The cyclo-C3 ligand: Trimetallic cyclopropenium complexes of Group 6-8 metals, including the X-ray crystal structure of [{Fe(CO)2(Cp)}33-C3)][SbF 6]

Michael S. Morton, John P. Selegue

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

Several trimetallic cyclopropenium cations have been prepared via reactions of three equivalents of a metallate anion with [C3Cl3][SbF6]. The X-ray crystal structure of [{Fe(CO)2(Cp)}33-C3)][SbF 6] (1) shows a nearly equilateral C3 ring with an iron center bonded to each vertex. The cyclopropenium complexes [{Ru(CO)2(Cp)}33-C3)][SbF 6] (2), [{Mo(CO)3(Cp)}33-C3)][SbF 6] (3), [{W(CO)3(Cp)}33-C3)][SbF 6] (4), and [{Re(CO)5}33-C3)][SbF 6] (5) were spectroscopically characterized. Because of the 3-fold symmetrical nature of these complexes, their NMR spectra display a single cyclo-C3 ring carbon resonance and a single set of resonances for the metal moiety. Compound 1 reacts with Li[BHEt3] and LiMe to give complex reaction mixtures. We were not able to add a fourth metal center to the C3 ring of 1. The spectroscopically characterized C9 complex [{Fe(CO)2(Cp)}33-C 3(C≡C)3}][SbF6] (6), prepared by the reaction of three equivalents of [Fe(C≡CSiMe3)(CO)2(Cp)] with [C3Cl3][SbF6], was not stable enough to isolate in analytically pure form.

Original languageEnglish
Pages (from-to)133-143
Number of pages11
JournalJournal of Organometallic Chemistry
Volume578
Issue number1-2
DOIs
StatePublished - Apr 22 1999

Bibliographical note

Funding Information:
We thank the Kentucky National Science Foundation EPSCOR program (EPS-9452895) and the U.S. Department of Energy (DE-FG05-85ER13432 and EPSCOR Traineeship DE-FG02-91ER75657) for financial support, the University of Kentucky Major Research Instrumentation Bond Program (ID# 7E-8E48-25) for equipment used in this study, the University of Kentucky Mass Spectrometry Center for mass spectra and Professor Carolyn P. Brock and Michael Lloyd for X-ray crystallographic assistance.

Keywords

  • Carbide
  • Cyclopropenium
  • Iron
  • Molybdenum
  • Rhenium
  • Ruthenium
  • Tungsten

ASJC Scopus subject areas

  • Biochemistry
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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