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Australian Journal of Chemistry Australian Journal of Chemistry Society
An international journal for chemical science
RESEARCH ARTICLE

Structure and Bonding in Hexa-tert-butyl-hexa-peri-hexabenzocoronene Sandwich Complexes of Ruthenium*

Matthias Lein
+ Author Affiliations
- Author Affiliations

School of Chemical and Physical Sciences (SCPS), Victoria University of Wellington, Kelburn, Wellington 6012, New Zealand, and Centre for Theoretical Chemistry and Physics (CTCP), New Zealand Institute for Advanced Study, Massey University, Palmerston North, Auckland 4442, New Zealand. Email: matthias.lein@vuw.ac.nz

Australian Journal of Chemistry 71(4) 222-226 https://doi.org/10.1071/CH17566
Submitted: 31 October 2017  Accepted: 13 December 2017   Published: 9 January 2018

Abstract

We evaluate the balance of steric and electronic effects in the site selectivity of the binding of [Rh(Me5Cp)]+ ([RhCp·]+) to the three possible coordination sites of the polyaromatic hydrocarbon (PAH) hexa-tert-butyl-hexa-peri-hexabenzocoronene (HBBC). We find that despite the close proximity of sterically demanding tert-butyl groups to the methyl groups of the Cp* ligand, the extent of steric repulsion is minor compared to electronic interaction from bond formation and that the site selectivity is best explained in terms of the electronics of the (poly) aromatic system. This is in contrast to previous investigations on similar systems with a COD ligand where steric influence has been shown to dominate selectivity.


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