Ethylenediamine nitrido

The dianion [Fe3(CO)n]2 was first isolated by Hieber1 as the [Fe(en)3]2 + (en = ethylenediamine) salt. Attempts to prepare the tetraethylammonium salt were unsuccessful.2 In the synthesis reported here, this dianion is isolated as the /j-nitrido-bis(triphenylphosphorus)(1+) salt, (Ph3P)2N+, which affords high yields of a pure product. 

There are now a substantial number of nitrido complexes of osmium(VI) and osmium(IV) as well as the osmiamate ion [OsVII 03N]. In addition to the ammine and ethylenediamine complexes, much recent work has been carried out on the bipy, phen and terpy complexes, often in connection with research into the photodissociation of water. The nitrosyl chemistry of the element, though seemingly not as extensive as that of ruthenium, has received much attention, and there has been considerable work on the phosphine, arsine and stibine complexes. 

Loberg MD, Fields AT (1978) Chemical structure of technetium-99m-labeled N-(2,6-dimethyl-phe-nylcarbamoylmethyl)-iminodiacetic acid ( Tc-HIDA). Int J Appl Radiat Isot 29 167-173 March A, Garuti P, Duatti A et al (1990) Synthesis of technetium(V)-nitrido complexes with chelating amines a novel class of monocationic, octahedral complexes containing the [Tc = N] core. Crystal structures of [TcN(en)2Cl] (en = ethylenediamine) and [TcN(tad)Cl] (tad = 1,5,8,12-tet-raazadodecane). Inorg Chem 29 2091-2096... 

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