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The Formation of Heteroleptic Carbene Homologues by Ligand Exchange— Synthesis of the First Plumbanediyl Dimer
Author(s) -
Klinkhammer Karl W.,
Fässler Thomas F.,
Grützmacher Hansjörg
Publication year - 1998
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/(sici)1521-3773(19980202)37:1/2<124::aid-anie124>3.0.co;2-c
Subject(s) - carbene , dimer , monomer , ligand (biochemistry) , chemistry , double bond , bent molecular geometry , stereochemistry , crystallography , catalysis , polymer chemistry , organic chemistry , receptor , polymer , biochemistry
Double bond—yes or no? The centrosymmetic trans ‐bent dimers 1 and 2 crystallize from a mixture of the corresponding monomeric carbene analogues R f 2 Sn/Sn(SiR 3 ) 2 or R f 2 Sn/Pb(SiR 3 ) 2 . The question whether the plumbanediyl dimer 2 contains a double bond and therefore becomes the last member of the series of ethene homologues R 4 E 2 (E = Si, Ge, Pb) remains open. R = SiMe 3 , R f = 2,4,6‐(CF 3 ) 3 C 6 H 2 .