Question #d16c7

1 Answer
Ernest Z.
Jun 28, 2015

It depends on the particular isomer, but the expected answer is probably (d) both b and c.

Explanation:

Alkenes and alkynes can decolourize bromine water.

(a)

Possible structures are #"CH"_3"CH"_2"CH"_2"COOH"# and #("CH"_3)_2"CHCOOH"#.

There are no #"C=C"# or #"C≡C"# bonds, so neither of these isomers will decolourize bromine water.

(b)

Two possible structures are #"CH"_3"CH"_2"CH=CH"_2# and #"CH"_3"CH=CHCH"_3#. Both of these will decolourize bromine water.

A third possibility is cyclobutane. It will not decolourize bromine water.

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(c)

There are many possible structures.

  • #"CH"_3"CH=CHCH=CH"_2 #and various diene isomers
  • #"CH"_3"CH"_2"CH"_2"C≡CH"# and various alkyne isomers
  • Cyclopentene
  • Methylcyclobutene and cyclopropene isomers.

All of these will decolourize bromine water.

But bicyclo[2.1.0]pentane does not decolourize bromine water.

www.lookchem.com

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