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structural formula
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  结构式
     The structural formula of the complex was confirmed as [Mn 6O 2(O 2CPh) 10 (py) 4]·MeCN by single crystal X ray analysis.
     经X射线单晶结构分析确定该配合物晶体的化学结构式为[Mn6O2(O2CPh)10(py)4]·MeCN。
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     According to TG- DTA result, production structural formula CeO_2·1/2H_2O was predication.
     通过TG-DTA结果断定所制备的产物结构式为CeO_2·1/2H2_O。
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     Analysis of Structural Formula of “Wei (为) + Noun_1/Pronoun + Noun_2”
     “为+名_1/代+名_2”结构式论析
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     The nature of the chemical bond in Ag2C2 molecule is discussed from the point of view of molecular orbital theory. In Ag2C2 molecule there are two delocali2ed π bondsπ2y4,π2z4.The structural formula is Ag-C-C-Ag,not Ag-C=C-Ag.
     本文利用分子轨道法讨论Ag_2C_2分子的成键方式,分析分子轨道能极的高低,阐明在Ag_2C_2分子中有两个多原子离域π键形成的原因,Ag_2C_2分子的结构式宜表示为: Ag—C—C—Ag π_(y4)~2,π_(z4)~2
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     By determining available oxygen in pure Mn 3O 4, its structural formula is confirmed to be 2MnO·MnO 2. The determinating methods for determinating the valance state ratio of Mn(Ⅱ) to Mn(Ⅳ) in paste Mn 3O 4 in investigated.
     通过纯Mn3O4 中有效氧的测定结果 ,进一步确认Mn3O4 为 2MnO·MnO2 型结构式。 同时研究了浆状Mn3O4 中Mn的价态比的测定方法。
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  结构公式
     This paper studies the theoretical model of physical adaptation and goes on to verify and expound the scientific soundness and rationality of the said model by means of structural-dimensional analysis and structural formula model.
     2、本文对人体适应能力的理论模型进行了研究,经结构维度分析、结构公式模型检验验证了人体适应能力理论模型的科学性和合理性。
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     Using this structural formula, some difficult problems about degree of freedom of plane mechanisms contained gear pair can be solved perfc-ctly, which can not be solved easily by the common struetral formula.
     用此新含义的结构公式可园满解决普通的结构公式难以正确解决的一些包含齿轮副机构自由度计算中的疑难问题。
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     Using this structural formula,some difficult problems about degree of freedom of planemechanisms containing gear pair, which can hardly be solvedby the common structural formula, can now be perfectlysolved.
     用此新含义的结构公式可圆满解决普通结构公式难以正确解决的一些包含齿轮副机构在自由度计算中的疑难问题。
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     A reasonable complement and explanation is given in this paper for traditional structural formula of plane mechanism with the use of intruducing necessary components or eliminating extra components.
     采用引进必要带副构件或去掉多余带副构件的方法,对传统的平面机构结构公式作了合理的补充与说明。
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     Supposing there is S≥2 , the linear indefinite equation in S variables refers to the following form: a1x1 + a2x2 +…+ ascs = n , in which ai (i = 1,2, …, s ) and n are given integral numbers, a1 a2… as ≠0. This paper provides a structural formula of integer solution for the above form by means of division algorithm of S variables a1,a2,… , as.
     设S≥2,S元一次不定方程是指a_1x_1十a_2x_2十…十a_sx_s=n其中a_i(i=1,2,…,s)与n都是给定的整数,a_1a_2…a_s≠0.本又通过S元a_1,a_2,…,a_5的辗转相除法,给出上式的整数解的结构公式.
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  “structural formula”译为未确定词的双语例句
     Thus, the calculated structural formula of such an anosovite in the slag seems to be: 0.15[(Mg_(0.27)Ti_(0.73))0.2TiO_2]·0.85[Ti_2O_3·TiO_2]
     导出了渣中黑钛石的分子式为0.15[(Mg_(0.27)Ti_(0.73))0.2TiO_2]·0.85[Ti_2O_3·TiO_2]。
短句来源
     They are expressed by the general structural formula ABX 3,where A stands for Na,Ca,Sr…,B stands for Ti,Nb,Fe 3+ ,Th…,and X stands for O,F.
     它们的一般化学式为ABX3 ,其中A代表Na ,Ca ,Sr等 ,B代表Ti,Nb ,Fe3 +,Th等 ,X代表O ,F。
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     By the application of the energy dissipation rate a structural formula for scouring depth by jet from spillway is obtained: T=kg~(-0.25) Q~(0.5) H~(0.25).
     本文应用消能率求得了挑流冲深公式的构造形式:T=kg~(-0.25)q~(0.5)H~(0.25).
短句来源
     veral amphoteric surface active agents with the structure of pyridine derivate were synthesized and their structural formula were respectively C5H5N+CH2CH2OCH2CH2SO3-,C5H5,N+(CH2)3OSO3 and C5H5N+CH2C6H4SO3-. Three steps were took and the yield was about 90%, 85% and 70% respectively.
     初步合成出2种具有C5H5N+-R-SO3-(其中R为烷氧基和芳基)结构特征的吡啶衍生物类两性表面活性剂。
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     SEM, XRD and FT-IR were employed to study the composition and the microstructure of the coating. The results obtained indicate that the main composition of coating is crystal HAP, whose structural formula is Ca 10(PO 4) 6(OH) 2. So the coating has bioactivity.
     XRD、SEM和 FT- IR实验表明本方法得到的 HAP涂层 ,其主要成分以 HAP(Ca10 (PO4 ) 6 (OH) 2 )的形式存在 ,保持了具有生物活性的结构形态 ,且结晶度良好。
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  structural formula
The type of substitution in the monomer unit of the polymer has been established by examining a number of spectral regions, and its structural formula is given.
      
