3 years ago

Synthesis of Zintl Triads Comprising Extended Conjugated π-Electronic Systems: [RGe9–CHCH–CHCH–Ge9R]4– (R = −CHCH2, −C(CH3)CH–CHN(CH2)2NH2)

Synthesis of Zintl Triads Comprising Extended Conjugated π-Electronic Systems: [RGe9–CHCH–CHCH–Ge9R]4– (R = −CHCH2, −C(CH3)CH–CHN(CH2)2NH2)
Thomas F. Fässler, Wilhelm Klein, Sabine Frischhut, Manuel M. Bentlohner
Extending the electron system of Zintl clusters. Homoatomic deltahedral tetrel clusters are stable with various charges. The linking of these clusters with conjugated bridges and an extension of the resulting π-electronic system opens the potential for “Zintl triads” in analogy to the known fullerene-based triads. The attachment of organic tethers and the addition of supplementary functionalities to the two Ge9 Zintl clusters linked by a conjugated organic buta-1,3-diene-1,4-diyl bridge was realized by the reaction of [Ge9]4− with 1,4-bis(trimethylsilyl)butadiyne and bis(trimethylsilyl)acetylene or (3Z/3E)-7-amino-1-(trimethylsilyl)-5-azahepta-3-en-1-yne in ethylenediamine. The products have been characterized by means of single-crystal structure analysis as well as NMR and Raman spectroscopy.

Publisher URL: http://dx.doi.org/10.1021/acs.inorgchem.7b01643

DOI: 10.1021/acs.inorgchem.7b01643

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