Q11.39CP - Chemistry: Molecular Nature Of Matter And Change

Question

Butadiene is a colourless gas used to make synthetic rubber and many other compounds. 

1. How many sigma bonds and pi bonds does the molecule have?
2. Are cis-trans arrangements about the double bonds possible? Explain.

                

Step-by-Step Solution

Answer

Hybridization of central atom and bond angle:

a. There are 9 sigma bonds and two pi- bonds present in the molecule, Butadiene.

b. Yes, the cis-trans are possible in the butadiene around the double bond.

Step 1: Bonding

Bonding may be defined as the force of attraction between two or more atoms to form a compound. The molecule can have the same atom and a different atom.

Isomerism may be defined as the occurrence of the same molecule in different geometric, properties (physical and chemical).

Step 2: Bond Representation

There is the presence of the double bond at the alternate position in the molecule of butadiene. There are 9 sigma bonds and 2 pi-bond.

Sigma bond is the bond between the molecules that are formed by the head-on-overlapping of the hybrid orbitals of the atoms.

Pi bond is the bond between the molecules that are formed by the side-on-overlapping of the hybrid orbitals of the atoms.

Step 3: Geometric Isomers

There can be the possibility of the cis-trans isomer in the butadiene around the single in the middle. In cis-isomer, The H-atom is one side of the molecule and in trans-isomer, the molecule is cross position.