Preparation, X-ray Crystal Structures, and Reactivity of Alkynylcyclopropenylium Salts
作者:Robert D. Gilbertson、Timothy J. R. Weakley、Michael M. Haley
DOI:10.1021/jo9915372
日期:2000.3.1
produced only the corresponding monocations. A dication was prepared when an ethylene spacer was inserted between the acetylene groups of the butadiyne-bridged biscyclopropene. Single-crystal X-raystructures of three of the cyclopropenylium ions were obtained. pK(R+) titrations were carried out on two of the salts, which showed that acetylene substituents provide about the same degree of stability