Dinitrogen complexes, synthesis

The dinitrogen complex [Os(NH3)5N2]2+ is a useful synthetic intermediate, while the presence of the weakly nucleophilic triflate group enables it to be easily removed in the synthesis of the dihydrogen complex. 

Figure 2.80 Synthesis of the dinitrogen complex IrCl(N2)(PPh3)2.

Dinitrogen-transition metal complexes synthesis, properties and significance. D. Sellmann, Angew. Chem., Int. Ed. Engl., 1974,13, 639-649 (86). 

The pyNP2 ligand was used for the synthesis of a molybde-num(0) dinitrogen complex (Scheme 11) (45). First the ligand was coordinated to a Mo(III) halide precursor to form [MoX3 (pyNP2)(thf)] (X Cl, Br ). Reduction of the Mo(III) complex... 

Diazadiphosphetidines nomenclature of, 14 3 synthesis of, 14 71 Diazaphosphetidinone, 14 85 1,6-Diazatriptycene, 33 1-2 Diazene, see also Diimide complexes, osmium, 37 260 ligand, 27 227-235 complexes, 27 230-235, 256-257 free state, 27 227-230 in preparation of dinitrogen complexes, 27 222, 232... 

Bis(cyclopentadienyl)titanium(II) dicarbonyl complexes, preparation and reactivity, 4, 250 Bis(cyclopentadienyl)titanium(II) dinitrogen complexes, preparation and reactivity, 4, 250 Bis(cyclopentadienyl)titanium halides ligand metathesis reactions, 4, 537 olefin polymerization, 4, 538 organic reactions, 4, 540 properties, 4, 530 reductions, 4, 532 synthesis, 4, 510... 

Bis(cyclopentadienyl)zirconium(III) complexes alkynyl-bridged complexes, 4, 749 dinitrogen complexes, 4, 747 electrochemical reduction, 4, 745 phosphido-bridged complexes, 4, 750 Bis(cyclopentadienyl)zirconium(IV) complexes electrochemical reduction, 4, 745 with M-C r/)-bonds, 4, 895 with M-C r/i2-bonds, 4, 887 with M-C r/i3-bonds, 4, 884 with M-H bonds, 4, 878 with M-N bonds, 4, 910 with M-0 bonds, 4, 917 with M-P bonds, 4, 927 with M-S bonds, 4, 930 with M-Si bonds, 4, 925 non-functionalized metallocene halides, 4, 870 ring-functionalized metallocene halides, 4, 874 Bis(cyclopentadienyl)zirconium(III) halides, in organic synthesis, 4, 754... 

Passage of dinitrogen into this mixture precipitates the dinitrogen complex as a blue-black microcrystalline solid, and thus provides a synthesis of pure CpfTi. The yellow-orange CpfTi turns yellow-green in solution, and NMR measurements on the paramagnetic Ti(II) species have led to suggestions of the tautomerism ... 

The hydrido dinitrogen complexes, whilst failing to fulfill the modern alchemists dream of a catalyst for the low temperature low pressure ammonia synthesis, have been thoroughly investigated and some of their spectroscopic properties are listed in Table 10. 

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