Table 8. Number of Instances Observed in CSD for Complexes Containing Indicated Number of Z···N Pnicogen Bonds to Central Z Atoma.
| ZX3 |
ZR3 |
|||||
|---|---|---|---|---|---|---|
| number of Z···N contacts | 110% | 120% | 130% | 110% | 120% | 130% |
| 1 | 7 | 5 | 1 | 285 | 105 | 14 |
| 2 | 12 | 4 | 4 | 178 | 69 | 7 |
| 3 | 4 | 2 | 1b | 55 | 36 | 10c |
| 4 | 9 | 0 | 0 | 12 | 0 | 0 |
| 5 | 0 | 0 | 0 | 13 | 0 | 0 |
a
X refers to halogen atoms, and R refers to any substituent. Percentages indicate the internuclear Z···N distance as a fraction of the sum of their covalent radii.
b
R(Bi···N) = 2.92 Å, 134% of covalent radii sum.
c
1 with Z = P, 0 with As, 7 with Sb, 2 with Bi.