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Updated: Jun 8, 2025

Preparation and Use of Carbonyl-decorated Carbenes in the Activation of White Phosphorus
Published on: October 3, 2014
Synthesis of heteroleptic bis-phosphine bis-NHC iron (0) complexes: a strategy to enhance small molecule activation
Christian M Andre1, Nathaniel K Szymczak1
1Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, MI 48109, USA. nszym@umich.edu.
Abstract:
We report the synthesis of heteroleptic iron complexes supported by both a bis-phosphine ligand (depe) and a bis-NHC ligand. The mixed ligand sets provide access to iron (0) adducts of N2 and CO that are highly activated, in comparison to homoleptic (i.e. Fe(depe)2L) variants. Computational and experimental studies revealed the mixed ligand set distorts the geometric and electronic structure to yield an unusually basic iron. Although protonation occurred at Fe, silylation of the Fe(0)N2 complex afforded a highly activated silyldiazenido [FeNNSiMe3]+ complex.
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