Details

Autor(en) / Beteiligte

• Scherer, Wolfgang
• Dunbar, Andrew C.
• Barquera-Lozada, José E.
• Schmitz, Dominik
• Eickerling, Georg
• Kratzert, Daniel
• Stalke, Dietmar
• Lanza, Arianna
• Macchi, Piero
• Casati, Nicola P. M.
• Ebad-Allah, Jihaan
• Kuntscher, Christine

Titel

Anagostic Interactions under Pressure: Attractive or Repulsive?

Ist Teil von

• Angewandte Chemie (International ed.), 2015-02, Vol.54 (8), p.2505-2509

Auflage

International ed. in English

Ort / Verlag

Weinheim: WILEY-VCH Verlag

Erscheinungsjahr

2015

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Square‐planar d8‐ML4 complexes might display subtle but noticeable local Lewis acidic sites in axial direction in the valence shell of the metal atom. These sites of local charge depletion provide the electronic prerequisites to establish weakly attractive 3c–2e M⋅⋅⋅HC agostic interactions, in contrast to earlier assumptions. Furthermore, we show that the use of the sign of the 1H NMR shifts as major criterion to classify M⋅⋅⋅HC interactions as attractive (agostic) or repulsive (anagostic) can be dubious. We therefore suggest a new characterization method to probe the response of these M⋅⋅⋅HC interactions under pressure by combined high pressure IR and diffraction studies. Weakly attractive 3c–2e M⋅⋅⋅HC agostic interactions can be established in square‐planar d8‐ML4 complexes. A new characterization method is used to probe these interactions under pressure by combined high‐pressure IR and X‐ray diffraction studies. The use of the sign of 1H NMR shifts as major criterion to classify M⋅⋅⋅HC interactions as attractive (agostic) or repulsive (anagostic) is called into question.