Transactions of The Faraday Society最新文献_第8页

Phase-shift studies of Hg(3 P 0) reactions. Part 3.?Complexes of Hg(3 P 0) with some primary amines 汞(3p0)反应的相移研究。第3部分。Hg(3p0)与某些伯胺的配合物

Transactions of The Faraday Society Pub Date : 1971-01-01 DOI: 10.1039/tf9716703247

C. G. Freeman, M. McEwan, R. Claridge, L. F. Phillips

引用次数: 6

Kinetics of oxidation of α-hydroxyisobutyric acid by aquomanganese (III) ions in aqueous perchlorate media 高氯酸水溶液中水锰离子氧化α-羟基异丁酸的动力学研究

Transactions of The Faraday Society Pub Date : 1971-01-01 DOI: 10.1039/TF9716703297

C. F. Wells, C. Barnes

引用次数: 2

Specular reflectance and ellipsometric spectroscopy of oriented molecular layers 定向分子层的镜面反射率和椭偏光谱

Transactions of The Faraday Society Pub Date : 1971-01-01 DOI: 10.1039/TF9716703306

M. Dignam, M. Moskovits, R. W. Stobie

引用次数: 99

Gas-phase pyrolysis of 1,2-dichloropropane 1,2-二氯丙烷的气相热解

Transactions of The Faraday Society Pub Date : 1971-01-01 DOI: 10.1039/TF9716700080

K. A. Holbrook, J. S. Palmer

{"title":"Gas-phase pyrolysis of 1,2-dichloropropane","authors":"K. A. Holbrook, J. S. Palmer","doi":"10.1039/TF9716700080","DOIUrl":"https://doi.org/10.1039/TF9716700080","url":null,"abstract":"The gas-phase pyrolysis of 1,2-dichloropropane has been studied at temperatures from 393 to 470°C and initial pressures from 0.2 to 26.0 Torr. In a 1-1. silica reaction vessel of low surface/volume ratio, the products are the four monochloropropenes and hydrogen chloride. Above 440°C the product ratios show only a small dependence on temperature and the relative amounts of the various isomers at 457°C are (expressed as percentage of the total chloropropenes), 3-chloropropene 63.6%, cis-1-chloropropene 22.9 %, trans-1-chloropropene 12.7 %, 2-chloropropene 0.8 %. The overall reaction is closely represented by the pressure change which leads to the overall rate-constant log10k(s–1)=(13.78 ±0.21)–(54 760 ±440)/4.576 T. Arrhenius parameters have been derived for each of the chloropropene products from the above expression and the product ratios at various temperatures (extrapolated to zero time). Additions of small amounts of nitric oxide and propene had virtually no effect upon the overall rate. The reaction has also been studied at low temperatures (300–380°C) and in various packed reaction vessels. The product ratios (extrapolated to zero time and corrected for the concurrent homogeneous reaction at the higher temperatures) show increased proportions of 2-chloropropene and cis-1-chloropropene and also formation of propene which can constitute up to 15 mol % of the total organic products. The results are consistent with four parallel unimolecular reactions occurring homogeneously at high temperatures. The heterogeneous reactions are more complicated although similarities are noted with the elimination reactions of other alkyl halides at glass surfaces.","PeriodicalId":23290,"journal":{"name":"Transactions of The Faraday Society","volume":"67 1","pages":"80-87"},"PeriodicalIF":0.0,"publicationDate":"1971-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1039/TF9716700080","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"57612884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Partial molal enthalpies, excess partial molal heat capacities and structural effects of Bu4NBr and NaBPh4 in aqueous binary solvent mixtures 双溶剂水溶液中丁腈丁烷和NaBPh4的偏摩尔焓、偏摩尔热容及结构效应

Transactions of The Faraday Society Pub Date : 1971-01-01 DOI: 10.1039/TF9716700305

R. K. Mohanty, T. S. Sarma, S. Subramanian, J. C. Ahluwalia

{"title":"Partial molal enthalpies, excess partial molal heat capacities and structural effects of Bu4NBr and NaBPh4 in aqueous binary solvent mixtures","authors":"R. K. Mohanty, T. S. Sarma, S. Subramanian, J. C. Ahluwalia","doi":"10.1039/TF9716700305","DOIUrl":"https://doi.org/10.1039/TF9716700305","url":null,"abstract":"Integral heats of solution of Bu4NBr in aqueous binary solvent mixtures (containing 0.0 to 0.30 mol fraction of consolvent) of t-butanol, acetone, dioxan and ethylene glycol were determined at 15, 25, and 35°C. Integral heats of solution of NaBPh4 in the same aqueous binary solvents containing 20 % by volume (about 0.05 mol fraction) of cosolvent were also determined at 15, 25 and 35°C. Corresponding excess partial molal heat capacities Δtext-decoration:overlineC°p were derived at 20 and 30°C. The partial molal enthalpies Δtext-decoration:overlineH°s of Bu4 NBr increased (sharply in aqueous t-butanol up to 0.06 mol fraction) with the addition of increasing amount of cosolvent to water till the maximum value was attained at 0.1–0.3 mol fraction of cosolvent. The endothermicity maxima Δtext-decoration:overlineH°smax were in the decreasing order of t-butanol > acetone > ethylene glycol > dioxan. text-decoration:overlineH°smax decreased with increasing temperatures in all aqueous binary solvents. text-decoration:overlineC°p results indicate that addition of small amounts of t-butanol and acetone stabilize the water structure, the maximum stabilization occurring around 0.04 mol fraction of acetone and t-butanol. Further addition of t-butanol to 0.06 mol fraction results in complete collapse of the water structure, whereas further addition of acetone results in gradual breakdown of the water structure which continues up to 0.3 mol fraction of acetone. Dioxan and ethylene glycol seem to have net structure breaking influence on the water structure.","PeriodicalId":23290,"journal":{"name":"Transactions of The Faraday Society","volume":"67 1","pages":"305-315"},"PeriodicalIF":0.0,"publicationDate":"1971-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1039/TF9716700305","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"57613871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 24

