A sandwich-type cluster containing Ge@Pd3 planar fragment flanked by aromatic nonagermanide caps

Hong-Lei Xu, Nikolay V. Tkachenko, Zi-Chuan Wang, Wei-Xing Chen, Lei Qiao, Alvaro Muñoz-Castro, Alexander I. Boldyrev () and Zhong-Ming Sun ()
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Hong-Lei Xu: Nankai University
Nikolay V. Tkachenko: Utah State University
Zi-Chuan Wang: Nankai University
Wei-Xing Chen: Nankai University
Lei Qiao: Nankai University
Alvaro Muñoz-Castro: Grupo de Química Inorgánicay Materiales Moleculares, Facultad de Ingenieria, Universidad Autonoma de Chile, El Llano Subercaseaux
Alexander I. Boldyrev: Utah State University
Zhong-Ming Sun: Nankai University

Nature Communications, 2020, vol. 11, issue 1, 1-8

Abstract: Abstract Sandwich-type clusters with the planar fragment containing a heterometallic sheet have remained elusive. In this work, we introduce the [K(2,2,2-crypt)]4{(Ge9)2[η6-Ge(PdPPh3)3]} complex that contains a heterometallic sandwich fragment. The title compound is structurally characterized by means of single-crystal X-ray diffraction, which reveals the presence of an unusual heteroatomic metal planar fragment Ge@Pd3. The planar fragment contains a rare formal zerovalent germanium core and a peculiar bonding mode of sp2-Ge@(PdPPh3)3 trigonal planar structure, whereas the nonagermanide fragments act as capping ligands. The chemical bonding pattern of the planar fragment consists of three 2c-2e Pd-Ge σ-bonds attaching Pd atoms to the core Ge atom, while the binding between the planar fragment and the aromatic Ge9 ligands is provided by six 2c-2e Pd-Ge σ-bonds and two delocalized 4c-2e σ-bonds. The synthesized cluster represents a rare example of a sandwich compound with the heteroatomic metal planar fragment and inorganic aromatic capping ligands.

Date: 2020
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DOI: 10.1038/s41467-020-19079-z

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