Synthesis and exchange reactions of Ni-dimine-COD, acetylene and olefin complexes†
Abstract
The complexes CPh)
CPh) (7) and DippBIANNi(PhC
CPh) (8) are readily prepared by addition of
CPh
CCO2Me) (9) is readily prepared. In a similar fashion, the species DippDADNi(MeCO2C
CCO2Me) (10), DippDABNi(Me3SiC
CSiMe3) (11), DippDABNi(MeCO2C
CCO2Me) (12) and DippBIANNi(MeCO2C
CCO2Me) (13) were prepared. Reactions with olefins afforded DippDABNi(MeCO2CH
CHCO2Me) (14), DippDABNi(MeCO2CH
CHPh) (15). Employing isolated (3) or (15) in exchange reactions afforded (7), (11) (14) and (15). Similarly (6) served as a precursor to (10) while (11) reacts with
CPh