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A natural bond orbital analysis of aryl‐substituted polyfluorinated carbanions: negative hyperconjugation

机译:芳基取代的多氟碳酸碳酸盐的天然键分析:阴性高速凝固

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Abstract > Aryl‐substituted polyfluorinated carbanions, ArCHR <sub>f</sub> ? where R <sub>f</sub> ?=?CF <sub>3</sub> ( 1 ), C <sub>2</sub> F <sub>5</sub> ( 2 ), i ‐C <sub>3</sub> F <sub>7</sub> ( 3 ), and t ‐C <sub>4</sub> F <sub>9</sub> ( 4 ), were analyzed by means of the natural bond orbital (NBO) theory at the B3LYP/6‐311+G(d,p) computational level. A lone pair NBO at the formal anionic center carbon (Cα) was not found in the Lewis structure. Instead, significant donor/acceptor NBO interactions between π(Cα‐C1) and σ*(Cβ‐F) or σ*(Cβ‐Cγ) were observed for 1 , 2 , 3a (strong electron‐withdrawing substituent, from p ‐CF <sub>3</sub> to p ‐NO <sub>2</sub> ), and 4 . Their second‐order donor/acceptor perturbation interaction energy, E (2), values decreased with the increase of the stability of carbanions. A larger E (2) value corresponds to longer Cβ‐F and Cβ‐Cγ bonds and a shorter Cα‐Cβ bond, indicating that the E (2) values can be associated with the negative hyperconjugation of the Cβ‐F and Cβ‐Cγ bonds. In accordance with this, the E (2) values for π(Cα‐C1)?→?σ*(Cβ‐F) were linearly correlated with the Δ G o <sub>β‐F</sub> values (an empirical measure of β‐fluorine negative </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> <div class="translation abstracttxt"> <span class="zhankaihshouqi fivelineshidden" id="abstract"> <span>机译:</span><Abstract Type =“main”XML:Lang =“en”> <标题类型=“main”>抽象</ title> >芳基取代的多氟菱形碳,Archr <sub> f </ sub> </ sup>其中r <sub> f </ sub>?=?cf <sub> 3 </ sub>( 1 </ b>),c <sub> 2 </ sub> f <sub> 5 </ sub>( 2 </ b>), i </ i> -c <sub> 3 </ sum> f <sub> 7 </ sub>( 3 </ b>)和 t </ i> -c <sub> 4 </ sub> f <sub> 9 </ sub>( 4 </ b>),通过自然分析B3LYP / 6-311 + G(D,P)计算水平的键轨道(NBO)理论。在Lewis结构中未发现正式阴离子中心碳(Cα)的孤立对NBO。相反,对于π(Cα-C1)和σα(Cβ-F)或σα(Cβ-F)或σ*(Cβ-Cγ),对于 1, 2 </ b >, 3a </ b>(强电子 - 抽出取代基,从 p </ i> -cf <sub> 3 </ sub>至 p </ i> -no <sub> 2 </ sub>),和 4 </ b>。它们的二阶供体/受体扰动相互作用能量, e </ i>(2),随着碳气稳定性的增加而降低。较大的 e </ i>(2)值对应于较长的Cβ-F和Cβ-Cγ键和较短的Cα-Cβ键,表明 e </ i>(2)值可以是与Cβ-F和Cβ-Cγ键的阴性超强稳定相关。根据此,π(Cα-C1)α→σ*(Cβ-F)与δ为<β-/ i>线性相关的 e </ i>(2)值< sup> o </ sup> <sub>β-f </ sub>值(β-氟阴性的经验尺寸 </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> </div> <div class="record"> <h2 class="all_title" id="enpatent33" >著录项</h2> <ul> <li> <span class="lefttit">来源</span> <div style="width: 86%;vertical-align: text-top;display: inline-block;"> <a href='/journal-foreign-35546/'>《Journal of Physical Organic Chemistry》</a> <b style="margin: 0 2px;">|</b><span>2018年第1期</span><b style="margin: 0 2px;">|</b><span>共9页</span> </div> </li> <li> <div class="author"> <span class="lefttit">作者</span> <p id="fAuthorthree" class="threelineshidden zhankaihshouqi"> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Suenaga Masahiko&option=202" target="_blank" rel="nofollow">Suenaga Masahiko;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Nakata Kazuhide&option=202" target="_blank" rel="nofollow">Nakata Kazuhide;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Abboud José‐Luis M.&option=202" target="_blank" rel="nofollow">Abboud José‐Luis M.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Mishima Masaaki&option=202" target="_blank" rel="nofollow">Mishima Masaaki;</a> </p> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zkzz" style="display: none;">展开▼</span> </div> </li> <li> <div style="display: flex;"> <span class="lefttit">作者单位</span> <div style="position: relative;margin-left: 3px;max-width: 639px;"> <div class="threelineshidden zhankaihshouqi" id="fOrgthree"> <p>Department of Chemistry Graduate School of ScienceKyushu UniversityFukuoka Japan;</p> <p>Science Research CenterHosei UniversityTokyo Japan;</p> <p>Institute for Materials Chemistry and EngineeringKyushu UniversityFukuoka Japan;</p> <p>Institute for Materials Chemistry and EngineeringKyushu UniversityFukuoka Japan;</p> </div> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zhdw" style="display: none;">展开▼</span> </div> </div> </li> <li > <span class="lefttit">收录信息</span> <span style="width: 86%;vertical-align: text-top;display: inline-block;"></span> </li> <li> <span class="lefttit">原文格式</span> <span>PDF</span> </li> <li> <span class="lefttit">正文语种</span> <span>eng</span> </li> <li> <span