Journal of The Chemical Society A: Inorganic, Physical, Theoretical最新文献_第9页

Kinetics of solvent exchange and ligand substitution reactions of metal ions in relation to structural properties of the solvent 溶剂交换和金属离子配体取代反应动力学与溶剂结构性质的关系

Journal of The Chemical Society A: Inorganic, Physical, Theoretical Pub Date : 1971-01-01 DOI: 10.1039/J19710002198

H. P. Bennetto, E. Caldin

引用次数: 41

The reactions of acetylene and propyne at the surface of liquid sodium 乙炔和丙炔在液态钠表面的反应

Journal of The Chemical Society A: Inorganic, Physical, Theoretical Pub Date : 1971-01-01 DOI: 10.1039/J19710001704

C. C. Addison, M. Hobdell, R. J. Pulham

{"title":"The reactions of acetylene and propyne at the surface of liquid sodium","authors":"C. C. Addison, M. Hobdell, R. J. Pulham","doi":"10.1039/J19710001704","DOIUrl":"https://doi.org/10.1039/J19710001704","url":null,"abstract":"The reactions of acetylene and propyne at the surface of liquid sodium have been studied at 110, 150, and 200 °C. A fresh metal surface was maintained by magnetic stirring, so arranged that the metal poured continuously over a baffle plate. The course of the reactions was followed from pressure–time curves, and the i.r. spectra of the gas phase. At 110 °C, propyne reacts smoothly according to equation (i) and all hydrogen atoms produced at the 3MeCCH + 2Na → 2NaCCMe + MeCHCH2(i), surface of the metal are employed in the hydrogenation of propyne to propene. A smaller effect (probably polymerisation) also becomes evident at 200 °C. The behaviour of acetylene is markedly different, and the reaction proceeds in two stages. In the first, disodium acetylide (but no hydrogen acetylide) is formed, and the gas phase consists of hydrogen and ethylene in the ratio 1·42 : 1 at 150 °C. No ethane was detected. The second stage involves reaction of hydrogen with sodium metal, and this does not commence until all acetylene is removed from the gas phase. The results are discussed qualitatively in terms of the relative absorption of the gases at the sodium surface, which may have some analogies with their absorption coefficients at transition-metal surfaces.","PeriodicalId":17321,"journal":{"name":"Journal of The Chemical Society A: Inorganic, Physical, Theoretical","volume":"41 1","pages":"1704-1708"},"PeriodicalIF":0.0,"publicationDate":"1971-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86982343","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: 3

Crystal structures of the non-isomorphous potassium and rubidium acid salts of 5-bromo-3-hydroxy-6-methyluracil 5-溴-3-羟基-6-甲基尿嘧啶非同形钾、铷酸盐的晶体结构

Journal of The Chemical Society A: Inorganic, Physical, Theoretical Pub Date : 1971-01-01 DOI: 10.1039/J19710002077

