Title: High-spin iron(II) complexes with mono-phosphorylated 2,6-diaminopyridine ligands
Language: English
Authors: Schröder-Holzhacker, Christan 
Stöger, Berthold  
Pittenauer, Ernst 
Allmaier, Günter  
Veiros, Luis Filipe  
Kirchner, Karl  
Category: Original Research Article
Issue Date: 2016
Schröder-Holzhacker, C., Stöger, B., Pittenauer, E., Allmaier, G., Veiros, L. F., & Kirchner, K. (2016). High-spin iron(II) complexes with mono-phosphorylated 2,6-diaminopyridine ligands. Monatshefte Für Chemie - Chemical Monthly. https://doi.org/10.1007/s00706-016-1731-9
Journal: Monatshefte für Chemie - Chemical monthly
ISSN: 1434-4475
Several new monophosphorylated 2,6-diaminopyridine ligands bearing PiPr2 and PtBu2 units (PNNH2-iPr, PNNH2-tBu, PNNHMe-iPr, and PNNHEt-iPr) are prepared by treatment of the respective 2,6-diaminopyridines with the chlorophosphines PiPr2Cl and PtBu2Cl in the presence of a base. Treatment of anhydrous FeCl2 with 1 equiv of these afforded the tetracoordinated coordinatively unsaturated 14e− complexes [Fe(κ2P,N-PNNH2-iPr)Cl2] and [Fe(κ2P,N-PNNH2-tBu)Cl2], while with PNNHMe-iPr and PNNHEt-iPr a phosphine transfer reaction of a second PN ligand took place to yield the known PNP pincer complexes [Fe(κ3P,N,P-PNPMe-iPr)Cl2] and [Fe(κ3P,N,P-PNPEt-iPr)Cl2]. The four-coordinate complexes [Fe(κ2P,N-PNNH2-iPr)Cl2] and [Fe(κ2P,N-PNNH2-tBu)Cl2] did not react with CO and the formation of iron PNC pincer complexes was not observed. The reason for the reluctance to add CO was investigated in detail by DFT calculations.
Keywords: Iron; Aminophosphine ligands; DFT calculations; Carbon monoxide
DOI: 10.1007/s00706-016-1731-9
Library ID: AC11361251
URN: urn:nbn:at:at-ubtuw:3-2899
Organisation: E163 - Institut für Angewandte Synthesechemie 
Publication Type: Article
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