Controlled Introduction of Functional Groups at One P Atom in [Cp*Fe(-P)] and Release of Functionalised Phosphines

Overview

Journal Chem Sci

Publisher Royal Society of Chemistry

Specialty Chemistry

Date 2023 Jul 7

PMID 37416701

Authors

Stephan Reichl

Felix Riedlberger

Martin Piesch

Gabor Balazs

Michael Seidl

Manfred Scheer

Affiliations

Soon will be listed here.

Abstract

By salt metathesis reactions of the anionic complexes of the type [Cp*Fe(-PR)] (R = Bu (1a), Me (1b), -C[triple bond, length as m-dash]CPh (1c); Cp* = 1,2,3,4,5-pentamethylcyclopentadienyl) with organic electrophiles (XR; X = halogen; R = (CH)Br, (CH)Br, Me) a variety of organo-substituted polyphosphorus ligand complexes of the type [Cp*Fe(-PRR)] (2) are obtained. Thereby, organic substituents with different functional groups (FG), such as halogens or nitriles, are introduced. In [Cp*Fe(-PRR')] (2a: R = Bu, R' = (CH)Br), the bromine substituent can be easily substituted, leading to functionalized complexes [{Cp*Fe(-PBu)}(CH){Cp*Fe(-PMe)}] (4) and [Cp*Fe(-PRR')] (5) (R = Bu, R' = (CH)PPh) or by abstraction of a phosphine to the asymmetric substituted phosphine Bu(Bn)P(CH)Bn (6). The reaction of the dianionic species [K(dme)][Cp*Fe(-P)] (I') with bromo-nitriles leads to [Cp*Fe{-P((CH)CN)}] (7), allowing the introduction of two functional groups attached to one phosphorus atom. 7 reacts with ZnBr in a self-assembly reaction to form the supramolecular compound [Cp*Fe{-P((CH)CN)}ZnBr] (8).

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