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Highly Soluble Supertetrahedra upon Selective Partial Butylation of Chalcogenido Metalate Clusters in Ionic Liquids
Author(s) -
Peters Bertram,
Stuhrmann Gina,
Mack Fabian,
Weigend Florian,
Dehnen Stefanie
Publication year - 2021
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.202104867
Subject(s) - solubility , chemistry , ionic bonding , cluster (spacecraft) , ligand (biochemistry) , absorption (acoustics) , absorption spectroscopy , inorganic chemistry , ion , organic chemistry , materials science , biochemistry , receptor , physics , quantum mechanics , computer science , composite material , programming language
Abstract Supertetrahedral clusters have been reported in two generally different types so far: one type possessing an organic ligand shell, no or low charges, and high solubility, while the other cluster type is ligand‐free with usually high charges and low or no solubility in common solvents. The latter is a tremendous disadvantage regarding further use of the clusters in solution. However, as organic substituents usually broaden the HOMO–LUMO gaps, which cannot be overcompensated by the (limited) cluster sizes, a full organic shielding comes along with drawbacks regarding opto‐electronic properties. We therefore sought to find a way of generating soluble clusters with a minimum number of organic substituents. Here, we present the synthesis and full characterization of two salts of [Sn 10 O 4 S 16 (SBu) 4 ] 4− that are high soluble in CH 2 Cl 2 or CH 3 CN, which includes first NMR and mass spectra obtained from solutions of such salts with mostly inorganic supertetrahedral clusters. The optical absorption properties of this new class of compounds indicates nearly unaffected band gaps. The synthetic approach and the spectroscopic findings were rationalized and explained by means of high‐level quantum chemical studies.