M. Truter, B. Vickery

{"title":"Crystal structures of the non-isomorphous potassium and rubidium acid salts of 5-bromo-3-hydroxy-6-methyluracil","authors":"M. Truter, B. Vickery","doi":"10.1039/J19710002077","DOIUrl":"https://doi.org/10.1039/J19710002077","url":null,"abstract":"Three-dimensional X-ray crystal structure analyses have been carried out on the compounds MIH[C5H4BrN2O3]2. For MI= K, Z= 4 in a monoclinic unit cell having a= 14·884, b 14·779, c= 7·135 A, β= 97·61°, and space group l2/c. The cation lies on a two-fold axis which relates two anionic moieties with a short [2·42(2)A] hydrogen bond between oxygen atoms. The potassium is ten-co-ordinate and K–O distances range from 2·739–3·105(9)A, mean 2·944 A; each uracil chelates two potassium ions and makes one contact with a third. These K–O contacts and the ‘symmetrical’ hydrogen bond hold the structure in columns along the needle axis of the crystal, c. Hydrogen bonds N–H ⋯ O, 2·73(1)A, hold the columns together in the other two directions.For M1= Rb, Z= 4 in an orthorhombic unit cell having a= 5·995, b= 21·825, c= 11·932 A and space group lba2. The rubidium ion is on a two-fold axis and is six-co-ordinated by a trigonal prism of oxygen atoms at distances from 2·93–3·00(1)A, mean 2·977 A. The three oxygen atoms of one uracil moiety make contact with different rubidium ions and each oxygen with only one rubidium. Metal–oxygen contacts and hydrogen bonds [N–H ⋯ O 2·88(3) and O ⋯ O 2·42(5)A] hold the structure in layers; shortest contacts between the layers are Br ⋯ Me 3·59 and Br ⋯ Br 3·68 A. The shorter hydrogen bond joins N(3) oxygen atoms across a two-fold axis.The differences in structure are correlated with differences in the i.r. spectra.","PeriodicalId":17321,"journal":{"name":"Journal of The Chemical Society A: Inorganic, Physical, Theoretical","volume":"41 1","pages":"2077-2083"},"PeriodicalIF":0.0,"publicationDate":"1971-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85345618","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: 3

Magnetic double-resonance study of some derivatives of tungsten hexafluoride and tungsten oxotetrafluoride 六氟化钨和氧化四氟化钨衍生物的双磁共振研究

Journal of The Chemical Society A: Inorganic, Physical, Theoretical Pub Date : 1971-01-01 DOI: 10.1039/J19710000948

W. Mcfarlane, A. M. Noble, J. M. Winfield

引用次数: 31

Structural and mechanistic studies of co-ordination compounds. Part II. Preparation, aquation, and base hydrolysis of trans-chloronitro- and trans-bromonitro-tetra-amminecobalt(III) cations 配位化合物的结构和机理研究。第二部分。反氯硝基和反溴四胺钴(III)阳离子的制备、水化和碱水解

Journal of The Chemical Society A: Inorganic, Physical, Theoretical Pub Date : 1971-01-01 DOI: 10.1039/J19710002151

C. Poon, H. Tong

引用次数: 4

The vibrational spectra of systems containing linear or non-linear M–O–M linkages 包含线性或非线性M-O-M连杆系统的振动谱

Journal of The Chemical Society A: Inorganic, Physical, Theoretical Pub Date : 1971-01-01 DOI: 10.1039/J19710003569

I. R. Beattie, M. Gall

引用次数: 7

Trimethylsilyl derivatives for the study of silicate structures. Part II. Orthosilicate, pyrosilicate, and ring structures 用于硅酸盐结构研究的三甲基硅基衍生物。第二部分。正硅酸盐、焦硅酸盐和环状结构

Journal of The Chemical Society A: Inorganic, Physical, Theoretical Pub Date : 1971-01-01 DOI: 10.1039/J19710000686

J. Götz, C. R. Masson

引用次数: 36

Reactions of quinolin-8-ol with covalent halides. Part VI. Bis-π-cyclopentadienyldihalides of titanium, zirconium, and hafnium 喹啉-8-醇与共价卤化物的反应。第六部分:钛、锆、铪的双π-环戊二烯基二卤化物

Journal of The Chemical Society A: Inorganic, Physical, Theoretical Pub Date : 1971-01-01 DOI: 10.1039/J19710002487

J. Charalambous, M. Frazer, W. Newton

引用次数: 10

Photochemistry of tocoquinone-1 toco醌-1的光化学性质

Journal of The Chemical Society A: Inorganic, Physical, Theoretical Pub Date : 1971-01-01 DOI: 10.1039/J19710002248

G. Leary

引用次数: 8

Binuclear mixed-metal complexes formed by nickel(II) and other 3d bivalent ions with tripod ligands 由镍(II)和其他三维二价离子与三脚架配体形成的双核混合金属配合物

Journal of The Chemical Society A: Inorganic, Physical, Theoretical Pub Date : 1971-01-01 DOI: 10.1039/J19710003686

M. Bacci, R. Morassi, L. Sacconi

引用次数: 1