Cationic silyldiazenido complexes of the Fe(diphosphine)2(N2) platform: structural and electronic models for an elusive first intermediate in N2 fixation

Adam D Piascik; Peter J Hill; Andrew D Crawford; Laurence R Doyle; Jennifer C Green; Andrew E Ashley

doi:10.1039/c7cc04188h

Cationic silyldiazenido complexes of the Fe(diphosphine)₂(N₂) platform: structural and electronic models for an elusive first intermediate in N₂ fixation

Chem Commun (Camb). 2017 Jul 4;53(54):7657-7660. doi: 10.1039/c7cc04188h.

Authors

Adam D Piascik¹, Peter J Hill, Andrew D Crawford, Laurence R Doyle, Jennifer C Green, Andrew E Ashley

Affiliation

¹ Department of Chemistry, Imperial College London, Exhibition Road, South Kensington, London SW7 2AZ, UK. a.ashley@imperial.ac.uk.

PMID: 28643826
DOI: 10.1039/c7cc04188h

Abstract

The first cationic Fe silyldiazenido complexes, [Fe(PP)₂(NN-SiMe₃)]⁺[BAr^F₄]^- (PP = dmpe/depe), have been synthesised and thoroughly characterised. Computational studies show the compounds to be useful structural and electronic surrogates for the more elusive [Fe(PP)₂(NN-H)]⁺, which are postulated intermediates in the H⁺/e^- mediated fixation of N₂ by Fe(PP)₂(N₂) species.