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Structure and Characterization of CI 3 + [Al{OC(CF 3 ) 3 } 4 ] − ; Lewis Acidities of CX 3 + and BX 3
Author(s) -
Krossing Ingo,
Bihlmeier Angela,
Raabe Ines,
Trapp Nils
Publication year - 2003
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.200250172
Subject(s) - chemistry , halide , boron , crystallography , lewis acids and bases , ion , fluoride , resonance (particle physics) , inorganic chemistry , analytical chemistry (journal) , atomic physics , physics , organic chemistry , catalysis
Where is the charge? The positive charge of the CI 3 + ion in CI 3 + [Al{OC(CF 3 ) 3 } 4 ] − is located exclusively on the I atoms (see resonance structures B – D ), and not on the formal carbenium center A . According to calculations and experimental findings, the Lewis acidity of the CX 3 + homologues (X=F–I) versus fluoride is reversed in comparison to that of the isoelectronic boron halides BX 3 , and decreases from CF 3 + to CI 3 + .