摘要
本文对六羰基金属化合物M(CO)_6(M=Cr、Mo、W)在Y型沸石上的热分解进行了程序升温分解质谱和原位红外光谱的研究,并初步讨论了这些六羰基金属在不同碱金属交换沸石上的不同行为,发现M(CO)_6在沸石上热分解能形成相对稳定的中间体“M(CO)_3”。六羰基化合物开始分解的温度以Mo为最低:Mo<Cr～W,但中间体三羰基化物的热稳定性却以Cr为最低:W>Mo>Cr。
In this paper, thermal decomposition of metal hexacarbonyls M(CO)6(M = Cr, Mo, W) in zeolites Y has been studied by infrared spectroscopy (IR) and temperature programmed decomposition-mass spectra (TPDE-MS), and properties of metal hexacarbonyls absorbed in zeolites MY (M = Na, K, Rb, Cs) have also been discussed. It is found that stable intermediates 'M(CO)3' are produced during thermal decomposition of M(CO)6 in zeolites. The temperature at which molybdenum hexacarbonyls begin to decompose is the lowest: Mo<Cr~ W. However, the order of thermal stability of intermediate 'M(CO)3'is that W>Mo>Cr.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
1992年第4期427-432,共6页
Chinese Journal of Inorganic Chemistry
关键词
六羰基金属
沸石
热分解
红外光谱
metal hexacarbonyl zeolite thermal decomposition infrared spectroscopy temperature programmed-mass spectra
