• Designing M-bond (X-M...Y, M 5 transition metal): r-hole and radial density distribution

    • Fulltext


        Click here to view fulltext PDF

      Permanent link:

    • Keywords


      Weak interactions; H-Bond; M-Bond; sigma-hole; MESP; radial density distribution

    • Abstract


      Following the ubiquitous H-bond, there is a growing interest in weak non-covalent interactions involving other elements, viz., the Z-bonds (X-Z...Y, Z = halogens, chalcogens, etc.). Although almost all the main group elements can act as Z bond donors, the search for a similar role for transition metals in X-M...Y,(M = transition metal) interaction, called the Metal-bond, is still in its infancy. This article summarizes our attempts to understand the participation of transition metal elements as electron acceptors in a weak interaction with electron-rich species Y. Cambridge Structural Database analysis revealed that except Group 11and 12 transition metal complexes (Type-II), electron-saturated (18 electron) metal complexes having partly filled d orbitals (Group 3–10; Type-I) hesitate to form Metal-bonds. This is attributed to the partial r-hole screening by core electron density and diminished stabilization from charge polarization in Type I complexes. We also show that Type-I complexes could be forced to form Metal-bonds by employing extreme ligand conditions, thereby opening new areas of research where Metal-bonds can act as emerging non-covalent interaction in designing supramolecular architectures

    • Author Affiliations



      1. Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560 012, Karnataka, India
      2. Institute of Chemistry, The Hebrew University, 91904 Jerusalem, Israel
    • Dates

  • Journal of Chemical Sciences | News

© 2021-2022 Indian Academy of Sciences, Bengaluru.