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Bisvinylated [ R –Ge 9 –Ge 9 – R ] 4– Cluster Dimers
Author(s) -
Benda Christian B.,
He Haiyan,
Klein Wilhelm,
Somer Mehmet,
Fässler Thomas F.
Publication year - 2015
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.201500131
Subject(s) - ethylenediamine , chemistry , acetylene , ligand (biochemistry) , crystallography , trimethylsilyl , crystal structure , raman spectroscopy , germanium , liquid ammonia , monomer , cluster (spacecraft) , medicinal chemistry , stereochemistry , ammonia , inorganic chemistry , silicon , organic chemistry , biochemistry , physics , receptor , optics , polymer , programming language , computer science
The syntheses, crystal structures, and NMR and Raman spectroscopic characterization of two compounds with a new member of the organically functionalized dimeric Ge 9 –Ge 9 polyanion [ R –Ge 9 –Ge 9 – R ] 4– with R = CH=CH 2 are presented. [K([2.2.2]crypt)] 4 [(CH 2 =CH)–Ge 9 –Ge 9 –(CH=CH 2 )] · 1.76 en ( 1 ) was synthesized either at elevated temperature by the reaction of K 4 Ge 9 and bis(trimethylsilyl)acetylene in ethylenediamine or at ambient temperature in the presence of Pt(PPh 3 ) 4 . [K(18crown‐6)] 4 [(CH 2 =CH)–Ge 9 –Ge 9 –(CH=CH 2 )] · 4 en ( 2 ) was obtained from the prefabricated monomeric bisvinylated Ge 9 cluster [Ge 9 (CH=CH 2 ) 2 ] 2– and an ethylenediamine solution of the intermetallic compound K 4.79 Co 0.79 Sn 9 . The reductive cleavage of one or two vinyl groups from [Ge 9 (CH=CH 2 ) 2 ] 2– – a prerequisite for the latter reaction – could be shown by reacting a solution of the divinylated [Ge 9 (CH=CH 2 ) 2 ] 2– anion in liquid ammonia with elemental potassium, which resulted in the formation of the ligand‐free Ge 9 4– cluster in the new compound [K 5 (OH)]Ge 9 (NH 3 ) 11 ( 3 ).