Iron(II) complexes based on electron-rich, bulky PNN- and PNP-type ligands

Jing Zhang; Mark Gandelman; Dominik Herrman; Gregory Leitus; Linda J W Shimon; Yehoshoa Ben-David; David Milstein

doi:10.1016/j.ica.2005.11.039

Iron(II) complexes based on electron-rich, bulky PNN- and PNP-type ligands

Jing Zhang, Mark Gandelman, Dominik Herrman, Gregory Leitus, Linda J W Shimon, Yehoshoa Ben-David, David Milstein

Weizmann Institute of Science, Israel

Research output: Contribution to journal › Article

64 Citations (Scopus)

Abstract

Reaction of the PNN ligand ((2-(di-tert-butylphosphinomethyl)-6- diethylaminomethyl)pyridine) with 1 equiv. of anhydrous FeCl₂ in THF results in the formation of (PNN)FeCl₂ (1). The cationic complex [(PNN)Fe(THF)Cl](PF₆) (2) was obtained by chloride abstraction from 1 with 1 equiv. of TlPF₆. Similarly, the PNP-type complexes 3 and 4 were obtained from FeCl₂ with 1 equiv. of t-Bu-PNP (2,6-bis(di-tert-butylphosphinomethyl)pyridine) and i-Pr-PNP (2,6-bis(di-iso-propylphosphinomethyl)pyridine), respectively. Complexes 1 and 3 were characterized by X-ray diffraction and elemental analyses. In both structures the Fe(II) centers exhibit a distorted square pyramidal geometry comprising two chloride ligands and one tridentate PNN or PNP ligand. The magnetic properties of the paramagnetic complexes 1-4 are discussed.

Original language	English
Pages (from-to)	1955-1960
Number of pages	6
Journal	Inorganica Chimica Acta
Volume	359
Issue number	6
DOIs	https://doi.org/10.1016/j.ica.2005.11.039
Publication status	Published - Apr 10 2006

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Keywords

Iron complexes
Magnetic properties
Paramagnetic
PNN ligand
PNP ligand
X-ray crystal structures

ASJC Scopus subject areas

Biochemistry
Inorganic Chemistry
Physical and Theoretical Chemistry
Materials Chemistry

Cite this

Zhang, J., Gandelman, M., Herrman, D., Leitus, G., Shimon, L. J. W., Ben-David, Y., & Milstein, D. (2006). Iron(II) complexes based on electron-rich, bulky PNN- and PNP-type ligands. Inorganica Chimica Acta, 359(6), 1955-1960. https://doi.org/10.1016/j.ica.2005.11.039

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abstract = "Reaction of the PNN ligand ((2-(di-tert-butylphosphinomethyl)-6- diethylaminomethyl)pyridine) with 1 equiv. of anhydrous FeCl2 in THF results in the formation of (PNN)FeCl2 (1). The cationic complex [(PNN)Fe(THF)Cl](PF6) (2) was obtained by chloride abstraction from 1 with 1 equiv. of TlPF6. Similarly, the PNP-type complexes 3 and 4 were obtained from FeCl2 with 1 equiv. of t-Bu-PNP (2,6-bis(di-tert-butylphosphinomethyl)pyridine) and i-Pr-PNP (2,6-bis(di-iso-propylphosphinomethyl)pyridine), respectively. Complexes 1 and 3 were characterized by X-ray diffraction and elemental analyses. In both structures the Fe(II) centers exhibit a distorted square pyramidal geometry comprising two chloride ligands and one tridentate PNN or PNP ligand. The magnetic properties of the paramagnetic complexes 1-4 are discussed.",

keywords = "Iron complexes, Magnetic properties, Paramagnetic, PNN ligand, PNP ligand, X-ray crystal structures",

author = "Jing Zhang and Mark Gandelman and Dominik Herrman and Gregory Leitus and Shimon, {Linda J W} and Yehoshoa Ben-David and David Milstein",

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T1 - Iron(II) complexes based on electron-rich, bulky PNN- and PNP-type ligands

AU - Zhang, Jing

AU - Gandelman, Mark

AU - Herrman, Dominik

AU - Leitus, Gregory

AU - Shimon, Linda J W

AU - Ben-David, Yehoshoa

AU - Milstein, David

PY - 2006/4/10

Y1 - 2006/4/10

N2 - Reaction of the PNN ligand ((2-(di-tert-butylphosphinomethyl)-6- diethylaminomethyl)pyridine) with 1 equiv. of anhydrous FeCl2 in THF results in the formation of (PNN)FeCl2 (1). The cationic complex [(PNN)Fe(THF)Cl](PF6) (2) was obtained by chloride abstraction from 1 with 1 equiv. of TlPF6. Similarly, the PNP-type complexes 3 and 4 were obtained from FeCl2 with 1 equiv. of t-Bu-PNP (2,6-bis(di-tert-butylphosphinomethyl)pyridine) and i-Pr-PNP (2,6-bis(di-iso-propylphosphinomethyl)pyridine), respectively. Complexes 1 and 3 were characterized by X-ray diffraction and elemental analyses. In both structures the Fe(II) centers exhibit a distorted square pyramidal geometry comprising two chloride ligands and one tridentate PNN or PNP ligand. The magnetic properties of the paramagnetic complexes 1-4 are discussed.

AB - Reaction of the PNN ligand ((2-(di-tert-butylphosphinomethyl)-6- diethylaminomethyl)pyridine) with 1 equiv. of anhydrous FeCl2 in THF results in the formation of (PNN)FeCl2 (1). The cationic complex [(PNN)Fe(THF)Cl](PF6) (2) was obtained by chloride abstraction from 1 with 1 equiv. of TlPF6. Similarly, the PNP-type complexes 3 and 4 were obtained from FeCl2 with 1 equiv. of t-Bu-PNP (2,6-bis(di-tert-butylphosphinomethyl)pyridine) and i-Pr-PNP (2,6-bis(di-iso-propylphosphinomethyl)pyridine), respectively. Complexes 1 and 3 were characterized by X-ray diffraction and elemental analyses. In both structures the Fe(II) centers exhibit a distorted square pyramidal geometry comprising two chloride ligands and one tridentate PNN or PNP ligand. The magnetic properties of the paramagnetic complexes 1-4 are discussed.

KW - Iron complexes

KW - Magnetic properties

KW - Paramagnetic

KW - PNN ligand

KW - PNP ligand

KW - X-ray crystal structures

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10.1016/j.ica.2005.11.039