Reactions of co-ordinated ligands. Part V. The addition of tetrafluoroethylene to tricarbonyl(diene)iron, tricarbonyl(trans-cinnamaldehyde)iron, and tricarbonyl(o-styryldiphenylphosphine)iron complexes
作者:Alan Bond、Brian Lewis、Michael Green
DOI:10.1039/dt9750001109
日期:——
Tetrafluoroethylene reacts with tricarbonyl(buta-1,3-diene, trans-penta-1,3-diene, isoprene, or 2,3-dimethylbuta-1,3-diene)iron on u.v. irradiation to afford 1 : 1 adducts formulated as π-allylic iron(II) complexes, in which the C2F4 links the metal and diene, the linking reaction occurring preferentially at the least-substituted end of the diene. Similar reactions are observed with tricarbonyl(cyclohexa-1,3-diene
四氟乙烯在紫外线辐射下与三羰基(丁1,3-二烯,反-戊-1,3-二烯,异戊二烯或2,3-二甲基丁-1,3-二烯)铁反应,制得配比为1:1的加合物π-烯丙基铁(II)络合物,其中C 2 F 4连接金属和二烯,该连接反应优先发生在二烯的最低取代端。用三羰基(环己-1,3-二烯或双环[4.2.0]八-1,3-二烯)铁观察到类似的反应,得到π-烯丙基加合物。与三羰基(环辛-1,3-二烯)铁的相应反应得到两种络合物,一种π-烯丙基加合物和一种四羰基铁杂环戊烷。四羰基和三羰基(反式肉桂醛)铁与C 2反应F 4给出四羰基铁杂环戊烷,其中醛和苯基具有相对的顺式构型。三羰基(降冰片二烯)铁和三羰基(邻苯乙烯基二苯基膦)铁也与C 2 F 4形成加合物,前者生成降冰片四环烯。讨论了这些配合物的核磁共振谱和可能的形成方式。