Preprints
https://doi.org/10.5194/mr-2024-10
https://doi.org/10.5194/mr-2024-10
05 Jun 2024
 | 05 Jun 2024
Status: a revised version of this preprint was accepted for the journal MR and is expected to appear here in due course.

1H enhanced 103Rh NMR spectroscopy and relaxometry of Rh(acac)3 in solution

Harry Harbor-Collins, Mohamed Sabba, Markus Leutzsch, and Malcolm Harris Levitt

Abstract. Recently-developed polarisation-transfer techniques are applied to the 103Rh NMR of the Rh(acac)3 coordination complex in solution. Four-bond 1H-103Rh J-couplings of around 0.39 Hz are exploited to enhance the 103Rh NMR signal and to estimate the 103Rh T1 and T2 relaxation times as a function of field and temperature. The 103Rh longitudinal T1 relaxation in Rh(acac)3 is shown to be dominated by the spin-rotation mechanism, with an additional field-dependent contribution from the 103Rh chemical shift anisotropy.

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Harry Harbor-Collins, Mohamed Sabba, Markus Leutzsch, and Malcolm Harris Levitt

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on mr-2024-10', Anonymous Referee #1, 22 Jun 2024
    • CC1: 'Reply on RC1', Mohamed Sabba, 24 Jun 2024
  • RC2: 'Comment on mr-2024-10', Anonymous Referee #2, 03 Jul 2024
  • AC1: 'Comment on mr-2024-10', Harry Harbor-Collins, 05 Jul 2024

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on mr-2024-10', Anonymous Referee #1, 22 Jun 2024
    • CC1: 'Reply on RC1', Mohamed Sabba, 24 Jun 2024
  • RC2: 'Comment on mr-2024-10', Anonymous Referee #2, 03 Jul 2024
  • AC1: 'Comment on mr-2024-10', Harry Harbor-Collins, 05 Jul 2024
Harry Harbor-Collins, Mohamed Sabba, Markus Leutzsch, and Malcolm Harris Levitt
Harry Harbor-Collins, Mohamed Sabba, Markus Leutzsch, and Malcolm Harris Levitt

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Short summary
The Nuclear Magnetic Resonance (NMR) spectroscopy of the 103Rh nucleus is onerous owing to its dismal sensitivity. Here, we utilise modern techniques to boost the sensitivity and acquire valuable 103Rh NMR parameters for the Rh(acac)3 transition metal complex. We acquire proton enhanced 103Rh NMR spectra and successfully characterise the 103Rh spin relaxation. In doing so we unveil the secrets of a complex that is of significant interest to the 103Rh NMR and wider chemical community alike.