Question

Write & Insert Fields Preview Results Finish 5. Based on Molecular Orbital Theory MOT i) Write the ground state electron configuration of Bez, B2, C2, F2 molecules. Calculate Bond Order for each molecule? ii) Show whether the molecule can exist or not, indicate its magnetic behavior & indicate the HOMO & LUMO orbitals? iii) Calculate the BO of acetylide ion Cy?-? Indicate whether it exist or not. Hint Lito N; use: lolo, 19,20,17, 20, & or for 0& Fuse: lolo 20, 1x 17, 20: Also use the MO energy diagram in Handout2 or you book

Answer 1

Bond Order(BO) = 1/2(Na - Nb) where Na and Nb are number of electrons in antibonding MO and in bonding MO respectively.

Be2 :  

(205)?(20*s)

Here, Na = 2 and Nb = 2

BO = 1/2(2-2) = 0

B2:

(205)?(20*s)?(112px)+(112py)

Here, Na = 2 and Nb = 4

BO = 1/2(4-2) = 1

F2 :

(205)?(20*s)?(02px)?([12py)? (112pz)?(112px)?(12pm)?

Here, Na = 8 and Nb = 10

BO = 1/2(8-6) = 1

For C22- : Nb = 10 and Na = 4

BO = 1/2(10-4) = 3

It will exist