Table 5.
Transition metal N2 complexes with end-on interactions to an alkali cation.
| Complex | alkali cation | N-N bond length (Å) | νNN (cm−1) | cation-N distance (Å) |
|---|---|---|---|---|
| (3,5-Me2C6H3[Ad]N)3Mo(μ-N2)Na(THF)3 (1) | Na | 1.152(8) | 1783, 1757 | 2.227(9) |
| (3,5-Me2C6H3[iPr]N)3Mo(μ-N2)Na(THF)3 (2) | Na | 1.186(8) | 1783 | 2.196(7) |
| [(4-tBuC6H4N)3N]Mo(μ-N2)Na(15-crown-5) (3) | Na | 1.161(5) | 1815 | 2.362(5) |
| ([3,5-(2,4,6-iPr3C6H2)2C6H3N(CH2)2]3N)W(μ-N2)K (4) | K | 1.220(8) | 1745 | 2.536(7) |
| [{1,1′-(PEt2)2Fc}](Cp*)Mo(μ-N2)Na(15-crown-5) (5) | Na | 1.168(7) | 1791 | 2.302(5) |
| (2,6-[2,6-iPr2C6H3N=CMe]2C5H3N)Fe(p-tol)(μ-N2)Li(Et2O)3 (6) | Li | 1.138(3) | 2068 | 2.092(5) |
| (2,6-[2,6-iPr2C6H3N=CMe]2C5H3N)Fe(CH2tBu)(μ-N2)Li(Et2O)3 (7) | Li | 1.138(3) | 1948 | 2.083(6) |
| (2-[2,6-iPr2C6H3N=CMe]-6-[2,6-iPr2C6H3N-C=CH2]C5H3N)Fe(μ-N2)Na(Et2O)3 (9) | Na | 1.154(6) | 1965 | 2.389(6) |
| (2,6-[2,6-iPr2C6H3N=CMe]2C5H3N)Fe(μ-N2)Na[Na(THF)2] (10) | Na | 1.149(6) | 1899 | 2.333(5) |
| (Si(o-C6H4P(iPr)2)3)Fe(μ-N2)Na(THF)3 (14) | Na | 1.147(4) | 1891 | 2.282(3) |
| (B(o-C6H4P(iPr)2)3)Fe(μ-N2)Na(THF)x (15) | Na | 1.149(2) | 1879 | - |
| (C(o-C6H4PCPr)2)3)Fe(μ-N2)K(Et2O)3 (16) | K | 1.153(2) | 1870 | 2.656(2) |
| (CAAC)2Fe(μ-N2)K(18-crown-6) (17) | K | 1.035(4) | 1850 | 2.726(4) |
| (P(C6H5)3)3Co(μ-N2)Li(Et2O)3 (18) | Li | 1.17(2) | 1900 | 1.96(4) |
| (P(C6H5)3)3Co(μ-N2)Li(THF)3 (19) | Li | 1.19(4) | 1890 | 2.06(9) |
| (P(C6H5)3)3Co(μ-N2)Na(THF)3 (20) | Na | - | 1910 | - |
| tBuN=Nb[μ-(iPr)N-P(C6H5)2]3Co(μ-N2)Na(THF)5 (21) | Na | 1.115(4) | 1940 | 2.489(3) |
| tBuN=Ta[μ-(iPr)N-P(C6H5)2]3Co(μ-N2)Na(THF)5 (22) | Na | 1.124(4) | 1940 | 2.484(4) |