonding B. ion-dipole interactions C. ion-ion interactions 7. Which one of the following reactions would prodace t-butyl methyl ether in high yield? B. -butanol + methanol in presence of H,SO, at 140°c A. t-butyl chloride + sodium methoxide C. a-butyl bromide+ bromomethane in the presence of NaOH D, sodium r-butoxide + bromomethane 8. Predict the product for the following reaction. 3-methyl-2-entene 1. Hg(OAch, CH,CH-OH A. 3-methyl-3-pentanol D. 2-ethoxy-3-methylpentane B. 3-ethoxy-3-methylpentane E. 1-ethoxy-3-methylpentane C. 3-methyl-2-pentanol

Explanation / Answer

1)

Ethers are the compounds in which two alkyl groups or one alkyl group and one aryl group are bonded to oxygen atoms.

The general formula of ethers is R-O-R'

R is alkyl group and R' is alkyl or aryl.

Compound I is an cyclic ether.

Compound II is an ether becuase alkyl and aryl group is bonded to oxygen atom.

Compound III is an ether becuase two alkyl (ethyl ) groups are bonded to oxygen atom.

Compound IV is also an ether becuase two alkyl groups (vinyl and ethyl) are bonded to oxygen atom.

So, the four compounds are ethers.

Answer: E. all of these.

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