Abstract
The acetylene hydrido complexes Cp 2 NbH(C 2 R 2 ) (2a, R=Ph, known; 2b, R=SiMe 3 ; 2c, R=Et) were prepared from Cp 2 NbH 3 /RC≡CR by thermal substitution, and 2d (R=Me) was obtained from 2b/MeC≡CMe by a photochemical ligand displacement reaction. The complexes 2 insert acetylenes (as e.g. MeC≡CMe, PhC≡CH, HC≡CCO 2 Me) by a nonmigratory insertion process. Stable insertion products Cp 2 Nb(Me 3 SiC≡CSiMe 3 )(CR 2 =CHR 3 ) (4g, R 2 =CO 2 Me, R 3 =H; 4h, R 2 =COMe, R 3 =H; 4i, R 2 , R 3 =CO 2 Me, E isomer) were obtained from 2b. With less sterically crowded acetylene hydrido compounds 2, insertion is followed by rearrangement to give the novel carbenoid complexes Cp 2 Nb(CR 1 CR 1 CR 2 CHR 3 )
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
