We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
A Stable Homoleptic Organometallic Iron(IV) Complex.
- Authors
Prakash, Om; Chábera, Pavel; Rosemann, Nils W.; Huang, Ping; Häggström, Lennart; Ericsson, Tore; Strand, Daniel; Persson, Petter; Bendix, Jesper; Lomoth, Reiner; Wärnmark, Kenneth
- Abstract
A homoleptic organometallic FeIV complex that is stable in both solution and in the solid state at ambient conditions has been synthesized and isolated as [Fe(phtmeimb)2](PF6)2 (phtmeimb=[phenyl(tris(3‐methylimidazolin‐2‐ylidene))borate]−). This FeIV N‐heterocyclic carbene (NHC) complex was characterized by 1H NMR, HR‐MS, elemental analysis, scXRD analysis, electrochemistry, Mößbauer spectroscopy, and magnetic susceptibility. The two latter techniques unequivocally demonstrate that [Fe(phtmeimb)2](PF6)2 is a triplet FeIV low‐spin S=1 complex in the ground state, in agreement with quantum chemical calculations. The electronic absorption spectrum of [Fe(phtmeimb)2](PF6)2 in acetonitrile shows an intense absorption band in the red and near IR, due to LMCT (ligand‐to‐metal charge transfer) excitation. For the first time the excited state dynamics of a FeIV complex was studied and revealed a ≈0.8 ps lifetime of the 3LMCT excited state of [Fe(phtmeimb)2](PF6)2 in acetonitrile.
- Subjects
ABSORPTION spectra; PYRAZOLYL compounds; IRON; MAGNETIC susceptibility; SOLID solutions; ELECTROCHEMISTRY; ORGANOMETALLIC compounds
- Publication
Chemistry - A European Journal, 2020, Vol 26, Issue 56, p12728
- ISSN
0947-6539
- Publication type
Article
- DOI
10.1002/chem.202002158