1.A polyazine of the following structural formula [=CH-CH=N-N=]x has been obtained by the condensation of hydrazine with glyoxal.2.The polyazine possesses semiconducting properties.
      
X-ray determination of the structural formula of one of the isomeric tetrabromonaphthalenes
      
We also give a general structural formula for ?σ00σn0?.
      
Representation of a structural formula of a compound as a complete set of nonisomorphic k-vertex (2 ≤k≤7) connected fragments is used to evaluate the structural similarity of compounds.
      
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A new iodine heterocycle, 3,6-dinitro-dibenzopyriodonium bisulfate (Ⅲa), prisms, m.p. 217.5° (dec.), was found to be readily prepared in 86% yield by treating 4,4'-dinitrodiphenylmethane with iodosyl sulfate, which was conveniently obtained by stirring a stoichiometric mixture of iodine and sodium iodate in concentrated sulfuric acid. The iodonium compound (Ⅲa) could be converted to the chloride (Ⅲb), colorless needles, m.p. 211.5° (dec), bromide (Ⅲc), yellowish needles. m.p. 217.5° (dec.), iodide (Ⅲd), yellow...

A new iodine heterocycle, 3,6-dinitro-dibenzopyriodonium bisulfate (Ⅲa), prisms, m.p. 217.5° (dec.), was found to be readily prepared in 86% yield by treating 4,4'-dinitrodiphenylmethane with iodosyl sulfate, which was conveniently obtained by stirring a stoichiometric mixture of iodine and sodium iodate in concentrated sulfuric acid. The iodonium compound (Ⅲa) could be converted to the chloride (Ⅲb), colorless needles, m.p. 211.5° (dec), bromide (Ⅲc), yellowish needles. m.p. 217.5° (dec.), iodide (Ⅲd), yellow powder, m.p. 164° (dec.) and picrate (Ⅲe), yellow needles, m.p. 183-184° (dec.) by treating its solution in formic acid with a 50% formic acid solution of sodium chloride, sodium bromide or potassium iodide or with an alcoholic solution of picric acid respectively. The structural formula (Ⅲ) of the new iodonium compounds was derived by means of potassium permanganate oxidation of the bisulfate (Ⅲa) to 2-iodo-4-nitrobenzoic acid, and by thermal decomposition of the iodide (Ⅲd) to 2,2'-diiodo-4, 4'-dinitro-diphenyl-methane (Ⅵ) (60% yield), m.p. 158-159°, the structure of which was shown by analysis and by comparison with what is known about the behavior of other iodonium iodides, e.g., 4,4'-dicarboethoxy-diphenylene iodonium iodide (Ⅷ), which decomposes on heating yielding 2,2'-diiodo-4,4'-dicarboethoxydiphenyl (Ⅸ). Compound (Ⅵ) could be reduced with tin and hydrochloric acid to a diamino compound (Ⅶ).The iodonium salt (Ⅲa) possessed the interesting property that when it was treated with dilute sodium hydroxide solution at room temperature with the addition of ethyl acetate or pyridine, a beautiful bluish-green color gradually developed in the organic layer. When it was heated with dry pyridine, the same color developed. The colored ethyl acetate solution changed to brownish yellow on acidification with dilute sulfuric acid and regained its bluish-green color when the acidified solution was made alkaline.Under similar conditions as described above, reaction between diphenylmethane and iodosyl sulfate gave a grayish substance, m.p. 210-212°, which was insoluble in common solvents. This substance was possibly a polymeric compound of formula (Ⅺ).

