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Tetra‐ and Pentacyclopropylcyclopentadiene—Two New Donor‐Substituted Ligands for Metal Complexes
Author(s) -
Emme Ingo,
Redlich Stefan,
Labahn Thomas,
Magull Jörg,
de Meijere Armin
Publication year - 2002
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/1521-3773(20020301)41:5<786::aid-anie786>3.0.co;2-7
Subject(s) - tetra , formate , ring (chemistry) , chemistry , metal , core (optical fiber) , center (category theory) , work (physics) , stereochemistry , medicinal chemistry , combinatorial chemistry , organic chemistry , computer science , crystallography , catalysis , engineering , telecommunications , mechanical engineering
Accessible in one step each , tetra‐ and pentacyclopropylcyclopentadiene ( 3 ) can be prepared from dicyclopropylacetylene ( 1 ) and n ‐butyl formate ( 2 a ) or methyl cyclopropanecarboxylate ( 2 b ), respectively. The five cyclopropyl substituents in 3 b exert a significant donor effect on the cyclopentadienide core when this is bound to a metal center such as in 4 .