The structure of citronella, used as an insect repellent, is shown below. Please

Question

The structure of citronella, used as an insect repellent, is shown below. Please answer the following questions based upon the structure. Be sure to add lone pairs to non-hydrogen atoms, if they are needed to give the atom an octet of electrons.

(a) What is the shape of the atom labeled 5?

linear

trigonal planar    

bent at 120°

tetrahedral

trigonal pyramidal

bent at 109°

(b) What is the bond angle of the atom labeled 1?

109

120   

180

90

(c) What is the hybridization of the atom labeled 5?

(d) Which atoms have three dimensional structure? (Select all that apply.)

1 2 3 4 5 6

Explanation / Answer

a)The carbon labelled 5 is sp2 hybridised and thus is trigonal planar.

b)The carbon lablelled 1 is also sp2 hybridised , thus the bond angle is 120.

c) The hybridisation of the atom labelled 5 is sp2 ( as it has one pi bond).

d) The atoms having 3 dimensional structure among the given atoms are 2, 3 and 6 which are sp3 hybridised ( though attached to a planar carbon).

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