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Ge II and Sn II Complexes of [2.2.2]Paracyclophane with Threefold Internal η 6 Coordination
Author(s) -
Probst Thomas,
Steigelmann Oliver,
Riede Jürgen,
Schmiclbaur Hubert
Publication year - 1990
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.199013971
Subject(s) - crystallography , tin , counterion , chemistry , metal , atom (system on chip) , trigonal crystal system , ion , stereochemistry , crystal structure , computer science , organic chemistry , embedded system
Sn II is significantly more tightly bound than Ge II in the cavity of the [2.2.2]paracyclophane(L), as shown by the structure analyses of the complex cations [LSn(AlCl 4 )] ⊕ and [LGeCl] ⊕ 1 . In the tin complex the AlCl 4 ⊕counterion is loosely coordinated via a Cl atom to the metal (Sn‐Cl 3.073 Å) and thus hardly disturbs the expected trigonal‐planar coordination, whereas the strong GeCl bond (GeCl 2.224 Å) in 1 leads to a weakening of the Ge‐arene interaction and to a preferential tetrahedral environment for the metal.