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 › peer-review

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

Keywords

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

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

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

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, PNN ligand, PNP ligand, Paramagnetic, 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",

year = "2006",

month = apr,

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doi = "10.1016/j.ica.2005.11.039",

language = "English",

volume = "359",

pages = "1955--1960",

journal = "Inorganica Chimica Acta",

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TY - JOUR

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 - PNN ligand

KW - PNP ligand

KW - Paramagnetic

KW - X-ray crystal structures

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