Diffusion and association of water in some polyalkylmethacrylates. Part 1.—Equilibrium sorption and steady state permeation 水在一些聚甲基丙烯酸烷基酯中的扩散和缔合。第1部分。-平衡吸附和稳态渗透

Transactions of The Faraday Society Pub Date : 1971-01-01 DOI: 10.1039/TF9716700244

J. A. Barrie, D. Machin

引用次数: 45

Degrees of association of n-pentyl lithium and n-octyl lithium in benzene 苯中正戊基锂和正辛基锂的缔合度

Transactions of The Faraday Society Pub Date : 1971-01-01 DOI: 10.1039/TF9716700353

D. Margerison, J. D. Pont

引用次数: 13

Identification of oxygen species adsorbed on reduced titanium dioxide 还原二氧化钛吸附氧的种类鉴定

Transactions of The Faraday Society Pub Date : 1971-01-01 DOI: 10.1039/TF9716700506

C. Naccache, P. Mériaudeau, M. Che, A. J. Tench

引用次数: 139

Thermal decomposition and phase transitions in solid nitramines 固体硝胺的热分解和相变

Transactions of The Faraday Society Pub Date : 1971-01-01 DOI: 10.1039/TF9716700556

P. G. Hall

{"title":"Thermal decomposition and phase transitions in solid nitramines","authors":"P. G. Hall","doi":"10.1039/TF9716700556","DOIUrl":"https://doi.org/10.1039/TF9716700556","url":null,"abstract":"Processes of solid phase transition, fusion and decomposition in several nitramines (and a nitrosamine) have been investigated using differential scanning calorimetry. The following values (kcal mol–1) for the enthalpy changes, ΔH(TK) are reported: N-picryl-N-methylnitramine (tetryl), ΔHf(400.5)= 6.18±0.07, –ΔHd(445)= 94±2; 1,3,5-trinitro-1,3,5-triazacyclohexane (RDX)ΔHf(478.5)= 8.52 ± 0.07, –ΔHd(483)= 136 ± 2; 1,3,5,7-tetranitro-1,3,5,7-tetra-azacyclooctane, (HMX), ΔHt,β→δ(ca. 460)= 2.35±0.20, –ΔHd(ca. 540)= 166±9; 1,7-diacetoxy-2,4,6-trinitro-2,4,6-triazaheptane (BSX), ΔHf(422.5)= 9.2 ±0.4, –ΔHd(ca. 500)= 124± 12; 1,5-endomethylene-3,7-dinitro-1,3,5,7-tetra-azacyclooctane (DPT), –ΔHd(ca. 471)= 35 ± 6; 1,3-dinitro-1,3-diazacyclopentane (DDCP), ΔHf(403)≃ 6.0; 1,3-dinitro-1,3-diazacyclohexane(DDCHX), ΔHt(343)= 3.7 ± 0.3, ΔHf(353)= 0.70 ±0.02; 1,3-dinitro-1,3-diazacycloheptane (DDCHP), ΔHt(370)≃ 5.6, ΔHf(376)≃ 0.95; 1,3,5-trinitroso-1,3,5-triazacyclohexane (TNOHX), ΔHt(365)= 4.25±0.15, ΔHf(376)= 0.90±0.03. The depression of the melting point of tetryl caused by pre-heating the solids is used together with literature data ((i) relating the melting point depression with the amount of gas produced during decomposition, and (ii) for the amount of gas produced on complete decomposition) to calculate first-order rate constants for decomposition in the region of the solid→liquid transition. The results indicate a “premonitory” effect at temperatures below the melting point. With the exception of RDX (apparent Ea= 45.2±0.4 kcal mol–1) the apparent activation energies for de-composition of the nitramines tend to be unrealistically high. DDCHX, DDCHP and TNOHX show plastic crystal behaviour and may be classified as “globular” molecules; the absence of this type of behaviour with DDCP and RDX is discussed in terms of factors affecting molecular rotation in the solid state.","PeriodicalId":23290,"journal":{"name":"Transactions of The Faraday Society","volume":"67 1","pages":"556-562"},"PeriodicalIF":0.0,"publicationDate":"1971-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1039/TF9716700556","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"57614881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 94

Catalysis of radical-recombination reactions in flames by alkaline earth metals 碱土金属对火焰中自由基-复合反应的催化作用

Transactions of The Faraday Society Pub Date : 1971-01-01 DOI: 10.1039/TF9716700730

D. Cotton, D. R. Jenkins

引用次数: 40