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Liquid‐crystalline Compounds, 86. The First Disc‐Shaped Dinuclear Platinum Mesogen
Author(s) -
Praefcke Klaus,
Bilgin Belkiz,
Pickardt Joachim,
Borowski Marina
Publication year - 1994
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19941270832
Subject(s) - mesogen , chemistry , mesophase , platinum , liquid crystal , crystallography , discotic liquid crystal , columnar phase , imine , phase (matter) , stereochemistry , liquid crystalline , molecule , organic chemistry , catalysis , physics , optics
The cycloplatination of the tetrasubstituted imine 1 leads to the diplatinum organyl 3 as the main reaction product, which represents the first example of a new class of metallomesogens exhibiting monotropically a nematic‐discotic phase. An X‐ray crystal structure of this anti ‐isomer 3 has been performed. Furthermore, this platinomesogen also shows the induction of a hexagonal columnar mesophase (D ho ) on doping with 2,4,7‐trinitrofluorenone as an electron acceptor. Compared to the analogous palladomesogen the two mesophases observed are more stable in the case of the platinum liquid crystal.