本文利用 HRuCo_3(CO)_(12)原子簇化合物制备了 Ru-Co/SiO_2双金属催化剂,并研究了它们在 CO 加氢反应中的催化性能。结果表明,若和由[Et_4N][HRu_3(CO)_(11)]、Co_4(CO)_(12)以及 Co_4(CO)_(12)+[Et4N][HRu_3(CO0)_(11)]和 CoCl2+RuCl_...本文利用 HRuCo_3(CO)_(12)原子簇化合物制备了 Ru-Co/SiO_2双金属催化剂,并研究了它们在 CO 加氢反应中的催化性能。结果表明,若和由[Et_4N][HRu_3(CO)_(11)]、Co_4(CO)_(12)以及 Co_4(CO)_(12)+[Et4N][HRu_3(CO0)_(11)]和 CoCl2+RuCl_3制备的 Ru/SiO_2、Co/SiO_2和 Ru/SiO_2+Co/SiO_2催化剂相比,由 HRuCO_3(CO)_(12)制备的催化剂在 CO 加氢反应中显示了很高的 CO 转化率和含氧化合物的选择性。通过光电子能谱方法可认为,具有近距离的 Ru-Co^(2+)双金属原子中心是 CO 加氢反应中形成含氧化含物的活性中心。展开更多
Infrared spectra of mass-selected homoleptic dinuclear palladium carbonyl cluster cations Pd2（CO）n （n=5 8） are measured via infrared photodissociation spectroscopy in the carbonyl stretching frequency region. The ...Infrared spectra of mass-selected homoleptic dinuclear palladium carbonyl cluster cations Pd2（CO）n （n=5 8） are measured via infrared photodissociation spectroscopy in the carbonyl stretching frequency region. The structures are established by comparison of the experimental spectra with simulated spectra derived from density functional calculations. The Pd2（CO）＋ cation is characterized to have two weakly semibridging CO groups with C2 symmetry. The Pd2（CO）6＋ and Pd2（CO）7＋ cations are determined to involve one weakly semibridging CO group. The Pd2（CO）8＋ cation is a CO coordination saturated cluster, which is determined to have a D2d structure with all of the carbonyl groups terminally bonded. Bonding analysis indicates that these cluster cations each has a Pd--Pd half bond. The Pd--Pd distance increases with the number of CO ligands.展开更多
The crystal structure of the title complex (CO) 5ReSnMe 2Re(CO) 5, (C 12 H 6O 10 Re 2Sn, M r =801.27), has been determined by single crystal X ray diffraction. The crystal is monoclinic with space g...The crystal structure of the title complex (CO) 5ReSnMe 2Re(CO) 5, (C 12 H 6O 10 Re 2Sn, M r =801.27), has been determined by single crystal X ray diffraction. The crystal is monoclinic with space group P2 1/n (NO.14), a=10.587(2), b=12.392(2), c = 14.594(3) , β = 100.59(3)°, V = 1882(1) 3, D x = 2.828 g·cm -3 , F(000)=1432, μ =14.3759mm -1 , Z =4, and final R =0 0440 and R w =0 0483 for 1954 reflections ( I≥3σ(I )). In the complex the Sn atom is connected to two methyl groups and two Re atoms which are in slightly distorted tetrahedral arrangement. The Re atom is coordinated by five carbonyl ligands and one Sn atom, forming an octahedral structure.展开更多
文摘本文利用 HRuCo_3(CO)_(12)原子簇化合物制备了 Ru-Co/SiO_2双金属催化剂,并研究了它们在 CO 加氢反应中的催化性能。结果表明,若和由[Et_4N][HRu_3(CO)_(11)]、Co_4(CO)_(12)以及 Co_4(CO)_(12)+[Et4N][HRu_3(CO0)_(11)]和 CoCl2+RuCl_3制备的 Ru/SiO_2、Co/SiO_2和 Ru/SiO_2+Co/SiO_2催化剂相比,由 HRuCO_3(CO)_(12)制备的催化剂在 CO 加氢反应中显示了很高的 CO 转化率和含氧化合物的选择性。通过光电子能谱方法可认为,具有近距离的 Ru-Co^(2+)双金属原子中心是 CO 加氢反应中形成含氧化含物的活性中心。
文摘Infrared spectra of mass-selected homoleptic dinuclear palladium carbonyl cluster cations Pd2（CO）n （n=5 8） are measured via infrared photodissociation spectroscopy in the carbonyl stretching frequency region. The structures are established by comparison of the experimental spectra with simulated spectra derived from density functional calculations. The Pd2（CO）＋ cation is characterized to have two weakly semibridging CO groups with C2 symmetry. The Pd2（CO）6＋ and Pd2（CO）7＋ cations are determined to involve one weakly semibridging CO group. The Pd2（CO）8＋ cation is a CO coordination saturated cluster, which is determined to have a D2d structure with all of the carbonyl groups terminally bonded. Bonding analysis indicates that these cluster cations each has a Pd--Pd half bond. The Pd--Pd distance increases with the number of CO ligands.
文摘The crystal structure of the title complex (CO) 5ReSnMe 2Re(CO) 5, (C 12 H 6O 10 Re 2Sn, M r =801.27), has been determined by single crystal X ray diffraction. The crystal is monoclinic with space group P2 1/n (NO.14), a=10.587(2), b=12.392(2), c = 14.594(3) , β = 100.59(3)°, V = 1882(1) 3, D x = 2.828 g·cm -3 , F(000)=1432, μ =14.3759mm -1 , Z =4, and final R =0 0440 and R w =0 0483 for 1954 reflections ( I≥3σ(I )). In the complex the Sn atom is connected to two methyl groups and two Re atoms which are in slightly distorted tetrahedral arrangement. The Re atom is coordinated by five carbonyl ligands and one Sn atom, forming an octahedral structure.