1.4,4'-二硝基二苯甲烷(Ⅰ)與硫酸亚碘醯(Ⅱ)作用,生成一种新型的含碘杂環化合物(Ⅲ_a)。 2.化合物Ⅲ_a與氯化鈉、溴化鈉、碘化鉀或苦味酸作用,置换成为相應的鹵化物(Ⅲ_(b-d))或苦味酸盐(Ⅲ_e)。 3.用鹼性高錳酸鉀溶液氧化化合物Ⅲ_a得2-碘代-4-硝基苯甲酸。 4.碘化物(Ⅲ_d)在它的熔點温度进行熱解,得2,2'-二碘代-4,4'-二硝基二苯甲烷。继还原,得相應的二氨基化合物。二者均为新化合物。 5.化合物Ⅲ_a用氢氧化鈉溶液处理,得到蓝绿色物質,溶於乙酸乙酯、丙酮、吡啶中成鲜明的蓝绿色溶液。乙酸乙酯溶液酸化後变成黄棕色,再鹼化復现蓝绿色。将化合物Ⅲ_a在无水吡啶中加熱,亦呈现蓝绿色。 6.在类似的条件下,二苯甲烷與硫酸亚碘醯起作用。

In this work the oxidation reactions of quinazolone-4 with chromic acid, potassium permanganate, peracetic acid, and perbenzoic acid have been studied. When quinazolone was heated with chromic anhydride in glacial acetic acid, quinazolone chromate(I) was isolated as previously reported in literature. Oxidation of quinazolone with potassium permanganate in neutral or alkaline solutions gave quinazolone oxalate (III) and with the same reagent in acidic solutions produced benzoylene urea (2,4-dihydroxyquinazoline,...

In this work the oxidation reactions of quinazolone-4 with chromic acid, potassium permanganate, peracetic acid, and perbenzoic acid have been studied. When quinazolone was heated with chromic anhydride in glacial acetic acid, quinazolone chromate(I) was isolated as previously reported in literature. Oxidation of quinazolone with potassium permanganate in neutral or alkaline solutions gave quinazolone oxalate (III) and with the same reagent in acidic solutions produced benzoylene urea (2,4-dihydroxyquinazoline, II). Carbon dioxide and ammonia were always liberated in these experiments, but no other oxidation product was isolated.In the oxidation with hydrogen peroxide in glacial acetic acid or in acetic anhydride, the following five compounds have been isolated and identified, namely, N~1, N~3-quinazolone dioxide (IV), 2,4,6-trihydroxyquinazoline (V), N-formyl-o-nitrobenzamide (VI), o-nitrobenzamide (VII) and benzoic acid (VIII). The relative amount of these products varied with the conditions of th oxidation reaction. Thus, when the reaction was carried out in glacial acetic acid at 55—60° for 14—28 hours, quinazolone was oxidized predominantly to compound VI (48—63% ), VII (11—17%) and VIII (3—9%). But when the oxidation was carried out at lower temperature (15—25°) either in glacial acetic acid or in acetic anhydride, the principal products were IV (up to 65%), V(up to 11%) and VI (up to 22%), and no significant amount of compounds VII and VIII could be obtained. From the reaction of quinazolone with perbenzoic acid in chloroform, the only product isolated was compound IV (51%).The oxidation products benzoylene urea (II) and benzoic acid (VIII) were identified by means of the mixed melting points. Quinazolone oxalate (III) was identified through its mixed melting point and the isolation of quinazolone and oxalic aicd upon treatment with sodium bicarbonate and followed by calcium chloride. The identity of o-nitrobenzamide (VII) was established through its mixed melting point and its hydrolysis o-nitrobenzoic acid.The structure of N-formyl-o-nitrobenzamide (VI) has been elucidated from its composition, its inability to react with potassium iodide, a characteristic reaction of N-oxide, and its easy hydrolysis in boiling water, cold dilute sodium bicarbonate solution and moist pyridine to o-nitrobenzamide and formic acid. The structure of quinazolone di-N-oxide(IV) has been determined on the basis of its elementary analysis, its conversion into quinazolone by potassium iodide in acetic acid at room temperature, its rearrangement to 2, 4,6-trihydroxyquinazoline in glacial acetic acid at 120° or with phosphorus trichloride in chloroform, and its further oxidation by hydrogen peroxide in glacial acetic acid to o-nitrobenzamide.The structural formula of 2,4,6-trihydroxyquinazoline (V) has been established by the following facts: First, its composition was found to be the same as the quinazolone di-N-oxide from which it was derived, but unlike the latter, it did not react with potassium iodide. Secondly,this compound gave a deep violet color with ferric chloride solution and formed with acetic anhydride a monoacetyl derivative which gave no color reaction with ferric chloride solution but could be hydrolyzed by diluted hydrochloric acid to the original trihydroxyquinazoline. Thirdly, the trihydroxyquinazoline reacted with phosphorus pentachloride in phosphorus oxychloride to give 2,4,6-trichloroquinazoline, and the latter was converted by hydrolysis with concentrated hydrochloric acid to 2,4-dmydroxy-6-chloroquinazoline. The identities of these monochloro-and trichloro-compounds have been established by mixed melting points with synthetic samples.Based upon the facts mentioned above, the mechanism of the oxidative degradation of quinazolone-4 with hydrogen peroxide in glacial acetic acid to form compounds IV—VII has been proposed as follows:The mechanism of the formation of benzoic acid (VIII) is still obscure.

