Manipal MET2014ChemistryChemical Bonding and Molecular Structure
Order the species CF ⁺, CF and CF ⁻ according to increasing C - F bond length
Options
- ACF ⁺ CF CF ⁻
- BCF ⁺ CF ⁻ CF
- CCF ⁻ CF CF ⁺
- DCF CF ⁻ CF ⁺
Correct answer
A. CF ⁺ CF CF ⁻
Step-by-step solution
The molecular orbital electronic configuration of CF (15 e ) is 1 s^2, ^* 1 s^2 2 s^2 ^* 2 s^2 2 p_z^2 2 p_x^2 2 p_y^2, 2 p_x^1 Bond order ( BO )= 10-5 2 =2.5 In CF ⁺ , there is one electron less in antibonding MO therefore, BO = 10-4 2 =3 In CF ⁻ , there is one electron more in antibonding MO therefore, BO = 10-6 2 =2 Bond length 1 Bond order Hence, the order of bond length in given series is CF ⁺ CF CF ⁻ .