metallation of the corresponding neutral complexes with potassium hydride. The anions are fairly stable at room temperature and have been fully characterized by 1H and 13C NMR spectroscopy. Above 50°C the Cr(CO)3 group (TCC) migrates irreversibly to the cyclopentadienyl residue. A kinetic study of this process has been carried out, and a mechanistic scheme for the haptotropic shift is proposed.
的
钾盐(η 6 -苯基-
TCC)
环戊二烯基,3-(η 6 -苯基-
TCC)
茚基,和9-(η 6 -苯基-
TCC)
芴基,已在THF溶液通过相应的
金属化制备与
氢化钾形成中性配合物。阴离子在室温下相当稳定,并已通过1 H和13 C NMR光谱进行了全面表征。高于50°C时,Cr(CO)3基团(
TCC)不可逆地迁移至
环戊二烯基残基。已经对该过程进行了动力学研究,并提出了一种触觉位移的机理方案。