中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | ethyl (E)-2-(2-ethoxy-2-oxoethylidene)-1,3-diselenole-4-carboxylate | 35732-67-3 | C10H12O4Se2 | 354.123 |
Reaction of ethyl propiolate with lithium hexamethyldisilazide in tetrahydrofuran followed by the addition of elemental selenium provides ethyl 2-(2-ethoxy-2-oxoethylidene)-1,3-diselenole-4-carboxylate in 75% yield and as a mixture of geometrical isomers 2, 3. X-Ray crystallographic studies, as well as density functional calculations reveal close oxygen–selenium contacts that are the result of unconventional bonding interactions.