Republic of the Philippines

CENTRAL BICOL STATE UNIVERSITY OF AGRICULTURE

Sta. Cruz Poblacion, Calabanga, Camarines Sur 4405
Website: www.cbsua.edu.ph
Email Address: ca.calabanga@cbsua.edu.ph
Trunkline: (054) 881-3258

SCIE. 1- Organic Chemistry

NAME: __________________________________________________ DATE: ___________

COURSE AND YEAR: _________________

ACTIVITY 3: NAMING ORGANIC COMPOUNDS

General Strategy for Naming Simple Organic Compounds

Here is a simple list of rules to follow. Some examples are given at the end of the list.

1. Identify the longest carbon chain. This chain is called the parent chain.
2. Identify all of the substituents (groups appending from the parent chain).
3. Number the carbons of the parent chain from the end that gives the substituents the lowest
numbers. When compairing a series of numbers, the series that is the "lowest" is the one
which contains the lowest number at the occasion of the first difference. If two or more side
chains are in equivalent positions, assign the lowest number to the one which will come first
in the name.
4. If the same substituent occurs more than once, the location of each point on which the
substituent occurs is given. In addition, the number of times the substituent group occurs is
indicated by a prefix (di, tri, tetra, etc.).
5. If there are two or more different substituents they are listed in alphabetical order using the
base name (ignore the prefixes). The only prefix which is used when putting the substituents
in alphabetical order is iso as in isopropyl or isobutyl. The prefixes sec- and tert- are not
used in determining alphabetical order except when compared with each other.
6. If chains of equal length are competing for selection as the parent chain, then the choice
goes in series to:
a) the chain which has the greatest number of side chains.
b) the chain whose substituents have the lowest- numbers.
c) the chain having the greatest number of carbon atoms in the smaller side chain.
d)the chain having the least branched side chains.
7. A cyclic (ring) hydrocarbon is designated by the prefix cyclo- which appears directly in front
of the base name.

In summary, the name of the compound is written out with the substituents in alphabetical order
followed by the base name (derived from the number of carbons in the parent chain). Commas
are used between numbers and dashes are used between letters and numbers. There
are no spaces in the name.
 Republic of the Philippines
CENTRAL BICOL STATE UNIVERSITY OF AGRICULTURE
Sta. Cruz Poblacion, Calabanga, Camarines Sur 4405
Website: www.cbsua.edu.ph
Email Address: ca.calabanga@cbsua.edu.ph
Trunkline: (054) 881-3258

SCIE. 1- Organic Chemistry

TEST I

MULTIPLE CHOICES: Direction. Identify the choice that best completes the statement or answers
the question.

1. Which compound is a member of the alkene series of hydrocarbons?

a. Benzene b. propene c. toluene d. butadiene
2. The IUPAC name of an aldehyde has the ending _______?
a. –ol b. –al c. –oate d. –oic
3. A hydrocarbon molecule containing one triple covalent bond is classified as an __________.
a. Alkene b. alkane c. alkyne d. alkadiene
4. Which is the general formula for an aldehyde?

a. b. c. d.
5. Which is the structural formula for propanone (acetone)?

a. b. c. d.
6. All organic compounds must contain the element ______?
a. Hydrogen b. nitrogen c. halogens d. carbon
7. What makes carbon such a unique element?
a. Elemental carbon comes in two forms, diamond and graphite.
b. Carbon forms four bonds, although the ground state configuration would predict the
formation of fewer bonds.
c. Carbon forms covalent bonds rather than ionic bonds.
d. To a greater extent than any other element, carbon can bond to itself to form straight
chains, branched chains and rings.
e. Carbon has two stable isotopes, carbon-12 and carbon-13
8. A molecule with the formula C3H8 is a(n):
a. Hexane b. propane c. decane d. butane e. ethane
 Republic of the Philippines
CENTRAL BICOL STATE UNIVERSITY OF AGRICULTURE
Sta. Cruz Poblacion, Calabanga, Camarines Sur 4405
Website: www.cbsua.edu.ph
Email Address: ca.calabanga@cbsua.edu.ph
Trunkline: (054) 881-3258

