Reaction of (NH4)2WOS3 with CuI and 4-tert-butylpyridine (4-bpy) in EtOH afforded a tetranuclear neutral cluster WOS3Cu3I(4-bpy)3·0.25EtOH. This compound was characterized by elementary analysis, IR, 1H NMR, TGA,...Reaction of (NH4)2WOS3 with CuI and 4-tert-butylpyridine (4-bpy) in EtOH afforded a tetranuclear neutral cluster WOS3Cu3I(4-bpy)3·0.25EtOH. This compound was characterized by elementary analysis, IR, 1H NMR, TGA, and its crystal structure was determined by X-ray single crystal diffraction. It belongs to monoclinic, space group P2/c with a=2.220 9(2) nm, b=1.364 66(11) nm, c=2.490 6(2) nm, β=104.953(2)°, V=7.292 9(12) nm3, Z=4. The title compound may be viewed as having a half-open cubane-like structure in which three Cu(4-bpy)+ units are linked by a triply-bridging WOS32- unit and a doubly-bridging iodine atom. CCDC: 266412.展开更多
Mesoporous molecular sieves Al-MCM-41 with n（SiO2）/n（Al2O3） ratio being 20,50 and 100 were prepared.As proved by X-ray diffraction（XRD） patterns and the N2 physical sorption,the as-synthesized Al-MCM-41 exhibite...Mesoporous molecular sieves Al-MCM-41 with n（SiO2）/n（Al2O3） ratio being 20,50 and 100 were prepared.As proved by X-ray diffraction（XRD） patterns and the N2 physical sorption,the as-synthesized Al-MCM-41 exhibited typical hexagonal structure,large surface areas and narrow pore distribution.The performance of HAl-MCM-41 as catalyst for tert-butylation of p-cresol with methyl tert-butyl-ether（MTBE） was then investigated.The effects of temperature,weight hourly space velocity（WHSV） and the feed ratio n（MTBE）/n（p-cresol） on p-cresol conversion and product selectivity were examined.The results showed that mesoporous HAl-MCM-41 molecular sieves（n（SiO2）/n（Al2O3） = 20） is an efficient catalyst with high activity,selectivity and stability for the synthesis of 2-tert-butyl-p-cresol from p-cresol and MTBE by tert-butylation.展开更多
文摘Reaction of (NH4)2WOS3 with CuI and 4-tert-butylpyridine (4-bpy) in EtOH afforded a tetranuclear neutral cluster WOS3Cu3I(4-bpy)3·0.25EtOH. This compound was characterized by elementary analysis, IR, 1H NMR, TGA, and its crystal structure was determined by X-ray single crystal diffraction. It belongs to monoclinic, space group P2/c with a=2.220 9(2) nm, b=1.364 66(11) nm, c=2.490 6(2) nm, β=104.953(2)°, V=7.292 9(12) nm3, Z=4. The title compound may be viewed as having a half-open cubane-like structure in which three Cu(4-bpy)+ units are linked by a triply-bridging WOS32- unit and a doubly-bridging iodine atom. CCDC: 266412.
文摘Mesoporous molecular sieves Al-MCM-41 with n（SiO2）/n（Al2O3） ratio being 20,50 and 100 were prepared.As proved by X-ray diffraction（XRD） patterns and the N2 physical sorption,the as-synthesized Al-MCM-41 exhibited typical hexagonal structure,large surface areas and narrow pore distribution.The performance of HAl-MCM-41 as catalyst for tert-butylation of p-cresol with methyl tert-butyl-ether（MTBE） was then investigated.The effects of temperature,weight hourly space velocity（WHSV） and the feed ratio n（MTBE）/n（p-cresol） on p-cresol conversion and product selectivity were examined.The results showed that mesoporous HAl-MCM-41 molecular sieves（n（SiO2）/n（Al2O3） = 20） is an efficient catalyst with high activity,selectivity and stability for the synthesis of 2-tert-butyl-p-cresol from p-cresol and MTBE by tert-butylation.
