Oligo(metallocene)s Containing Keto-Bridged Phospholyl Rings

A chiral racemic tris(phosphaferrocene) complex showing two bridging keto functionalities has been prepared diastereoselectively through the elaboration of a single 2,5‐diester‐substituted phosphaferrocene. The reaction profile involves the intervention of a single trinuclear complex, which contains...

Full description

Saved in:
Bibliographic Details
Published in:European journal of inorganic chemistry 2014-04, Vol.2014 (10), p.1610-1614
Main Authors: Carmichael, Duncan, le Goff, Xavier-Frédéric, Muller, Eric
Format: Article
Language:English
Subjects:
Arrays
Autotemplation
Bridging
Chemical Sciences
Homology
Ligands
Metallocenes
Oligomers
Other
Pathways
Phosphorus
Ring-opening polymerization
Selectivity
Stereochemistry
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A chiral racemic tris(phosphaferrocene) complex showing two bridging keto functionalities has been prepared diastereoselectively through the elaboration of a single 2,5‐diester‐substituted phosphaferrocene. The reaction profile involves the intervention of a single trinuclear complex, which contains two phosphametallocene units and an η1‐coordinated phospholyl ligand 9, whose organisation determines the stereochemistry of the final product. This complex evolves smoothly to give a chiral triphosphametallocene (±)‐(R*,R*)‐[2,5‐(2′‐CO2Me‐3′,4′‐Me2PC4‐FeCp*)‐(η5‐Me2PC4)FeCp*] 10. The homologation of a 2,5‐diester substituted phosphametallocene into a 2′,5‐diester substituted triphosphametallocene array is presented. The high stereochemical selectivity for the (±)‐(R*,R*) configured triphosphametallocene product is shown to result from an autotemplation of the reaction pathway.
ISSN:1434-1948
1099-0682
DOI:10.1002/ejic.201301144