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Title: Methods for preparation of cyclopentadienyliron (II) arenes

Abstract

Two improved methods for preparation of compounds with the structure shown in the equation, [(Cp)--Fe--(Ar)][sup +][sub b]X[sup b[minus]], where Cp is an [eta][sup 5] complexed, substituted or unsubstituted, cyclopentadienyl or indenyl anion, Ar is an [eta][sup 6] complexed substituted or unsubstituted, [pi]-arene ligand and X is a bivalent anion where b is an integer between 1 and 3. The two methods, which differ in the source of the cyclopentadienyl anion--Lewis acid complex, utilize a Lewis acid assisted ligand transfer reaction. The cyclopentadienyl anion ligand, assisted by a Lewis acid is transferred to ferrous ion in the presence of an arene. In the first method, the cyclopentadienyl anion is derived from ferrocene and ferrous chloride. In this reaction, the cyclopentadienyliron (II) arene product is derived partially from ferrocene and partially from the ferrous salt. In the second method, the cyclopentadienyl anion--Lewis acid complex is formed by direct reaction of the Lewis acid with an inorganic cyclopentadienide salt. The cyclopentadienyliron (II) arene product of this reaction is derived entirely from the ferrous salt. Cyclopentadienyliron (II) arene cations are of great interest due to their utility as photoactivatable catalysts for a variety of polymerization reactions.

Inventors:
Issue Date:
Research Org.:
3M CO
OSTI Identifier:
7027883
Patent Number(s):
5059701 A
Application Number:
PPN: US 7-585865
Assignee:
Minnesota Mining and Manufacturing Company, St. Paul, MN (United States) ALO; EDB-94-110993
DOE Contract Number:  
AC07-88ID12692
Resource Type:
Patent
Resource Relation:
Patent File Date: 20 Sep 1990
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; CATALYSTS; CHEMICAL PREPARATION; IRON COMPLEXES; ORGANOMETALLIC COMPOUNDS; MOLECULAR STRUCTURE; PHOTOCHEMICAL REACTIONS; PRECURSOR; CHEMICAL REACTIONS; COMPLEXES; ORGANIC COMPOUNDS; SYNTHESIS; TRANSITION ELEMENT COMPLEXES; 400201* - Chemical & Physicochemical Properties; 400500 - Photochemistry

Citation Formats

Keipert, S.J. Methods for preparation of cyclopentadienyliron (II) arenes. United States: N. p., 1991. Web.
Keipert, S.J. Methods for preparation of cyclopentadienyliron (II) arenes. United States.
Keipert, S.J. Tue . "Methods for preparation of cyclopentadienyliron (II) arenes". United States.
@article{osti_7027883,
title = {Methods for preparation of cyclopentadienyliron (II) arenes},
author = {Keipert, S.J.},
abstractNote = {Two improved methods for preparation of compounds with the structure shown in the equation, [(Cp)--Fe--(Ar)][sup +][sub b]X[sup b[minus]], where Cp is an [eta][sup 5] complexed, substituted or unsubstituted, cyclopentadienyl or indenyl anion, Ar is an [eta][sup 6] complexed substituted or unsubstituted, [pi]-arene ligand and X is a bivalent anion where b is an integer between 1 and 3. The two methods, which differ in the source of the cyclopentadienyl anion--Lewis acid complex, utilize a Lewis acid assisted ligand transfer reaction. The cyclopentadienyl anion ligand, assisted by a Lewis acid is transferred to ferrous ion in the presence of an arene. In the first method, the cyclopentadienyl anion is derived from ferrocene and ferrous chloride. In this reaction, the cyclopentadienyliron (II) arene product is derived partially from ferrocene and partially from the ferrous salt. In the second method, the cyclopentadienyl anion--Lewis acid complex is formed by direct reaction of the Lewis acid with an inorganic cyclopentadienide salt. The cyclopentadienyliron (II) arene product of this reaction is derived entirely from the ferrous salt. Cyclopentadienyliron (II) arene cations are of great interest due to their utility as photoactivatable catalysts for a variety of polymerization reactions.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1991},
month = {10}
}