单词	diene
释义	diene /ˈdʌɪiːn / noun Chemistry An unsaturated hydrocarbon containing two double bonds between carbon atoms.They had reacted a conjugated diene with a simple alkene to generate a cycloalkane.... The formation of conjugated dienes occurs when free radicals attack the hydrogens of methylene groups separating double bonds and leading to a rearrangement of the bonds. They found that the lead catalyst was effective in reacting the well known Si-containing reagent Danishefsky's diene with various aldehydes to produce dihydropyrone hetero-cycles. Origin Early 20th century: from di-1 'two' + -ene.
随便看	September 11 Septembered Septemberer Septemberiser Septemberish Septemberizer September massacres September thorn Septembrian Septembriser Septembrish Septembrism Septembrist Septembrizer septenarius septenary septennial septennium septet septette septi- septic septicaemia septicaemic septically

英语词典包含243303条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。