A Digermanium(III) 1,2-Dication Stabilized by Amidinate and cAAC-Phosphinidenide Ligands

Rahul Kumar Siwatch; Ming-Chung Yang; Ming-Der Su; Cheuk-Wai So

doi:10.1021/acs.inorgchem.4c00471

A Digermanium(III) 1,2-Dication Stabilized by Amidinate and cAAC-Phosphinidenide Ligands

Inorg Chem. 2024 May 13;63(19):8511-8515. doi: 10.1021/acs.inorgchem.4c00471. Epub 2024 Apr 30.

Authors

Rahul Kumar Siwatch¹, Ming-Chung Yang², Ming-Der Su^{2

3}, Cheuk-Wai So¹

Affiliations

¹ School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore 637371 Singapore.
² Department of Applied Chemistry, National Chiayi University, Chiayi 60004, Taiwan.
³ Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 80708, Taiwan.

PMID: 38687917
DOI: 10.1021/acs.inorgchem.4c00471

Abstract

A digermanium(III) 1,2-dication comprises two cationic centers located at two interconnected Ge atoms. The strong Coulombic repulsion between two positively charged germanium cations hinders their bond formation. Balancing these two oppositions was achieved by using amidinate and cyclic (alkyl)amino carbene (cAAC)-phosphinidenide ligands, where an amidinato cAAC-phosphinidenidogermylene complex, [LGeP(cAAC_Me)] (2, where L = PhC(NtBu)₂, cAAC_Me = :C{C(Me)₂CH₂C(Me)₂NAr}, and Ar = 2,6-iPr₂C₆H₃), underwent one-electron oxidation with a bis(phosphinidene) radical cation, [(cAAC_Me)P]₂^•+, to form a digermanium(III) 1,2-dication, [LGeP(cAAC_Me)]₂²⁺, in compound 4.