Organic Nomenclature

Quick reference — Organic nomenclature

1. Write the molecular formula of ethane. (1 points)

Feedback: Alkanes have general formula CnH2n+2; for n=2: C2H6.

2. Select the connectivity (structure) of 2-methylpropane. (1 points)

CH3-CH(CH3)-CH3 CH3-CH2-CH2-CH3 CH3-C(CH3)2-H CH3-CH2-CH(CH3)2

Feedback: 2-methylpropane (isobutane): methyl substituent on carbon 2.

3. What type of isomerism does CH3-CH=CH-CH3 exhibit? (1 points)

Cis/trans Z/E Optical Functional

Feedback: This alkene exhibits cis/trans stereoisomerism.

4. Indicate the configuration (R or S) of the chiral center in CH3-CH(Br)(Cl)-H. (1 points)

Feedback: By CIP rules: Br > Cl > CH3 > H, the configuration is R.

5. What is the general formula for alkynes? (1 points)

Feedback: Alkynes have general formula CnH2n-2.

6. Which functional group is present in HO-CH2-CH2-OH? (1 points)

Alcohol Ether Carboxylic acid Aldehyde

Feedback: The -OH groups indicate alcohols (a diol).

7. What is the general formula for cycloalkanes? (1 points)

Feedback: Cycloalkanes have general formula CnH2n.

8. What is the name of the substituent CH3-? (1 points)

methyl ethyl propyl butyl

Feedback: CH3- is the methyl substituent.