Structural Elucidation of (Silica)-O-Rh(allyl)2 by Correlated 1H and 13C NMR

H. Eric Fischer, Steven A. King, C. E. Bronnimann, Jeffrey Schwartz

Research output: Contribution to journalLetter

11 Scopus citations

Abstract

The combined rotation and multiple pulse sequence technique was used to obtain 1H NMR spectra of (silica)-O-Rh(allyl)2, a reactive organometallic complex bound in low concentration on the surface of the oxide, and a model compound, [(η3-allyl)2RhCl]2. By spectral comparison with the model compound, a bis(η3-allyl)Rh structure seemed possible for the surface-bound complex, but broad line widths precluded a more definite structural assignment. The 13C-labeled complex (η3-allyl)(η3-[13C]allyl)2Rh (in which either terminus of the allyl ligand was labeled) was prepared and deposited on silica. The resulting labeled surface complex was analyzed by both 13C cross-polarization magic angle spinning and the 2D 1H-13C heteronuclear correlation technique. Spectral data were compared with those obtained for [(η3-[13C] allyl)2-RhCl]2 and support the bis(η3-allyl)Rh complex structural assignment for (silica)-O-Rh(allyl)2.

Original languageEnglish (US)
Pages (from-to)391-393
Number of pages3
JournalLangmuir
Volume9
Issue number2
DOIs
StatePublished - Jan 1 1993

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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