Abstract: Mass Spectra of Noncyclic Crown Ethers with Heterocyclic Methimazole as Terminal GroupsLiu Qingjian;Qu Rongjun;Zou Zhichen;Shi Mingli(Institute of Organic Synthetize,Department of Chemistry,Shandong Normal University,Jinan 250014,China)(Yantai Normal College,Shandong,Yantai 264025,China)Abstract:The electron impact mass spectra of noncyclic crown ethers with heterocyclic methmazole as terminal groups 1a~4a and fo were given and discussed in the present article.Keywords:noncyclic crown ether,methimazole,mass spectra