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Synthesis and Reactivity of Multiple Phosphine‐Functionalized Nonagermanide Clusters
Author(s) -
Geitner Felix S.,
Klein Wilhelm,
Fässler Thomas F.
Publication year - 2018
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201803476
Subject(s) - phosphine , reactivity (psychology) , chemistry , cluster (spacecraft) , yield (engineering) , ligand (biochemistry) , transition metal , metal , crystallography , medicinal chemistry , crystal structure , stereochemistry , catalysis , materials science , organic chemistry , medicine , biochemistry , alternative medicine , receptor , pathology , computer science , metallurgy , programming language
Herein we report on the synthesis of the first multiple phosphine‐substituted nonagermanide clusters in a one‐step reaction from K 4 Ge 9 . Their reactions towards various transition metal complexes show a large variety of reactive sites. The novel threefold phosphine‐functionalized [Ge 9 ] clusters [Ge 9 {PRR I } 3 ] − {R: N i Pr 2 ; R I : N i Pr 2 ( 1 a ) or t Bu ( 2 a )} are obtained by reaction of pristine [Ge 9 ] 4− clusters with the respective chlorophosphines. Subsequent reactions with NHC Dipp CuCl yield neutral compounds (NHC Dipp Cu)[Ge 9 {P(N i Pr 2 ) 2 } 3 ] ( 3 ) and (NHC Dipp Cu)[Ge 9 {P(N i Pr 2 ) t Bu} 3 ] ( 4 ), respectively. The reaction of neutral compound 3 with Cr(CO) 5 (thf) yields the first uncharged fivefold substituted [Ge 9 ] cluster (NHC Dipp Cu) 2 [Ge 9 {P(N i Pr 2 ) 2 } 2 Cr(CO) 5 ] ( 5 ) via a ligand exchange reaction at the [Ge 9 ] cluster core. Compounds 3 and 5 are characterized by single crystal structure determination.