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The First Structurally Authenticated σ‐Bonded Organosamarium( II ) Derivative and Its Reaction with Benzophenone
Author(s) -
Clegg William,
Izod Keith,
O'Shaughnessy Paul,
Eaborn Colin,
Smith J. David
Publication year - 1997
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.199728151
Subject(s) - benzophenone , samarium , chemistry , derivative (finance) , medicinal chemistry , stereochemistry , center (category theory) , oxygen atom , ion , photochemistry , crystallography , molecule , organic chemistry , financial economics , economics
The first Sm II C σ bonds to be verified by X‐ray structure analysis are 2.787(5) and 2.845(5) Å in length. These distances were obtained for a samarium( II ) complex in which two C(SiMe 3 ) 2 (SiMe 2 OMe) ligands are each bound to the samarium center through the carbanionic carbon center and the oxygen atom of the methoxy group (see structure depicted on the right). This compound reacts with benzophenone to give the corresponding samarium( III ) ketal radical anion complex.