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The Striking Stabilization of Ni 0 (η 6 ‐Arene) Complexes by an Ylide‐Like Silylene Ligand
Author(s) -
Meltzer Antje,
Präsang Carsten,
Milsmann Carsten,
Driess Matthias
Publication year - 2009
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/anie.200900290
Subject(s) - silylene , ligand (biochemistry) , chemistry , ylide , crystallography , stereochemistry , medicinal chemistry , silicon , organic chemistry , biochemistry , receptor
The right mix does the trick : Elusive {Ni 0 (η 6 ‐arene)} moieties can be dramatically stabilized by the N‐heterocyclic silylene ligand 1 , which has a zwitterionic mesomeric structure. The σ, π‐acid–base synergism between nickel and 1 explains the unexpectedly high stability of the new silylene complexes 2 , which enables arene exchange studies at a Ni 0 center. Addition of B(C 6 F 5 ) 3 to 2 affords the zwitterionic silylene complex 3 (see scheme, R=2,6‐ i Pr 2 C 6 H 3 ).