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The shielding effect of the double bond in 2‐norbornene and α‐pinene and β‐pinene

机译：双粘土和α-pine烯和β-pine烯双键的屏蔽效果

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Abstract >Assignments of the chemical shifts of the 7‐syn and 7‐anti protons in 2‐norbornene and of the methyl groups in α‐pinene and β‐pinene have been determined by means of nuclear Overhauser effects. These results constrain competing theories of the shielding effects of double bonds. </abstract> </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> > 7-syn和7-抗质子的化学位移的分配在2-降冰片烯中并通过核传承效应确定α-PINENE和β-PINENE中的甲基。这些结果限制了双键屏蔽效应的竞争理论。</ p> </ abstract> </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8期</span><b style="margin: 0 2px;">|</b><span>共6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=Mazzola Eugene P.&option=202" target="_blank" rel="nofollow">Mazzola Eugene P.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Lambert Joseph B.&option=202" target="_blank" rel="nofollow">Lambert Joseph B.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Ridge Clark D.&option=202" target="_blank" rel="nofollow">Ridge Clark D.;</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 ChemistryUniversity of MarylandCollege Park MD USA;</p> <p>Department of ChemistryTrinity UniversitySan Antonio TX USA;</p> <p>Office of Regulatory Science Center for Food Safety and Applied NutritionU.S. Food and Drug AdministrationCollege Park MD USA;</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=chemical shielding anisotropy&option=203" rel="nofollow">chemical shielding anisotropy;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=norbornenes&option=203" rel="nofollow">norbornenes;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=nuclear O verhauser effects&option=203" rel="nofollow">nuclear O verhauser effects;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=pinanes&option=203" rel="nofollow">pinanes;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=pinenes&option=203" rel="nofollow">pinenes;</a> </p> <div class="translation"> 机译：化学屏蔽各向异性;Norbornenes;核o Verhauser效应;拼起;捏合; 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