Isolobal Principle

Moderators: Chem_Mod, Chem_Admin

harperlacroix1a
Posts: 43
Joined: Fri Sep 28, 2018 12:19 am

Isolobal Principle

Postby harperlacroix1a » Sun Nov 25, 2018 7:39 pm

Can someone explain the isolobal principle/analogy to me? In problem 3.101 of the 6th edition, they replace bonds of C-H in the benzene structure with nitrogen but I'm confused as to why this is possible or why it happens.

Timothy_Yueh_4L
Posts: 57
Joined: Fri Sep 28, 2018 12:28 am

Re: Isolobal Principle

Postby Timothy_Yueh_4L » Sun Nov 25, 2018 7:53 pm

The isolobal principle states that an element or group of elements with similar shape, symmetry and radial extent; with approximately the same energy; and with the same number of electrons available for cluster bonding is able to replace another. In the case of benzene, the C-H can be replaced by N because nitrogen can provide the same aspects of symmetry as C-H. In the C-C bond, carbon forms a double and single bind with another carbon molecule and between the C-H bond, carbon forms a single bond with a hydrogen atom. Nitrogen provides the same properties in that it can double and single bond with a neighboring carbon or nitrogen and the resulting lone pair would be the equivalent of a C-H bond.


Return to “Bond Lengths & Energies”

Who is online

Users browsing this forum: No registered users and 1 guest