The aliphatic-acid-mediated dehydration of C_6–10-α,ω-alkanediols to alkadienes proceeds in a stepwise manner: C_6–10-α,ω-alkanediols react with aliphatic acids first to generate diesters; subsequent pyrolysis of the latter produces alkadienes. The highest yields of 1,5-hexadiene, 1,7-octadiene, and 1,9-decadiene were up to 70.3, 74.8, and 90.3%, respectively. It turned out that pyrolysis favors the diester with a longer carbon chain more, while acetic acid outperformed the other aliphatic acids in the pyrolysis step that a relatively lower temperature was enough for a high yield of alkadienes.

中文翻译：

---

脂肪酸催化将C _6-10 -α，ω-烷二醇有效脱水为烷二烯

脂族酸介导的C _6-10 -α，ω-链烷二醇脱水成链状二烯的过程是逐步进行的：C _6-10 -α，ω-链烷二醇先与脂肪酸反应生成二酯。随后的后者的热解产生链二烯。1,5-己二烯，1,7-辛二烯和1,9-癸二烯的最高收率分别达到70.3％，74.8％和90.3％。结果表明，热解更有利于具有更长碳链的二酯，而乙酸在热解步骤中的表现优于其他脂肪族酸，因为相对较低的温度足以获得高产率的链二烯。