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Ebbe Nordlander. Portrait.

Ebbe Nordlander

Professor

Ebbe Nordlander. Portrait.

Os-187 subspectra in H-1 and P-31{H-1} spectra of triosmium carbonyl clusters

Author

  • MJ Stchedroff
  • S Aime
  • R Gobetto
  • L Salassa
  • Ebbe Nordlander

Summary, in English

A survey of the use of Os-187 satellite subspectra in H-1 and P-31{H-1} spectra of triosmium carbonyl clusters is reported. By varying evolution delays in HMQC spectra of [Os-3(mu-H)(2)(CO)(10)] we have selectively extracted the values for (1)J(Os,H) and (2)J(Os,H), respectively. An analysis of the principal modes of phosphine coordination in triosmium clusters demonstrates that P-31{H-1} Os-187 satellite subspectra are diagnostic for equatorial coordination [(1)J(Os, P) = 211-223 Hz] or for axial coordination (perpendicular to the plane of the cluster) [(1)J(Os, P) approximate to 147 Hz]. Chelating and bridging diphosphines yield Os-187 satellite subspectra which are the sum of A(2)X and AA'X spin systems. If significant P-P coupling is present, the AA'X component requires simulation. All observed (2)J(Os,P) trans-equatorial couplings fall in the range 38-65 Hz. Copyright (C) 2001 John Wiley Sons, Ltd.

Department/s

  • Department of Chemistry

Publishing year

2002

Language

English

Pages

107-113

Publication/Series

Magnetic Resonance in Chemistry

Volume

40

Issue

2

Document type

Journal article

Publisher

John Wiley & Sons Inc.

Topic

  • Inorganic Chemistry

Keywords

  • constants
  • coupling
  • satellite analysis
  • H-1 NMR
  • P-31 NMR
  • NMR
  • Os-187 NMR
  • triosmium carbonyl clusters

Status

Published

ISBN/ISSN/Other

  • ISSN: 1097-458X