Generation and Reactions of a Benzodehydrotropylium Ion-Co2(CO)6 Complex

Mariam A Mehdi; Eric A C Bushnell; Sahar Nikoo; James W Gauld; James R Green

doi:10.1021/acsomega.9b02390

Generation and Reactions of a Benzodehydrotropylium Ion-Co₂(CO)₆ Complex

ACS Omega. 2019 Oct 28;4(20):18600-18608. doi: 10.1021/acsomega.9b02390. eCollection 2019 Nov 12.

Authors

Mariam A Mehdi¹, Eric A C Bushnell¹, Sahar Nikoo¹, James W Gauld¹, James R Green¹

Affiliation

¹ Department of Chemistry and Biochemistry, University of Windsor, Windsor, Ontario N9B 3P4, Canada.

Abstract

A series of 7-methylenedehydrobenzo[7]annulen-5-ol hexacarbonyldicobalt complexes were generated by Hosomi-Sakurai reactions of allylsilanes containing o-alkynylarylaldehyde-Co₂(CO)₆ complexes. One of the cyclization products was converted into its corresponding dihydrobenzo[7]annulen-7-ol hexacarbonyldicobalt complex, an immediate precursor to a benzodehydrotropylium-Co₂(CO)₆. The cation was generated in situ and reacted with four nucleophiles, and its aromatic stabilization was determined by computational methods.