Question

Describe isolobal species with examples?

Answer 1

Isolobal species:

• Isolobal species are those pairs whose frontier orbitals are the same in number, have similar symmetry, have approximately the same energy, and have the same number of electrons on them.
• The isolobal principle is a concept that has been used in organometallic chemistry to relate the structure of organic and inorganic molecular fragments and to predict the bonding properties of organometallic compounds.
• The isolobal Principle is used to describe the reactivity and chemical bonding of an organometallic compound.
• A standard approach to determining structure is NMR, infrared spectroscopy, and X-ray diffraction.

Isolobal species are those pairs whose frontal lobes satisfy the following properties:

• Isolobal species have similar symmetry.
• Isolobal species have the nearby same energy.
• They have the same number of electrons.
• For example, ${\mathrm{CH}}_{3,}{\mathrm{NH}}_{2,}\mathrm{OH},\mathrm{etc}.$
• All these groups combine to form ordinary bonds like: ${\mathrm{CH}}_3-{\mathrm{CH}}_{3,}{\mathrm{NH}}_2-{\mathrm{NH}}_2,\mathrm{F}-\mathrm{F},\mathrm{etc}.$