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[Hg 4 Te 8 (Te 2 ) 4 ] 8− : A Heavy Metal Porphyrinoid Embedded in a Lamellar Structure
Author(s) -
Donsbach Carsten,
Reiter Kevin,
Sundholm Dage,
Weigend Florian,
Dehnen Stefanie
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.201803233
Subject(s) - lamellar structure , aromaticity , porphyrin , crystallography , pyrrole , ionic bonding , crystal structure , metal , ring (chemistry) , chemistry , materials science , molecule , ion , photochemistry , organic chemistry
The use of ionic liquids (C n C 1 Im)[BF 4 ] with long alkyl chains ( n =10, 12) in the ionothermal treatment of Na 2 [HgTe 2 ] led to lamellar crystal structures with molecular macrocyclic anions [Hg 8 Te 16 ] 8− ( 1 ), the heaviest known topological relative of porphyrin. [Hg 8 Te 16 ] 8− differs from porphyrin by the absence of an electronic π‐system, which prevents a “global” aromaticity. Quantum chemical studies reveal instead small ring currents in the pyrrole‐type five‐membered rings that indicate weak local (σ) aromaticity. As a result of their lamellar nature, the compounds are promising candidates for the formation of sheets containing chalcogenidometalate anions.