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Dissertations / Theses on the topic 'Solvolytic Studies'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Conner, John K. "Kinetic and product analytical studies of the solvolysis of 2-adamantyl azoxytosylate and related compounds in a range of solvents." Thesis, University of Stirling, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.257438.

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2

GUO, MAN-YAN, and 郭曼娗. "Studies on solvolytic reactivities of highly hindered tertiary benzylic substrates." Thesis, 1987. http://ndltd.ncl.edu.tw/handle/92743694269985880620.

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3

Jye-Shiow-Chuang and 莊志秀. "Studies on the Solvolytic Reactivity and the Kinetic Isotope Effect in the Solvolysis of 4-Nitro-4''-Substituted Benzhydryl Substrates." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/77866664552131979412.

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碩士<br>國立臺灣大學<br>化學研究所<br>88<br>ABSTRACT The solvolytic mechanism of diarymethyl bromides(I-B) and chlorides (I-C) were examined in this work. Twenty-two substrates were solvolyzed in 12 to 22 different solvents, respectively, and the rate constants were monitored. Correlation analyses using the single-parameter Grunwald-Winstein equation, log k = mYBnX (and YxBnX), and the dual-parameter equation, log k = mYBnX (and YxBnX) + lNOTS, were performed. The results suggested that the substrates I-B-1 and I-C-1 solvolyzed with limiting SN1 mechanism, whereas nucleophilic solvent part

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4

Lin, Yen-Shyi, and 林岩錫. "Studies on the Solvolytic Reactions of 9-fluorenyl Derivatives and Related Substrates." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/43650832084025097631.

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5

秦建譜. "Studies on Solvolytic Reactions of Secondary Benzylic、Benzhydryl and Highly Hindered Tertiary Benzylic Substrates." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/41899122152091917139.

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6

Hou, Iuan-Jan, and 侯淵傑. "Studies on the Solvolyses:Theoretical Calculation of Solvation Processes and Solvolytic Reactivity of Aromatic Acyl Bromides." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/27832889722500269539.

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碩士<br>國立臺灣大學<br>化學研究所<br>88<br>The first section of this work is the solvolysis of aroyl bromides. The reaction mechanism was investigated based on the parameter of solvent ionizing power (YBnBr). Results suggest that the mechanism is dependent on both the substituent and solvent. We conclude that compund I-B-4 exhibits a limiting SN1 mechanism and the solvolysis of compound I-B-5 involves a nuclephilic solvent participation. The extent of solvent participation increases as the electron-donating ability of the substituent decreases. In the second part of this work, we performed both

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7

Xu, Hong-Zhang, and 許宏彰. "Studies on solvolytic reactivities and K.I.E. of benzylic substrates and on the techniques of rate measurements." Thesis, 1991. http://ndltd.ncl.edu.tw/handle/02626954891203981594.

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8

陳邦紹. "Studies on steric effects in the solvolysis of benzylic substrates." Thesis, 1992. http://ndltd.ncl.edu.tw/handle/03325270755837521187.

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9

Tang, Chung-Shin, and 唐崇鑫. "Studies on Steric Effect in the Solvolysis of Benzylic Substrates." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/20087141053223153197.

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10

WU, ZENG-RONG, and 吳增榮. "Studies on solvent effect on mechanism in solvolysis of benzylic substrates." Thesis, 1989. http://ndltd.ncl.edu.tw/handle/78157898312152692683.

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11

XIAO, SHUI-SHENG, and 蕭水生. "Neighbouring group participation-studies on the retention of configuration in solvolysis." Thesis, 1990. http://ndltd.ncl.edu.tw/handle/92503789896847156233.

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碩士<br>國立交通大學<br>應用化學研究所<br>78<br>L-苯丙胺酸 (L-phenylalanine)及其胺基被鄰位- 硝基苯磺醯氧基取代的衍生物, 在溶媒三氟醋酸中, 分別行脫氨基反應及加溶媒置換反應, 皆經由苯陽離子 (phenoni- umion), 而後轉位, 分別生成立體組態相反的S-及R-託品酸 (tropic acid). 以L-白胺酸 (L-leucine)經脫氨基後所得二級醇類, 再磺化得到之磺醯氧基酸或磺醯氧基脂當起始物. 探討α位是羧酸或羧酸脂時, 以及β位持有苯環或未持有苯環時, 加溶媒置換反應之立體化學, 鄰接基參與及溶媒效應. 特別是所使用溶媒 (醋酸及三氟醋酸 ) 親核性的差祑對鄰接基參與效應的影響. S-4-甲基-2- 鄰位- 硝基苯磺醯氧基戊酸[S-4-methyl-a-(0-nitrobenzenesulfonyl- oxy)pentanlic acid] 在醋酸及三氟醋酸中行加溶媒置換反應, 羧基形成α- 內脂環 (α-lactone ring) , 造成一次

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12

Yu, De Gan, and 俞德淦. "Studies on electronic effect in the solvolysis of ��-alkyl secondary benzylic substrates." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/17271288910092355981.