SCIE. 1- Organic Chemistry

9. What is the name of the following compound?

a. 1,3-dibromophenol
b. 2,5-dibromophenol
c. 2,6-dibromophenol
d. m-dibromophenol
e. o-dibromophenol
10. Select the IUPAC name for: (CH3)2CHCH(OH)CH2C(CH3)3.
a. 2,5,5-trimethyl-3-hexanol c. 1,1,4,4-pentamethylbutanol
b. 1,1-dimethylisopentanol d. 2,5-dimethyl-4-hexanol
11. Which is NOT a physical property of alcohols or phenols?
a. Phenols are generally only slightly soluble in water.
b. The solubilities of normal primary alcohols in water decrease with increasing molecular
weight.
c. The hydroxyl group of an alcohol is nonpolar.
d. Due to hydrogen bonding, boiling points of alcohols are much higher than those of
corresponding alkanes.
e. Boiling points of normal primary alcohols increase with increasing molecular weight.
12. Give the IUPAC name of this compound: CH3OCH2CH3.
a. dimethyl ether b. methoxyethane c. methylethyloxide d. propyl ether

13. Select the IUPAC name for the compound below.

a. 2,4-dimethylpentanoic acid
b. 1,1,3-trimethylbutanoic acid
c. 1-hydroxy-2,4-dimethylpentanone
d. 2-carboxyisohexane
14. Select the best name for:
a. m-chlorobenzoic acid
b. o-chlorobenzaldehyde
c. p-chlorobenzoate
d.m-chlorosalicylic acid

15. The best classification for the following compound is: _____ .
a. aldehyde
b. ester
c. ketone
d. carboxylic acid
e. alcohol
 Republic of the Philippines
CENTRAL BICOL STATE UNIVERSITY OF AGRICULTURE
Sta. Cruz Poblacion, Calabanga, Camarines Sur 4405
Website: www.cbsua.edu.ph
Email Address: ca.calabanga@cbsua.edu.ph
Trunkline: (054) 881-3258

SCIE. 1- Organic Chemistry

Test II
Direction: Name or draw the following compound

Chemical structure IUPAC Name

8
 Republic of the Philippines
CENTRAL BICOL STATE UNIVERSITY OF AGRICULTURE
Sta. Cruz Poblacion, Calabanga, Camarines Sur 4405
Website: www.cbsua.edu.ph
Email Address: ca.calabanga@cbsua.edu.ph
Trunkline: (054) 881-3258

SCIE. 1- Organic Chemistry

9

10

11

12

13

14

15

For each of the following, name the functional group and state the type of
organic compound

16

17

18
 Republic of the Philippines
CENTRAL BICOL STATE UNIVERSITY OF AGRICULTURE
Sta. Cruz Poblacion, Calabanga, Camarines Sur 4405
Website: www.cbsua.edu.ph
Email Address: ca.calabanga@cbsua.edu.ph
Trunkline: (054) 881-3258

SCIE. 1- Organic Chemistry

19

20

Direction: Identify the functional groups for the following organic molecules.

A. Which of the following structures contains an amine?

1. _____________

B. Which of the following structures contains a ketone?

1. _____________

C. Which of the following structures contains an alkyne?

1. _____________

D. Which of the following structures contains an ether?

1. _____________
 Republic of the Philippines
CENTRAL BICOL STATE UNIVERSITY OF AGRICULTURE
Sta. Cruz Poblacion, Calabanga, Camarines Sur 4405
Website: www.cbsua.edu.ph
Email Address: ca.calabanga@cbsua.edu.ph
Trunkline: (054) 881-3258

SCIE. 1- Organic Chemistry

NOMENCLATURE- FUNCTIONAL GROUPS

Direction: Identify the class of the following compounds. For any alkanes, alkenes, alkynes,
aromatic compounds, carboxylic acids or alcohols, provide the IUPAC name of the molecule.
 Republic of the Philippines
CENTRAL BICOL STATE UNIVERSITY OF AGRICULTURE
Sta. Cruz Poblacion, Calabanga, Camarines Sur 4405
Website: www.cbsua.edu.ph
Email Address: ca.calabanga@cbsua.edu.ph
Trunkline: (054) 881-3258

SCIE. 1- Organic Chemistry

A. Draw the structural formulas for the following compounds:

15. 4-methylhexanoic acid

16. 2-ethyl-1-pentanol

17. 2,4-dinitrotoluene

18. 3-ethyl-2,3-dimethyl-2-pentanol

19. 5-chloro-4-methyl-3-heptanone

20. 3,3,6,6-tetraethyl-4-octyne

PREPARED BY:

MS. RICA MAE B. LABASAN

Organic Chemistry Instructor