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On the Affinity between Fullerenes and Deltahedral Zintl Ions: A UV/Vis Spectroscopic Investigation
Author(s) -
Frischhut Sabine,
Machado de Carvalho João G.,
Karttunen Antti J.,
Fässler Thomas F.
Publication year - 2018
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201800293
Subject(s) - crystallography , germanium , ion , cluster (spacecraft) , fullerene , ligand (biochemistry) , chemistry , halide , acetonitrile , alkyl , spectroscopy , silicon , materials science , inorganic chemistry , biochemistry , physics , receptor , organic chemistry , quantum mechanics , computer science , programming language , chromatography
The close relationship of C 60 and deltahedral tetrel element cluster anions has been pointed out before. We report herein on UV/Vis spectra of the Zintl anions and compounds [Ge 9 ] 2– , [(CH 2 =CH) 2 Ge 9 ] 2– , [{(Me 3 Si) 3 Si} 3 Ge 9 ] – , {(Me 3 Si) 3 Si} 3 Ge 9 CH 2 CH 3 , {(Me 3 Si) 3 Si} 3 Ge 9 (CH 2 ) 2 CH 3 , {(Me 3 Si) 3 Si} 3 Ge 9 (CH 2 ) 3 CH=CH 2 , and [{(Me 3 Si) 3 Si} 3 Ge 9 CH 2 CH 3 ]Pt(PPh 3 ). The spectra are compared to those of the C 60 fullerene, which were recorded under the same conditions. The UV/Vis spectrum of pristine [Ge 9 ] 2– resembles that of C 60 and at higher concentration hint at the known trimeric [(Ge 9 ) 3 ] 6– . The influence of ligand substitution at the Ge 9 cluster‐core is highlighted. For this, the synthesis of the specifically functionalized deltahedral Ge 9 clusters {(Me 3 Si) 3 Si} 3 Ge 9 (CH 2 ) 2 CH 3 , {(Me 3 Si) 3 Si} 3 Ge 9 (CH 2 ) 2 CH=CH 2 , and {(Me 3 Si) 3 Si} 3 Ge 9 (CH 2 ) 3 C 6 H 5 are reported for the first time and is achieved by the reaction of K[{(Me 3 Si) 3 Si} 3 Ge 9 ] with the respective alkyl halides in acetonitrile. The newly synthesized products were characterized by NMR spectroscopy.