biostudies-literatureGarcon MEuropean Research Council“la Caixa” FoundationAustralian Nuclear Science and Technology OrganisationRoyal Societyla Caixa Foundatione202211948https://www.ebi.ac.uk/biostudies/studies/S-EPMC9828084biostudies-literatureUnknown61(44)New heterometallic hydride complexes that involve the addition of {Mg-H} and {Zn-H} bonds to group 10 transition metals (Pd, Pt) are reported. The side-on coordination of a single {Mg-H} to Pd forms a well-defined σ-complex. In contrast, addition of three {Mg-H} or {Zn-H} bonds to Pd or Pt results in the formation of planar complexes with subtly different geometries. We compare their structures through experiment (X-ray diffraction, neutron diffraction, multinuclear NMR), computational methods (DFT, QTAIM, NCIPlot), and theoretical analysis (MO diagram, Walsh diagram). These species can be described as snapshots along a continuum of bonding between ideal trigonal planar and hexagonal planar geometries.Angewandte Chemie (International ed. in English)The Continuum Between Hexagonal Planar and Trigonal Planar Geometries.PMC9828084P6932 and DB8477LCF/BQ/EU19/11710077677367UF090149Sackman GAPhanopoulos ARichardson CGarcon MCrimmin MRWhite AJPCooper RIEdwards AJfalseThe Continuum Between Hexagonal Planar and Trigonal Planar Geometries.New heterometallic hydride complexes that involve the addition of {Mg-H} and {Zn-H} bonds to group 10 transition metals (Pd, Pt) are reported. The side-on coordination of a single {Mg-H} to Pd forms a well-defined σ-complex. In contrast, addition of three {Mg-H} or {Zn-H} bonds to Pd or Pt results in the formation of planar complexes with subtly different geometries. We compare their structures through experiment (X-ray diffraction, neutron diffraction, multinuclear NMR), computational methods (DFT, QTAIM, NCIPlot), and theoretical analysis (MO diagram, Walsh diagram). These species can be described as snapshots along a continuum of bonding between ideal trigonal planar and hexagonal planar geometries.2022-01-01T00:00:00Z2022 Nov2025-04-21T14:06:07.177Z2025-04-21T14:06:07.177ZS-EPMC98280843609474410.1002/anie.202211948