红外光谱法观察二茂镧系氯化物与氧及水蒸气的反应

STUDIES ON THE REACTION OF LANTHANOCENE CHLORIDES WITH OXYGEN AND WATER VAPOR BY IN SITU INFRARED SPECTROSCOPY

用实时红外光谱法在特制的吸收池中分别观察了一些二茂镧系氯化物Cp_2LnCl(Cp=C_5H_5^-,Ln=Ho.Gd,Lu)和Cp′LuCl(Cp′=C_5H_4CH_2CH_2OCH_3)与干燥氧气及水蒸气的反应,结果证实这些二茂镧系配合物在室温干燥氧气氛中很稳定,但在水蒸气中很快水解.从水解反应的最初始阶段和较后期采得的红外光谱提示可能存在Cp_2LnOH和CpLn(OH)Cl中间化合物.

The reaction of some lanthanocene complexes Cp2LnCl(Cp = C5HS-, Ln= Ho, Gd, Lu) and Cp'LuCl (Cp'= C5H4CH2CH2OCH3) with dry oxygen and water vapor were observed respectively at room temperature by in-situ IR spectroscopy in a special designed cell. It evidently indicates that these lanthanoccnes are stable in dry oxygen atmosphere, but hydrolyzed in water vapor rapidly. The IR spectra collected in the very starting and later stage of the hydrolysis reaction imply that some intermediate compounds Cp2LnOH and CpLn(OH)Cl may exist.