A Metal‐Containing N‐Heterocyclic Germylene Based on an Oxalamidine Framework

Abstract

A metal-containing N-heterocyclic germylene based on a N-mesityl (Mes)-substituted oxalamidine framework is reported. The precursor (MesN=) 2 C-C(-N(H)Mes) 2 (1H 2 ) was converted into its rhodium complex [Rh(κ 2 N-1H 2 )(cod)][OTf] (2) (cod = 1,5-cyclooctadiene; OTf = triflate) in 62 % isolated yield. Subsequent reaction of 2 with Ge{N(SiMe 3 ) 2 } 2 gave the crystalline N-heterocyclic germylene [Rh(cod)(μ-1)Ge] [OTf] (3) in 50 % yield. The compounds under study were fully characterized by various methods, also including X-ray crystallographic studies on single crystals of 2 and 3. Density func-* Prof. Dr. F. Breher E-Mail: breher@kit.edu [a] Scheme 1. Selected metal-containing germylenes from the literature (R = Mes, Neopentyl, etc., Dip = 2,6-iPr 2 C 6 H 3 ; Dtp = 3,5-tBu 2 C 6 H 3 ).

An α-diiminato germylene family: syntheses, structures, and reactivity towards C–C coupled digermylene and digermylene oxide

“…The cationic germylene G–Ge with unusual delocalization in the electronic properties was reported in 2018. 33 In this complex, the delocalized bidirectional α-diiminate ligand G is able to provide positive charge transfer between metal centers. This electronic behavior is somewhat like the donor–acceptor properties of the zwitterionic germylene H , which was described in 2006.…”