Nature of the Rh-H2 Bond in a Dihydrogen Complex Stabilized only by Nitrogen Donors. Inelastic Neutron Scattering Study of TpMe2RhH22H2 ) (TpMe2 = Hydrotris(3,5-dimethylpyrazolyl)borate)

Juergen Eckert, Alberto Albinati, Urs E. Bucher, Luigi M. Venanzi

Research output: Contribution to journalArticle

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Abstract

The tunnel splitting of the librational ground state and the torsional frequencies of the dihydrogen ligand in TpMe2:RhH22-H2 ) (TpMe2 = hydrotris(3,5-dimethylpyrazolyl)borate) were measured using inelastic neutron scattering spectroscopy. The barrier for the rotation of the H2 ligand and its H-H separation, calculated from these data, are 0.56(2) kcal/mol and 0.94 Å, respectively. These values indicate that π-back-donation from the TpMe2RhH2 fragment to H2 is relatively weak and/or the interaction between the coordinated dihydrogen molecule and the two cis-hydride ligands significantly lowers the barner for H2 rotation.

Original languageEnglish
Pages (from-to)1292-1294
Number of pages3
JournalInorganic Chemistry
Volume35
Issue number5
DOIs
StatePublished - 1996

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