查询词典 elemental analysis

These compounds are of substantial interest both inviewpoints of theory and practical applications, mainlyunder the stimulus to achieve synthetic models either foractive sites of iron-sulfur proteins or for transitionmetal catalysts. This thesis describes the synthesis, structures andconformations of 51 new iron-sulfur cluster complexes,which have been characterized by elemental analysis andstandard spectroscopic methods. In addition, single-crystalX-ray diffraction analyses were performed for 4 representa-tive new compounds. Reactivities of μ-〓 with mono- and di- Grig-nard reagents derived intermediates toward various organicelectrophilic substrates were studied, along with complexa-tion of arynyl-containing iron-sulfur clusters by 〓Thus, several bridged, non-bridged, monomeric, dimeric,homonuclear, heteronuclear iron-sullfur and iron-sulfur co-balt-carbon cluster complexes were synthesized. A novelreaction and convenient route for the synthesis in highyield of tetranuclear iron complexes 〓 containing atetracoordinated sulfur atom was discovered, whereas aplausible mechanism based on experimental results was propo-sed for the formation of the new cluster type.

鉴于有机铁硫原子簇化学在基础理论发展和应用方面的重要意义，因此我们开展了这一课题的研究，并取得以下主要成果： 1、本文共合成了51个新有机铁硫及含钴碳簇基的有机铁硫原子簇配合物，除用元素分析，NMR，IR，MS法表征其结构和构象外，还用X-光衍射技术测得四个代表性配合物的单晶结构和构象； 2、我们业已发现炔基Grignard试剂同〓可形成一种&开环&与&闭环&中间物的平衡混合物，研究该平衡混合物同各种亲电试剂的反应； 3、研究发现了一种可高产率地形成〓含〓四配位硫挛合簇的新化学反应并对此反应提出了—种有趣的反应机理； 4、首次由1，4-二溴丁烷双Grignard试剂与〓制得一种新型铁硫簇双硫阴离子活性中间体，并进而研究了它的亲核反应性能； 5、找到了通过〓的光化学反应来合成簇合物〓-〓的一条有实用价值的新路线。

There were five kinds of NpCpTiCl〓, in which Np was pyrolyl , indolyl ; 7-azoindolyl , indazolyl , and benzimidazolyl respectively. All of them were prepared by the reactions of CpTiCl〓 with the anions of the relevant ligands, and characterized by elemental analysis, IR, or NMR.

此外，半茂体系的催化活性都随铝／钛比的增加呈上升而后衰减型，当Al／Ti比为500左右时活性达到最高，这个值远低于茂金属催化剂活性达最高时的Al／Ti比，即茂金属配合物比半茂配合物需要更多的MAO来活化，并稳定形成的活性中心。

The novel title compound was synthesized with benzaldehyde, isobutyraldehyde, phosphorus trichloride as raw materials. The total yield was 40.8%. The structure was confirmed by 1H NMR, 31P NMR and elemental analysis.

摘要以苯甲醛、异丁醛、三氯化磷为原料合成了新型的1，3，2-氧磷杂环类化合物2-苯羟甲基－5，5-二甲基－4-苯基－2-氧代－1，3，2-二氧磷杂环己烷，总收率为40.8%，并对其进行了NMR研究和结构表征。

From isonicotinic acid,the compound isoniazide was prepared,then nine new compounds of isonicotinoyl hydrazones were synthesized and characterized by elemental analysis and 1HNMR .

从异烟酸出发，先合成异烟酰肼，然后与羰基化合物进行缩合反应，合成了 9个新的异烟酰腙类试剂。

An isonitrile ligand, 2 methyl cyclohexylisonitrile is synthesized and a copper salt Cu(I 4BF 4 of this ligand is also prepared. The isonitrile and its copper salt are characterized by IR and elemental analysis.

合成了一种新的异腈配体 2 甲基环己基异腈及其铜络盐，并经红外光谱和元素分析等表征予以确认。

Fourteen new pyrethroids containing isoxazole were designed and synthesized from 4-isopropyl-3-substituted phenyl-5-hydroxyl isoxazoles as major material, whose structures were also characterized by IR, 1H NMR and elemental analysis.

以4-异丙基-3-取代苯基-5-羟基异噁唑和3-苯氧基苄基溴为原料，三乙胺为缚酸剂，设计并合成了14个未见报道的4-异丙基-3-取代苯基-5-异噁唑基-(3'-苯氧基)苄基醚。通过红外光谱、核磁共振、元素分析等手段，确证了它们的化学结构。

Despite of language is not pure reason outcome, language construction regulation is not the regulation that one kind of culture defends like hair bloodstain make a law article , the upper characteristic of language structure type requires that the object carries out elemental analysis on thought but with national culture mode of thinking, Carry out logicalization , formalized formulation, systematicness that being running after shows.

尽管语言并非非纯粹理性的产物，语言结构规则并不像发血迹制定法律条文那样是一种文卫的规定，然而语言结构类型上的特点同民族文化思维方式要求对思维客体进行元素分析，进行逻辑化，形式化的表述，追求的是表现的规则性。

Schiff base derived from p-hydroxybenzaldehyde and p-aminobenzoic acid was prepared by solid-state reaction at supersonic speed airflow and low-heating. Lophophora shape Cu complexes was prepared from the Schiff base and copper acetate and through adding sodium dodecyl sulfate. The structural composition of complexes was confirmed by FTIR and elemental analysis.

利用超音速气流低热固相法合成了对羟基苯甲醛缩对氨基苯甲酸Schiff碱配体，再以该配体和乙酸铜为原料，通过添加十二烷基硫酸钠的方式制备出了晶形规整的仙人球型配合物，利用元素分析和红外等现代测试手段确定了配合物的结构组成。

The structures of the target molecula were characterized by IR, 1H NMR, 13C NMR, 2D NMR and elemental analysis.

为合成这些新化合物还合成了10个相关的中间体化合物。

The structures of the target molecula were confirmed by IR, 1H NMR, 13C NMR, 2D NOESY, MS and elemental analysis.

通过IR、1H NMR、13C NMR、2D NOESY、MS及元素分析确定了目标产物的结构。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。