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Five‐Membered Metallacyclic Allenoids: Synthesis and Structure of Remarkably Stable Strongly Distorted Cyclic Allene Derivatives
Author(s) -
Ugolotti Juri,
Dierker Gereon,
Kehr Gerald,
Fröhlich Roland,
Grimme Stefan,
Erker Gerhard
Publication year - 2008
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.200705615
Subject(s) - allene , hydroboration , chemistry , trimethylsilyl , derivative (finance) , transmetalation , yield (engineering) , diene , stereochemistry , medicinal chemistry , organic chemistry , physics , catalysis , economics , financial economics , thermodynamics , natural rubber
Metallocene lends a hand : Treatment of [bis(alkynyl)HfCp 2 ] complexes with HB(C 6 F 5 ) 2 results in 1,1‐hydroboration and subsequent carbon–carbon coupling to yield the corresponding metallacyclopenta‐1,2‐diene derivatives (see structure of the trimethylsilyl derivative; Hf brown, B red, Si blue, F green, C black). X‐ray diffraction and a quantum chemical analysis reveal an electronic structure between a bent cyclic allene and a coordinated butenyne.