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Nickel‐catalyzed Cyclotrimerization of Malononitrile: The Dicyanomethanide‐bridged, Anionic Ni II Complex [{Ni(C 5 F 5 ) 2 (μ‐NCCHCN)} 2 ] 2⊖
Author(s) -
López Gregorio,
Sánchez Gregorio,
Garciá Gabriel,
Ruiz José,
García Joaquín,
MartínezRipoll M.,
Vegas A.,
Hermoso Juan A.
Publication year - 1991
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.199107161
Subject(s) - malononitrile , nickel , catalysis , pyridine , chemistry , salt (chemistry) , derivative (finance) , polymer chemistry , ion , medicinal chemistry , organic chemistry , financial economics , economics
A remarkable twelve‐membered heterocycle is present in the title complex anion 1 . It is formed in the reaction of the NBu 4 salt of the corresponding hydroxo‐bridged anion with malonitrile in the molecular ratio 1:2. Catalytic amounts of the Ni compound, on the other hand, effect a cyclotrimerization of the malonitrile, leading to a highly functionalized pyridine derivative.