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transition metallic
相关语句
  过渡金属
    The Quantum Calculation for the Structural Rule of the Transition Metallic Heteroboranes
    过渡金属杂硼烷结构规则的量子化学计算
短句来源
    Study on Complexing of Alkyl Polyamine with Transition Metallic Ion Cu(Ⅱ)
    烷基多胺与过渡金属离子Cu(Ⅱ)的络合研究
短句来源
    Calculation and Analysis of Bond Valence of Transition Metallic Halide and Car-boxylate Cluster Compounds
    过渡金属卤化物和羧酸盐簇合物的键价计算与分析
短句来源
    Calculation and Analysis of Bond Valence of Transition Metallic Carbonyl Cluster Compounds
    过渡金属羰基簇合物的键价计算和分析
短句来源
    Syntheses, Structures and Properties of Polyoxometalate-based Rare Earth and Transition Metallic Organic-inorganic Hybrid Compounds
    多金属氧酸盐稀土及过渡金属有机-无机杂化化合物的合成、结构及性能研究
短句来源
  过渡金属
    The Quantum Calculation for the Structural Rule of the Transition Metallic Heteroboranes
    过渡金属杂硼烷结构规则的量子化学计算
短句来源
    Study on Complexing of Alkyl Polyamine with Transition Metallic Ion Cu(Ⅱ)
    烷基多胺与过渡金属离子Cu(Ⅱ)的络合研究
短句来源
    Calculation and Analysis of Bond Valence of Transition Metallic Halide and Car-boxylate Cluster Compounds
    过渡金属卤化物和羧酸盐簇合物的键价计算与分析
短句来源
    Calculation and Analysis of Bond Valence of Transition Metallic Carbonyl Cluster Compounds
    过渡金属羰基簇合物的键价计算和分析
短句来源
    Syntheses, Structures and Properties of Polyoxometalate-based Rare Earth and Transition Metallic Organic-inorganic Hybrid Compounds
    多金属氧酸盐稀土及过渡金属有机-无机杂化化合物的合成、结构及性能研究
短句来源
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  transition metallic
[NH3(CH2)3NH3]2[Ni(HP2O7)2(H2O)2] ? 4H2O (NiDAP) is a new diphosphate of transition metallic and organic cations obtained from a mixture of H4P2O7, 2NiCO3? Ni(OH)2 ? 4H2O and NH2(CH2)3NH2 in a 1:1/6:1 molar ratio.
      
Hazard identification and characterisation Chemistry Zinc is an abundant group IIB post-transition metallic element.
      


In this paper we have calculated various polyhedral skeletons of the transition metallic heteroboranes,FenB6-n(n=0,1,...,6)by using the Hoffmann's program of EHMO method,verified and discussed the structural rule of the thansition metllic heteroboranes proposed by us.BMO+NBMO=4n1+9n2-Fwhere BMO+NBMO stands for the number of valence bonding and non-bonding molecular orbitals,n1 and n2 are respectively the numbers of main group and transition metal atoms in the skeleton of a heteroboranes,and F is...

In this paper we have calculated various polyhedral skeletons of the transition metallic heteroboranes,FenB6-n(n=0,1,...,6)by using the Hoffmann's program of EHMO method,verified and discussed the structural rule of the thansition metllic heteroboranes proposed by us.BMO+NBMO=4n1+9n2-Fwhere BMO+NBMO stands for the number of valence bonding and non-bonding molecular orbitals,n1 and n2 are respectively the numbers of main group and transition metal atoms in the skeleton of a heteroboranes,and F is the number only depending on the geometry of the skeleton,and discussed some properties of the skeletons.As example,we also calculated C6H5FeB9C2H11 and its skeleton by the same method to compare each other.

用EHMO量子化学计算方法,计算了过渡金属杂硼烷骨架Fe_nB_(6-n)(n=0,1,…,6),验证和讨论了过渡金属杂硼烷的价成键和价非键轨道数BMO+NBMO=4n_1+9n_2-F。其中n_1、n_2和F都只与骨架的几何性质有关。

The results of α- olefin hydroformylation catalysed by ruthenium and bimetallic catalysts supported on zeolite made by cation-exchange of Na+ in zeolite with Ru3+ in aqueous RuCl3 has been reported. The effects of solvent, zeolite support, α-olefin and another transition metallic ion on ruthenium catalyst supported on zeolite have been examined. With increasing polarity of the solvents, the activity and selectivity of Ru/NaX catalyst on hydroformylation increase. When ZSM-5 zeolite is used as support,...

The results of α- olefin hydroformylation catalysed by ruthenium and bimetallic catalysts supported on zeolite made by cation-exchange of Na+ in zeolite with Ru3+ in aqueous RuCl3 has been reported. The effects of solvent, zeolite support, α-olefin and another transition metallic ion on ruthenium catalyst supported on zeolite have been examined. With increasing polarity of the solvents, the activity and selectivity of Ru/NaX catalyst on hydroformylation increase. When ZSM-5 zeolite is used as support, electron donor DMF or pyridine as the solvent and cation- exchanging Rh3+ or Sn2+ into NaX zeolite, the ruthenium catalysts supported on zeolite have good activity and selectivity. The ratio of Ru to Co, the amount of the catalyst used and running time affect the activity and selectivity of the bimetallic Ru/Co/NaX catalyst remarkably. Under 200℃ , 6. 0 MPa(CO/H2= 1) Ru/Co/NaX(Ru/Co=4/2) catalyst precarbonylated in toluene has the best activity and selectivity. Catalysts used in various conditions were characterized by FT-IR etc. after reaction. FT-IR spectra show that each of the catalysts contains at least one absorbing peak above 2000 cm-1 and one below it , so it is suggested that Ru/S (S = zeolite support) catalyst has turned into Rux(CO)y/S in the reaction process, which contains both the terminal carbonyl and the bridging carbonyl. By analysis of the results of catalyst characterization, it is suggested that the bridging carbonyl in the Rux(CO)Y/S catalyst may be the main active centre in the hydroformylation processes.

研究了以离子交换法制备的分子筛负载钌及钌双金属催化剂催化。α-烯烃氢甲酰化反应的催化性能。考察了反应溶剂、分子筛、α-烯烃及其它金属对负载钌催化剂的催化性能影响,对Ru/Co/NaX催化剂考察了负载量、用量及反应时间的影响。使用ZSM-5分子筛载体、碱性DMF和吡啶为溶剂有利于提高催化剂的活性和选择性,含Rh和Sn的双金属催化剂活性和选择性很高,FT-IR特征吸收谱图证实,催化剂于反应条件下转变成Ru_x(CO)_Y/分子筛形式,既含有端羰基又含有桥羰基,其中桥羰基可能是氢甲酰化活性的主要部分。

In this paper, the aliphatic amines are separated with the ligand\|exchange gas chromatography,in which amorphous titanium pyrophosphate in the form of transition\|metallic ions is used as the stationary phase,nitrogen containing ammonia and water vapor as the mobile phase. The effect of ligand concentration, metallic ions, and column temperature on the retention and resolution of amines has been studied. The retention mechanism of amines is also discussed.

报道了以焦磷酸钛( Ti P P)作金属离子的载体,制成固定相,以含氨和水汽的高纯氮气为载气,用配体交换气相色谱法分离脂肪胺混合物的工作。研究了气相配体浓度、固定相的离子形式、柱温等诸因素对保留值和分离度的影响,探讨了胺的保留机理。

 
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