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Neue Cyclooctatetraen‐Komplexe des Niobs (1)
Author(s) -
Herberich Gerhard E.,
Englert Ullrich,
Roos Peter
Publication year - 1991
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19911241205
Subject(s) - cyclooctatetraene , chemistry , niobium , ligand (biochemistry) , crystallography , stereochemistry , molecule , organic chemistry , biochemistry , receptor
New Cyclooctatetraene Complexes of Niobium [1] The (butadiene)niobium complexes Cp′Nb(C 4 H 6 ) 2 and Cp′Nb(C 4 H 6 )(PMe 3 ) 2 (Cp′C 5 H 4 Me) react with cyclooctatetraene (COT) to give Cp′Nb(C 4 H 6 )(COT) ( 2 ), Cp′Nb(COT) 2 ( 3 ), and Cp′Nb(PMe 3 ) 2 (COT) ( 5 ) with fluxional COT ligands. The structure of 3 exhibits a prone ‐η 3 ‐ and a supine ‐η 4 ‐COT ligand which interchange their role at elevated temperature. That of 5 shows a supine η 3 ‐COT ligand.
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