喹唑酮在冰醋酸中与三氧化铬作用,形成喹唑酮铬酸盐(I);在中性或硷性溶液中与高锰酸钾作用,形成喹唑酮草酸盐(III),但在酸性溶液中与高锰酸钾作用,则形成2,4-二羟基喹唑啉(II)。以过氧化氢在冰醋酸或醋酸酐中与喹唑酮作用,分离出N~1,N~3-二氧化喹唑酮(IV),2,4,6-三羟基喹唑啉(V),N-甲酰隣硝基苯甲酰胺(VI),隣硝基苯甲酰胺 (VII)及苯甲酸(VIII)等化合物。这些氧化产物的相对产量,随反应条件不同而有很大的差别。在较强烈的条件下,主要产物为氧化程度较高的衍化物(VI—VIII);而在较温和的条件下,则主要产物为氧化程度较浅的化合物(IV—VI)。以过氧化苯甲酸在氯仿中与喹唑酮作用,则只分离出IV。 N~1,N~3-二氧化喹唑酮在醋酸中以碘化钾脱氧得到喹唑酮;在醋酸中重排为2,4,6-三羟基喹唑啉;在冰醋酸中与过氧化氢进一步反应,则得隣硝基苯甲酰胺。2,4,6-三羟基喹唑啉与醋酸酐作用,可得2,4二羟基-6-乙酰氧基喹唑啉,后者水解又得到三羟基喹唑啉。2,4,6-三羟基喹唑啉与五氯化磷在三氯氧磷中作用,即氯化为2,4,6-三氯喹唑啉,后者水解则得到2,4-二羟基6-氯喹唑啉。 N-甲...

喹唑酮在冰醋酸中与三氧化铬作用,形成喹唑酮铬酸盐(I);在中性或硷性溶液中与高锰酸钾作用,形成喹唑酮草酸盐(III),但在酸性溶液中与高锰酸钾作用,则形成2,4-二羟基喹唑啉(II)。以过氧化氢在冰醋酸或醋酸酐中与喹唑酮作用,分离出N~1,N~3-二氧化喹唑酮(IV),2,4,6-三羟基喹唑啉(V),N-甲酰隣硝基苯甲酰胺(VI),隣硝基苯甲酰胺 (VII)及苯甲酸(VIII)等化合物。这些氧化产物的相对产量,随反应条件不同而有很大的差别。在较强烈的条件下,主要产物为氧化程度较高的衍化物(VI—VIII);而在较温和的条件下,则主要产物为氧化程度较浅的化合物(IV—VI)。以过氧化苯甲酸在氯仿中与喹唑酮作用,则只分离出IV。 N~1,N~3-二氧化喹唑酮在醋酸中以碘化钾脱氧得到喹唑酮;在醋酸中重排为2,4,6-三羟基喹唑啉;在冰醋酸中与过氧化氢进一步反应,则得隣硝基苯甲酰胺。2,4,6-三羟基喹唑啉与醋酸酐作用,可得2,4二羟基-6-乙酰氧基喹唑啉,后者水解又得到三羟基喹唑啉。2,4,6-三羟基喹唑啉与五氯化磷在三氯氧磷中作用,即氯化为2,4,6-三氯喹唑啉,后者水解则得到2,4-二羟基6-氯喹唑啉。 N-甲酰隣硝基苯甲酰胺与沸水,冷碳酸氢钠水溶液或湿吡啶作用,则水解为隣硝基苯甲酰胺及甲酸。根据我们实验的结果,这些氧化产物的生成机构如下:■

Antimonyl gallein, as it is formod in acid solution, is an 1: 1 (organic partto antimony) antimonyl compound. It has been prepared in crystalline form andanalyzed. Spectrophotometric measurements, on basis of either the method of con-tinuous variations or the molar ratio method, indicate also 1: 1 combinationof the complex in solution. The result is in agreement with the experiments ofVolmar and Goettelmann. The structural formula of the complex has beonproposed and discussed.

在酸性溶液中制得4,5-二羟基荧光黄锑纯品,经分析证明其组成中有机部分对锑之比为1:1。复经浓比递变法(连续变化法)或分子比例法均证明该化合物在溶液中亦以1:1比例存在。文中并讨论4,5-二羟基荧光黄锑的结构式。

 
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