Saved Bookmarks
| 1. |
Bond order normally gives idea of stability of a molecular species. All the molecules viz. H_(2) Li_(2) and B_(2) have the same bond order yet they are not equally stable. Their stability order is |
|
Answer» `H_(2) GT B_(2) gt Li_(2)` `H_(2) = sigma2s^(2)` (no electron anti-bonding) `Li_(2)= sigma 1s^(2) sigma ^(* *) 1 s^(2) sigma 2s^(2)` (two anti-bonding electrons) `B_(2)=sigma 1s^(2) 1s^(2) sigma^(* *) 1s^(2) sigma 2s^(2) sigma^(* *) 2s^(2){pi 2p_(y)^(1)=pi2p_(z)^(1)}` (4 anti-bonding electrons) THOUGH the bond order of all the species are same (B.O = 1) but stability is different. This is DUE to difference in the presence of no. of anti-bonding electron. Higher the no. of anti-bonding electron lower is the stability hence the correct order is `H_(2) gt Li_(2) gt B_(2)` |
|