Organoindium-nitrogen derivatives

A relatively large number of diorganoindium amides, RaInNR R , have been synthesized and several have been structurally characterized by X-ray diffraction. Practically all are self-organized cyclic dimers, 99, containing an In2N2 ring. 

The association is preserved in solution, even occasionally in the gas phase, as demonstrated by numerous NMR, mass spectrometric, and molecular weight determinations performed not only on the compounds characterized structurally, and cited here, but also on numerous others [293, 298, 303-305]. Indium-nitrogen cubane supermolecules, e.g. [MeInNBu ]4 [306], ](THF)MeInNC6H4F-p]4 [155], and [MeInNC6F5]4 [231a] have also been described. 

Dimethylindium cyanide, [Me2lnCN] c, has a supramolecular spiral chain structure, 100, associated by In-N dative bonding (2.260 A) [302]. 

Linear arrays fonned by nitrogen bridging of indium atoms have been reported 

A less common self-organized structure, 101, is that of dimeric [Me2Si(NBu )2lnMe]2, which contains an In2N2 ring, as a result of dative bond association (In-N 2.277 and 2.256 A) of two SiN2ln chelate rings [307]. 

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