Post-Synthetic Modification of a Porous Hydrocarbon Cage to Give a Discrete Co24 Organometallic Complex

Chriso M Thomas; Weibin Liang; Dan Preston; Christian J Doonan; Nicholas G White

doi:10.1002/chem.202200958

Post-Synthetic Modification of a Porous Hydrocarbon Cage to Give a Discrete Co₂₄ Organometallic Complex

Chemistry. 2022 Sep 12;28(51):e202200958. doi: 10.1002/chem.202200958. Epub 2022 Jul 21.

Authors

Chriso M Thomas¹, Weibin Liang², Dan Preston¹, Christian J Doonan², Nicholas G White¹

Affiliations

¹ Research School of Chemistry, The Australian National University, Canberra, ACT, Australia.
² Department of Chemistry and Centre for Advanced Materials, The University of Adelaide, SA, Australia.

Abstract

A new alkyne-based hydrocarbon cage was synthesized in high overall yield using alkyne-alkyne coupling in the cage forming step. The cage is porous and displays a moderately high BET surface area (546 m² g^-1 ). The cage loses crystallinity on activation and thus is porous in its amorphous form, while very similar cages have been either non-porous, or retained crystallinity on activation. Reaction of the cage with Co₂ (CO)₈ results in exhaustive metalation of its 12 alkyne groups to give the Co₂₄ (CO)₇₂ adduct of the cage in good yield.

Keywords: alkynes; cages; cobalt; porosity; post-synthetic modification.

Grants and funding

FT210100495/Australian Research Council