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13

I, Chen Hung, and 陳宏亦. "Studies on the Solvolysis of Hindered Benzylic Substrates and Substituted Acyl Chlorides." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/74439635431443202438.

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博士<br>國立臺灣大學<br>化學研究所<br>87<br>In the solvolysis of the 1-aryl-2,2-dimethylpropyl substrates (I-T-X，I-B-X，I-C-X), the effect of ortho-methyl group on the reaction center could be reflected in two aspects. One was electron-donating effect and the other was steric hindrance. Introduction of two ortho-methyl groups in the phenyl ring, the steric hindrance will cause the deviation from the coplanarity of the aryl ring and the reaction center, and will change the extent of solvation between solvents and leaving groups (electrophilic pull). From the rate data, the deviation from the coplanarity w

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14

張立威. "Studies on electronic effect in the solvolysis of ��-cyclopropyl and benzylic substrates." Thesis, 1992. http://ndltd.ncl.edu.tw/handle/15130039712879645196.

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15

Chang, Chih-Wei, and 張志偉. "Studies on the Solvolysis Reactions of Highly Hindered Benzhydryl and 9-Fluorenyl Substrates." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/12571597271252574433.

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碩士<br>國立臺灣大學<br>化學系<br>86<br>In chapter 1, we use 2-naphthyl-2-adamantyl p-nitrobenzoate to measure the solvolysis rate constant and to show the necessary that develop the YxBnX scales. In chapter 2 and chapter 3，we use Grundwald-Winstein equation correlation analysis ortho-methyl substituted of benzhydryl and 9-aryl-9-fluorenyl substrates. For benzhydryl substrates，we can know the different effect by means of solvolysis when the increase of ortho-methyl group. The log k value of 9-

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16

Yu, Der-Gann, та 俞德淦. "Studies on Electronic Effect in the Solvolysis of α-Alkyl Secondary Benzylic Substrates". Thesis, 1994. http://ndltd.ncl.edu.tw/handle/56095692073409656238.

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碩士<br>國立臺灣大學<br>化學學系<br>82<br>1-第三丁基-1-芳基甲基反應物之溶離反應,當環上存在推電子取代基時, 其溴化物與氯化物的溶離速率,以Grunwald-Winstein關係式做迴歸分析, 可得極佳的相關係數R值,且不同離去基的溶離活性比與α-氘二級動力同位素效應, 皆顯示其為 kc 的反應機理,把不同的取代基常數值代入 Hammett-Brown 關係式,得到不同溶劑的反應常數. 此值會隨著環上電效應的降低而有變小的趨勢,顯示若苯環上推電子能力消失或有拉電子取代基時, 反應機理會有所改變.α-烷基二級苯甲反應物之溶離反應,當α-烷基從第三丁基,異丙基,乙基到甲基時,立體障礙依序遞減,線性自由能關係越來越差;當苯環上對位取代基從氫,甲基,甲硫基,到甲氧基時,推電子能力依序遞增,線性自由能關係則越來越好,相似結構的溴化物,線性自由能關係亦比氯化物佳.因此,α-烷基的立體障礙越小,則需苯環較強的共振效應,反應機構

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17

LIN, YI-CHANG, and 林義昌. "L-cyclohexylalanine and its derivatives neighbouring group participation-studies on the configuration in solvolysis." Thesis, 1992. http://ndltd.ncl.edu.tw/handle/31914216107943325527.

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碩士<br>國立交通大學<br>應用化學研究所<br>80<br>L-苯丙胺酸5 與其鄰 -硝基苯磺醯衍生物13分別進行脫氨反應及溶劑取代分解反應，在三氟醋酸中得到S 型和R 型組態生成物。為消除苯基鄰接基效應，將5 經由氫化反應合成L-環己基丙胺酸27及甲苯磺醯衍生物34。L-白胺酸的鄰 -硝基苯磺醯衍生物21 在三氟醋酸及醋酸中，進行溶劑取代分解分應，所得結果與34進行反應相同，同樣是羧基鄰接基效應形成α內酯環，然後溶劑親核基攻擊得到S 型的立體保持置換體，由此顯示在溶劑取代分解反應中L-白胺酸可做為消除苯基鄰接基效應研究之起始物。然而13在三氟醋酸中進行溶劑取代分解反應，羧基鄰接基效應並不發生，因此溶劑的親核力大小，酸性強弱與α內酯環形成的關係，有待進一步研究。

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18

He, Yan-Xuan, and 何儼軒. "L-phenylalanine and L-leucine neighbouring carboxyl group participation-studies on the configuration in solvolysis." Thesis, 1992. http://ndltd.ncl.edu.tw/handle/31970166060538855577.

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