What is each compound’s systematic name?

Short Answer

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  1. Butane
  2. 1-propanol
  3. 5-propyldecane
  4. 4-propyl-1-nonanol
  5. 2-methyl-5-(1-methylethyl) octane
  6. 6-chloro-4-ethyl-3-methyloctane
  7. 1-methoxy-5-methyl-3-propylhexane
  8. 2,3-dimethyl-6-(2-methylpropyl) decane
  9. 8-methyl-4-decanamine
  10. 1-methyl-2-(2-methylpropyl) cyclohexane

Step by step solution

01

Rules for finding the systematic names of alkanes for a), c), e), h) and j).

  • Firstly, Identify the longest continuous carbon chain and give it a name.
  • Later, Identify and list the several organisations that are linked to this chain.
  • Start numbering the chain from the end that is closest to a substituent group.
  • Assign an appropriate number and name to each substituent group's location.
  • Assemble the name by listing the groups alphabetically by full name (e.g. cyclopropyl before isobutyl).
  • When alphabetizing, the prefixes di, tri, tetra, and others, which are used to denote many groups of the same kind, are ignored.

Subpart (a) The systematic name of compound (a) is.

The systematic name for the given alkane is butane.

Subpart (c) The systematic name of compound (c).

The systematic name of the given alkane is 5-propyldecane.

Subpart (e) The systematic name of compound (e).

The systematic name of the given alkane is 2-methyl-5-(1-methylethyl) octane.

Subpart (h) The systematic name of compound (h).

The systematic name of the given alkane is 2,3-dimethyl-6-(2-methylpropyl) decane.

Subpart (j) The systematic name of compound (j).

The systematic name of the given alkane is 1-methyl-2-(2-methylpropyl) cyclohexane

02

Rules for finding the systematic names of alcohols for b) and d).

The longest continuous chain containing the functional group is known as the parent hydrocarbon.

  • The parent hydrocarbon is numbered in the direction that results in the lowest possible number for the functional group suffix.
  • If the parent hydrocarbon has two OH groups, the suffix "diol" is added to the name.
  • If a functional group suffix and a substituent are both present, the functional group suffix receives the lowest possible number.
  • If counting the functional group suffix in either direction yields the same number, the chain is numbered in the direction that yields the lowest possible number of substituents.
  • If more than one substituent is present, the substituents are given alphabetically.

Subpart (b) The systematic name of compound (b).

As the given structure is alcohol. Therefore, the systematic name for the compound is 1-propanol.

Subpart (d) The systematic name of compound (d).

The systematic name for the given alcohol compound is 4-propyl-1-nonanol.

03

Rules for finding the systematic names of halide for f).

Alkyl halides are classified as substituted alkanes in the IUPAC system. The halogen prefixes all end in "o." (that is, fluoro, chloro, bromo, and iodo). As a result, alkyl halides are often referred to as haloalkanes.

Therefore, the given structure (f) has the systematic name 6-chloro-4-ethyl-3-methyloctane.

04

Rules for finding the systematic names of ether for g).

An ether is classified as an alkane with a RO substituent in the IUPAC system. By replacing the "yl" ending in the name of the alkyl substituent with "oxy," the substituents are named.

Therefore, the given structure (g) has the systematic name 1-methoxy-5-methyl-3-propylhexane.

05

Rules for finding the systematic names of amines for i).

  • The amine functional group is denoted by the suffix "amine" in the IUPAC system.
  • The end of the parent hydrocarbon's name is replaced by "amine."
  • A number specifies the carbon to which the nitrogen is linked, and the number can appear before the name of the parent hydrocarbon or before "amine." Any alkyl group bonded to nitrogen has a "N" (in italics) before its name to show that it is bonded to nitrogen rather than carbon.
  • The substituents are listed in alphabetical order, regardless of whether they are connected to the nitrogen or the parent hydrocarbon, and then a number or a "N" is assigned to each one. The chain is numbered in the way that results in the lowest number for the functional group suffix.
  • Therefore, the given structure (i) has the systematic name 8-methyl-4-decanamine.

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Most popular questions from this chapter

A student was given the structural formulas of several compounds and was asked to give them systematic names. How many did the student name correctly? Correct those that are misnamed.

  1. 4-bromo-3-pentanol
  2. 2,2-dimethyl-4-ethylheptane
  3. 5-methylcyclohexanol
  4. 1,1-dimethyl-2-cyclohexanol
  5. 5-(2,2-dimethylethyl)nonane
  6. Isopentyl Bromide
  7. 3,3-dichlorooctane
  8. 5-ethyl-2-methylhexane
  9. 1-bromo-4-pentanol
  10. 3-isopropyloctane
  11. 2-methyl-2-isopropylheptane

l. 2-methyl-N, N-dimethyl-4-hexanamine

a. How many primary carbons does each of the following compounds have?

b. How many secondary carbons does each one have?

c. How many tertiary carbons does each one have?

Draw skeletal structures for the following:

a. 5-ethyl-2-methyloctane

b. 1,3-dimethylcyclohexane

c. 2,3,3,4-tetramethylheptane

d. propyl cyclopentane

e. 2-methyl-4-(1-methylethyl) octane

f. 2,6-dimethyl-4-(2-methylpropyl)decane

Draw all the isomers that have molecular formula C5H12Br. (Hint: There are eight.)

a. Give the systematic name for each of the isomers.

b. Give a common name for each isomer that has a common name.

c. How many of the isomers are primary alkyl halides?

d. How many of the isomers are secondary alkyl halides?

e. How many of the isomers are tertiary alkyl halides?

a. Draw a potential energy diagram for rotation about the C-C bond of 1,2-dichloroethane through 360degree, starting with the least stable conformer. The anti-conformer is 1.2 kcal/mol more stable than a gauche conformer. A gauche conformer has two energy barriers, 5.2 kcal/mol and 9.3 kcal/mol.

b. Draw the conformer that is present in greatest concentration.

c. How much more stable is the most stable staggered conformer than the most stable eclipsed conformer?

d. How much more stable is the most stable staggered conformer than the least stable eclipsed conformer?

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