• Journal of the Korean Chemical Society
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• v.29 no.3
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• pp.213-219
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• 1985

The relative stability as a function of geometry in rigid cyclopropylcarbinyl cations was examined by $^{19}$F-nmr spectroscopy. 8-p-Fluorophenyl-tricyclo[3.3.1.0$^{2,7}$]octane-8-yl-(I), 9-p-fluorophenyl-tricyclo[3.3.1.0$^{2,8}$]nonane-9-yl (II), and 10-p-fluorophenyl-tricyclo[4.3.1.0$^{2,9}$]decane-10-yl cation(Ⅲ) were prepared from the corresponding carbinols in FSO$_3$H-SO$_2$ClF solution at -120$^{\circ}C$. $^{19}$F-nmr data indicate that the symmetrical bisected geometry of cyclopropane ring for ${\sigma}$-conjugation is a very impotant factor in charge delocalization. However, varied orientation of the bond angle ${\theta}$ within the bisected conformation does not affect the charge delocalization into the cyclopropane ring.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2006.05a
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• pp.202-205
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• 2006

Some advanced nations have already developed and utilized high performance carbocyclic compounds as liquid fuel components. The common point of these compounds includes polycycles. We synthesized some promising compounds which include multiplex ring form. According to three kinds of cyclopropanation method, we could synthesize five target materials and measure their physical properties.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2008.11a
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• pp.463-466
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• 2008

The weapon systems with a liquid propulsion engine have been used for various purposes and demands of the liquid fuel with variety of properties for its operational purposes and environment. The cyclic hydrocarbons including norbornane or dicyclopentane structures have many applications to the guided weapon systems due to the high density and high energy characteristics, also efforts have been given in many fields. In this study, the cyclic hydrocarbons that we designed and fabricated were investigated to obtain tendency on the structures.