Synthesis and Reactivity of Multiple PR2-Functionalized Nonagermanide Clusters.

Synthesis and Reactivity of Multiple PR2-Functionalized Nonagermanide Clusters.
Angew Chem Int Ed Engl. 2018 Jul 12;:
Authors: Geitner FS, Klein W, Fässler TF
Abstract
Herein we report on the synthesis of the first multiple phosphine-substituted nonagermanide clusters in a one-step reaction from K4Ge9. Their reactions towards various transition metal complexes show a large variety of reactive sites. The novel threefold phosphine-functionalized [Ge9] clusters [Ge9{PRRI}3]- {R: NiPr2; RI: NiPr2 (1a) or tBu (2a)} are obtained by reaction of pristine [Ge9]4- clusters with the respective chlorophosphines. Subsequent reactions with NHCDippCuCl yield neutral compounds (NHCDippCu)[Ge9{P(NiPr2)2}3] (3) and (NHCDippCu)[Ge9{P(NiPr2)tBu}3] (4), respectively. The reaction of neutral compound 3 with Cr(CO)5(thf) yields the first uncharged fivefold substituted [Ge9] cluster (NHCDippCu)2[Ge9{P(NiPr2)2}2Cr(CO)5] (5) via a ligand exchange reaction at the [Ge9] cluster core. Compounds 3 and 5 are characterized by single crystal structure determination.
PMID: 29998525 [PubMed - as supplied by publisher]

Source: Angewandte Chemie - July 12, 2018 Category: Chemistry Authors: Geitner FS, Klein W, Fässler TF Tags: Angew Chem Int Ed Engl Source Type: research