The Continuum Between Hexagonal Planar and Trigonal Planar Geometries.

The Continuum Between Hexagonal Planar and Trigonal Planar Geometries.
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DOI:
10.1002/anie.202211948
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发表时间:
2022-11-02
影响因子:
16.6
通讯作者:
Crimmin, Mark R.
Crimmin, Mark R.
中科院分区:
化学1区
文献类型:
--
作者:
Garcon, Marti;Phanopoulos, Andreas;Sackman, George A.;Richardson, Christopher;White, Andrew J. P.;Cooper, Richard, I;Edwards, Alison J.;Crimmin, Mark R.

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本文报道了在第10族过渡金属(Pd,Pt)上引入{Mg-H}和{Zn-H}键的新型氢化物配合物。单个{Mg−H}与Pd的侧配位形成了定义明确的σ-络合物。相反,在Pd或Pt上添加三个{Mg-H}或{Zn-H}键会导致形成具有细微不同几何形状的平面络合物。我们通过实验(X射线衍射、中子衍射、多核NMR)、计算方法(DFT、QTAIM、NCIPlot)和理论分析(MO图、沃尔什图)比较它们的结构。这些物种可以被描述为沿着理想的三角平面和六边形平面几何形状之间的连续键合的快照。对一系列异金属氢化物配合物的分离和成键分析表明,它们具有细微不同的成键几何构型。这些化合物可以被描述为沿着三角形和六边形平面几何结构之间的连续键合的快照。
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. The isolation and bonding analysis of a series of heterometallic hydride complexes shows they have subtly different bonding geometries. These compounds can be described as snapshots along a continuum of bonding between trigonal and hexagonal planar geometries.
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