The effects of bulky ortho-aryl substituents in corroles, tested by x-ray crystallography of the rhodium complexes and catalysis thereby

Liliya Simkhovich, Israel Goldberg, Zeev Gross

Research output: Contribution to journalArticlepeer-review

Abstract

In the present publication we report on the preparation and spectroscopic features of a penta-coordinate rhodium(III) complex of corrole with bulky ortho-phenyl substituents at the meso positions, Rh(tdcc)(PPh3) [tdcc = tris(2,6-dichlorophenyl)corrole]. Addition of pyridine to Rh(tdcc)(PPh3), as well as to the closely related complex of tris(pentafluorophenyl)corrole [Rh(tpfc)(PPh3)] reported earlier, leads to hexa-coordinated rhodium complexes with pyridine and PPh3 occupying the axial positions. The structures of these two compounds were investigated by NMR and x-ray crystallography. The catalytic potency of Rh(tdcc)(PPh3) was found significantly lower than that of Rh(tpfc)(PPh3), which suggests that excess steric crowding prevents efficient carbene-transfer catalysis.

Original languageEnglish
Pages (from-to)439-444
Number of pages6
JournalJournal of Porphyrins and Phthalocyanines
Volume6
Issue number6
DOIs
StatePublished - 2002
Externally publishedYes

Keywords

  • Catalytic potency
  • Corroles
  • Hexa-coordinated complexes
  • X-ray crystallography

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