Rational Design of Macromolecular Structures: Focusing on the Embryonic Stages of Polymerization |
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| Authors: | Otto Vogl Gary D Jaycox William J Simonsick Jr Koichi Hatada |
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| Institution: | 1. Polytechnic University , 333 Jay Street Brooklyn, New York, 11201;2. Department of Chemistry , Columbia University , New York, New York, 10027;3. Marshall R &4. D Laboratory E. I. du Pont de Nemours and Co Philadelphia , Pennsylvania, 19146;5. Department of Chemistry Faculty of Engineering Science , Osaka University Toyonaka , Osaka, 560, Japan |
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| Abstract: | Acetate-terminated oligomers of fluoral, chloral and bromal, prepared with the lithium alkoxides of tert-butanol and (-)-borneol, were analyzed by gas chromatography, polarimetry, NMR and mass spectroscopies, and by single crystal x-ray diffraction methods. The configurational and conformational properties of the “embryonic” adducts were found to depend strongly on the relative size of the trihalomethyl side group in these systems. The results of our efforts, summarized here, help to shed new light on the origins of helical geometry and crystalline order in polymers of the perhaloacetaldehydes. |
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