| NBO donor | NBO acceptor | E(2) | NBO donor | NBO acceptor | E(2) |
| LP(1)N21 | LP*(6)Zn | 40.40 | LP(1)N6 | LP*(6)Zn | 40.40 |
| LP(1)N21 | LP*(8)Zn | 19.58 | LP(1)N6 | LP*(8)Zn | 19.56 |
| LP(1)N21 | LP*(9)Zn | 28.34 | LP(1)N6 | LP*(9)Zn | 28.37 |
| LP(1)N4 | LP*(6)Zn | 72.87 | LP(1)N5 | LP*(6)Zn | 62.13 |
| LP(1)N4 | LP*(7)Zn | 62.24 | LP(1)N5 | LP*(7)Zn | 58.62 |
| LP(1)N4 | LP*(8)Zn | 12.40 | LP(1)N5 | LP*(8)Zn | 16.91 |