<p><b>5-癸炔</b>（英語：<span lang="en">5-Decyne</span>，也稱為<b>二正丁基乙炔</b>，<span lang="en">dibutylethyne</span>）是癸炔的一種同分異構體，分子式C<sub>10</sub>H<sub>18</sub>，5號與6號碳原子之間為碳碳三鍵。在常溫常壓下，5-癸炔密度為0.766 g/mL，沸點為177攝氏度，摩爾質量為138.25 g/mol。5-癸炔與4-辛炔、3-己炔和2-丁炔都為對稱炔烴。
</p>
<h2><span id=".E5.8F.83.E8.80.83.E8.B3.87.E6.96.99"></span><span id="參考資料">參考資料</span></h2>

<!-- 
NewPP limit report
Parsed by mw1450
Cached time: 20230505230744
Cache expiry: 1814400
Reduced expiry: false
Complications: []
CPU time usage: 0.305 seconds
Real time usage: 0.394 seconds
Preprocessor visited node count: 3941/1000000
Post‐expand include size: 31670/2097152 bytes
Template argument size: 3331/2097152 bytes
Highest expansion depth: 25/100
Expensive parser function count: 8/500
Unstrip recursion depth: 0/20
Unstrip post‐expand size: 850/5000000 bytes
Lua time usage: 0.148/10.000 seconds
Lua memory usage: 19699448/52428800 bytes
Number of Wikibase entities loaded: 0/400
--><!--
Transclusion expansion time report (%,ms,calls,template)
100.00%  343.549      1 -total
 33.09%  113.678      1 Template:Chembox
 30.77%  105.709      1 Template:Lang-en
 18.17%   62.410      1 Template:Chembox_Identifiers
 11.44%   39.309      1 Template:Expand_German
 11.01%   37.834      1 Template:炔烴
 10.44%   35.855      1 Template:Navbox
 10.37%   35.617      1 Template:Expand_language
  8.89%   30.544      1 Template:Ambox
  7.94%   27.274     11 Template:化學式
-->
**5 - 癸炔**（英語：5-Decyne，也稱為**二正丁基乙炔**，dibutylethyne）是癸炔的一種同分異構體，分子式 C10H18，5 號與 6 號碳原子之間為碳碳三鍵。在常溫常壓下，5 - 癸炔密度為 0.766 g/mL，沸點為 177 攝氏度，摩爾質量為 138.25 g/mol。5 - 癸炔與 4 - 辛炔、3 - 己炔和 2 - 丁炔都為對稱炔烴。

## 參考資料
1942-46-7