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References

• Praefcke , K. , Kohne , B. , Marquardt , P. , Luz , Z. and Poupko , R. Liq. Cryst. , in print. 58th contribution on liquid-crystalline compounds; part 57
   Google Scholar
• Demus , D. 1989 . Liq. Cryst. , 5 : 75 see references cited therein
   Web of Science ®Google Scholar
• Chandrasekhar , S. and Ranganath , G. S. 1990 . Rep. Prog. Phys. , 53 : 57 see references cited therein
   Web of Science ®Google Scholar
• Malthěte , J. , Levelut , A.-M. and Nguyen , H. T. 1985 . J. Phys. Lett. , 46 : L-875
   Google Scholar
• Lehn , J. M. , MalthCte , J. and Levelut , A.-M. 1985 . J. Chem. Soc., Chem. Commun. , : 1794
   Google Scholar
• Malthěte , J. and Collet , A. 1985 . Nouv. J. Chem. , 9 : 151
   Google Scholar
• Zimmermann , H. , Poupko , R. , Luz , Z. and Billard , J. 1985 . Z. Naturforsch. , 40a : 149
   Google Scholar
• Praefcke , K. , Kohne , B. , Giindogan , B. , Demus , D. and Diele , S. 1989 . March 15–17 1989 , Freiburg, Germany. Fraunhofer-Institut für Festkcrperphysik . 18. Freiburger Arbeitstagung Flussigkrcstalle D-7800
   Google Scholar
• Praefcke , K. , Kohne , B. , Gündogan , B. , Singer , D. , Demus , D. , Diele , S. , Pelzl , G. and Bakowsky , U. 1990 . April 4–6 1990 . 19. Freiburger Arbeitstagung Fliissigkristalle, contribution 10. With regard to the earlier use of this model of board-like mesogens in cases of polymer liquid crystals see ref. 13b-d. contribution 21
   Google Scholar
• Praefcke , K. , Kohne , B. , Gundogan , B. , Demus , D. , Diele , S. and Pelzi , G. 1990 . Mol. Cryst. Liq. Cryst. Lett. , 7 : 27
   Google Scholar
• Praefcke , K. , Kohne , B. , Sineer , D. , Demus , D. , Pelzl , G. and Diele , S. 1990 . Lia. Crvst. , 7 : 589
   Web of Science ®Google Scholar
• Freiser , M. J. 1970 . Phys. Rev. Lett. , 24 : 1041
   Web of Science ®Google Scholar
• Alben , R. 1973 . J. Chem. Phys. , 59 : 4299
   Web of Science ®Google Scholar
• This is e.g. at present the case in the Sonderforschungsbereich 335 “Anisotrope Fluide” at Technische Universitat Berlin (TUB), Germany, and has
   Google Scholar
• in part been discussed by Prof. A. Saupe in a Workshop on “Order in Fluids” at the TUB and the Wissenschaftskolleg zu Berlin, Germany, in February 21–23, 1990
   Google Scholar
• Baals , D. 1990 . Z. Naturforsch. , 45a : 7 See here also some preparative results given in ref. 8, 9, and 15–17, and furthermore, some theoretical work such as published by
   Google Scholar
• Kini , U. D. and Chandrasekhar , S. 1990 . Mol. Cryst. Liq. Cryst. , : 179 see also ref. 14
   Google Scholar
• Yu , L. Y. and Saupe , A. 1980 . Phys. Rev. Lett. , 45 : 1000
   Web of Science ®Google Scholar
• Hessel , F. and Finkelmann , H. 1986 . Polym. Bull. , 15 : 349
   Web of Science ®Google Scholar
• Hessel , F. , Herr , R.-P. and Finkelmann , H. 1987 . Makromol. Chem. , 188 : 1597
   Web of Science ®Google Scholar
• Ebert , M. , Herrmann-Schönherr , O. , Wendorff , J. H. , Ringsdorf , H. and Tschirner , P. 1988 . Makromol. Chem., Rapid Commun. , 9 : 445
   Google Scholar
• Ballauff , M. 1988 . Angew. Chem. , 100 775 AM
   Google Scholar
• Chandrasekhar , S. 1985 . Mol. Crvst. Lia. Crvst. , 124 : 1
   Web of Science ®Google Scholar
• Praefcke , K. , Kohne , B. , Gutbier , K. , Johnen , N. and Singer , D. 1989 . Liq. Cryst. , 5 : 233
   Web of Science ®Google Scholar
• Malthtte , J. , Liébert , L. , Levelut , A.-M. and Galerne , Y. 1986 . C. R. Acad. Sc. Paris, Ser. II , 303 : 1073
   Google Scholar
• Malthéte , J. , Nguyen , H. T. and Levelut , A.-M. 1986 . J. Chem. Soc., Chem. Commun. , : 1548
   Google Scholar
• Chandrasekhar , S. , Raja , V. N. and Sadashiva , B. K. 1990 . Mol. Cryst. Liy. Cryst. Lett. , 7 : 65 including references of this group on other results of this monotropically nematogenic copper complex
   Google Scholar
• Ballauff , M. , Neubert , M. and Saupe , A. Germany, as well as from, U.S.A. A private communication (July 1989/February 1990)
   Google Scholar
• Kelker , H. , Hatz , R. and Schumann , C. 1980 . Handbook of Liquid Crystals , 59 Weinheim, Deerfield Beach Florida, Basel : Verlag Chemie .
   Google Scholar
• Slotta , K. H. and Heller , H. 1930 . Ber. Dtsch. Chem. Ges. , 63 : 3029 1a melts at 172°C
   Google Scholar
• Kohne , B. , Praefcke , K. , Shahana Omar , R. and Frolow , F. 1986 . Z. Naturforsch. , 41b : 736 In contrast to 5a and b their analogues obtained from the corresponding 4-alkoxybenzaldehydes (no alkoxy groups in the 2- and 3-position) and meso-erythritol exhibit a monotropically nematic or a smectic-A phase
   Google Scholar
• See Reference 9 and earlier papers from our group cited therein
   Google Scholar
• Praefcke , K. , Kohne , B. and Singer , D. 1990 . Angew. Chem. , 102 : 200
   Google Scholar
• 1990 . Angew. Chem. Int. Ed. Engl. , 29 : 177
   Web of Science ®Google Scholar
• The 2,3,4-trimethoxy benzaldehyde is commercially available; cf. ref. 25
   Google Scholar
• Barger , G. and Ewins , A. J. 1910 . J. Chem. Soc. , 97 : 2253
   Google Scholar