class="lefttit">中图分类</span> <span><a href="https://www.zhangqiaokeyan.com/clc/4796.html" title="有机化学一般性问题">有机化学一般性问题;</a></span> </li> <li class="antistop"> <span class="lefttit">关键词</span> <p style="width: 86%;vertical-align: text-top;"> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=donor/acceptor NBO interaction energy&option=203" rel="nofollow">donor/acceptor NBO interaction energy;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=natural bond orbital analysis&option=203" rel="nofollow">natural bond orbital analysis;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=negative hyperconjugation&option=203" rel="nofollow">negative hyperconjugation;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=polyflourinated carbanions&option=203" rel="nofollow">polyflourinated carbanions;</a> </p> <div class="translation"> 机译:供体/受体NBO相互作用能量;天然键轨道分析;阴性超强凝固;多氟土; 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target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">,王宝雷</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=毛明珍&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">,毛明珍</a> <span> <a href="/journal-cn-10958/" target="_blank" rel="nofollow" class="tuijian_authcolor"> . 高等学校化学学报 </a> </span> <span> . 2013</span><span>,第001期</span> </span> </div> </li> <li> <div> <b>6. </b><a class="enjiyixqcontent" href="/academic-conference-cn_meeting-22733_thesis/02022695827.html">三种1,2-二-β-(α-甲基-α'苯基)噻吩六氟环戊烯的苯基对位取代物红外光谱、核磁共振氢谱测定及碳氟键伸缩振动变化的研究</a> <b>[C]</b> <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=蒋凤池&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor"> . 蒋凤池</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=刘华卿&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">,刘华卿</a> <span> <a href="/conference-cn-22733/" target="_blank" rel="nofollow" class="tuijian_authcolor"> . 第十四届全国分子光谱学学术会议 </a> <span> <span> . 2006</span> </span> </div> </li> <li> <div> <b>7. </b><a class="enjiyixqcontent" href="/academic-degree-domestic_mphd_thesis/02031584889.html">碳酸银和二芳基碘盐促进的2,4-二取代-(4H)-5-噁唑酮芳基化反应的研究</a> <b>[A] </b> <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=王彪&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor"> . 王彪</a> <span> . 2014</span> </span> </div> </li> </ul> <ul style="display: none;"> <li> <div> <b>1. </b><a class="enjiyixqcontent" href="/patent-detail/06120105123051.html">作为抗糖尿病药的α-(三氟甲基-取代的芳氧基、芳基氨基、芳硫基或芳基甲基)-三氟甲基-取代的苯乙酸和衍生物</a> <b>[P]</b> . <span> 中国专利: CN1922143A </span> <span> . 2007-02-28</span> </div> </li> <li> <div> <b>2. </b><a class="enjiyixqcontent" href="/patent-detail/06120104366034.html">氟取代的环状碳酸酯以及含有该氟取代环状碳酸酯的电解液和电池</a> <b>[P]</b> . <span> 中国专利: CN1161036A </span> <span> . 1997-10-01</span> </div> </li> <li> <div> <b>3. </b><a class="enjiyixqcontent" href="/patent-detail/06130409623401.html">Substituted 6-aryl-imidazopyridine and 6-aryl-triazolopyridine carboxamide analogs as negative allosteric modulators of mGluR5</a> <b>[P]</b> . <span> 外国专利: <!-- 美国专利: --> US9550778B2 </span> <span> . 2017-01-24</span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译:取代6-芳基-咪唑并吡啶和6-芳基-三唑并吡啶甲酰胺类似物作为mGluR5的负变构调节剂 </span> </p> </li> <li> <div> <b>4. </b><a class="enjiyixqcontent" href="/patent-detail/06130412594595.html">SUBSTITUTED 6-ARYL-IMIDAZOPYRIDINE AND 6-ARYL-TRIAZOLOPYRIDINE CARBOXAMIDE ANALOGS AS NEGATIVE ALLOSTERIC MODULATORS OF MGLUR5</a> <b>[P]</b> . <span> 外国专利: <!-- 美国专利: --> US2016096833A1 </span> <span> . 2016-04-07</span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译:取代的6-芳基-咪唑基吡啶和6-芳基-三唑基吡啶酰胺模拟物作为MGLUR5的负变位调节剂 </span> </p> </li> <li> <div> <b>5. </b><a class="enjiyixqcontent" href="/patent-detail/06130473820550.html">Condensation products of a-aminoisopropyl phenyl ketone, via the C=O carbonyl bond, with substituted amines, functionally substituted hydrazines or derivatives of natural amino acids, having an anticancer activity</a> <b>[P]</b> . <span> 外国专利: <!-- 法国专利: --> FR2540868A1 </span> <span> . 1984-08-17</span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译:α-氨基异丙基苯基酮通过C = O羰基键与具有抗癌活性的取代胺,官能取代的肼或天然氨基酸衍生物的缩合产物 </span> </p> </li> </ul> </div> </div> </div> <div class="theme cardcommon" style="overflow: auto;display:none"> <h3 class="all_title" id="enpatent55">相关主题</h3> <ul id="subject"> </ul> </div> </div> </div> </div> <div class="right rightcon"> <div class="details_img cardcommon clearfix" 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