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Trovacenchemie. 13 [1] Weg und Irrweg zu Di([5]trovacenyl)keton
Author(s) -
Elschenbroich Christoph,
Plackmeyer Jörn,
Harms Klaus,
Burghaus Olaf,
Pebler Jürgen
Publication year - 2006
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200500441
Subject(s) - chemistry , electron paramagnetic resonance , cyclic voltammetry , ketone , crystallography , benzene , medicinal chemistry , stereochemistry , electrochemistry , organic chemistry , nuclear magnetic resonance , physics , electrode
Trovacene Chemistry. 13 [1] On Being Lead and Mislead in the Synthesis of Di([5]trovacenyl)ketone Di([5]trovacenyl)ketone ( 3¨ ) has been prepared from lithio‐[5]trovacene and dimethylcarbamoyl chloride and studied by X‐ray diffraction, cyclic voltammetry, magnetic susceptometry and EPR spectroscopy. Slight variation of the synthetic protocol affords an unusual trinuclear complex 5 ⃛ that is also fully characterized. Spin‐spin exchange interaction is smaller in 3¨ than in 1,1‐di([5]trovacenylethene ( 2¨ ), which differs from 3¨ by a replacement of O for CH 2 . The novel trinuclear complex 5 ⃛ , however, displays exchange coupling very similar to that observed in 1‐methoxy‐2,5,6‐tri([5]trovacenyl)benzene ( 7 ⃛ ). In both cases, an unsymmetrical triangular arrangement of S = 1/2 centers is encountered. These findings are discussed in terms of the nature of the respective spacers.