Question

Calculate the bond order li2 and b2 molecule using the molecular orbital diagram

Answer 1

Explanation:

•Bond order is the number of chemical bonds between a pair of atoms.

•Bond order is the number of chemical bonds between a pair of atoms; in diatomic nitrogen (N≡N) for example, the bond order is 3, while in acetylene (H−C≡C−H), the bond order between the two carbon atoms is 3 and the C−H bond order is 1. Bond order indicates the stability of a bond. In a more advanced context, bond order does not need to be an integer.

#Dilithium (Li2)

•The last diagram presents the molecule dilithium (Li2). The 1s electrons do not take part in the bonding, but the 2s electrons fill the bonding orbital. The molecule Li2 is a stable molecule in the gas phase, with a bond order of one.

Bond Order=2(bonding electrons)−0(anti−bonding e−)2=1

•The dilithium molecule

•Without the 1s electrons participating in bonding, the p electrons completely fill the bonding orbital; this leaves the antibonding orbital empty and gives a bond order of one, indicating a stable molecule (in this case, in the gas phase).

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