Pub Date : 1981-01-01Epub Date: 2003-05-20DOI: 10.1016/0022-1902(81)80431-9
Y. Eckstein, P. Dreyfuss
Reactions between tetrahydrofuran (THF) and 22 different perchlorate salts, most often in the presence of organic halides were studied. The use of the organic halides including acetyl, benzoyl and substituted allyl chlorides aided in arranging the perchlorates according to their ability to give good yields of tertiary oxonium ion and polymer from THF. The approximate order, based on the yield of poly(tetrahydrofuran) obtained after 24 hr was Ag+, Hg2+ > Pb2+, Tl3+ > Fe3+, Al3+, Na+, Fe2+ > Cr3+, Mn2+, Ni2+, Cu2+, Co2+, Cd2+ ⪢ Ce3+, Mg2+, Ca2+, Ba2+, Zn2+, Li+, K+, NH4+ = 0. Only Ag+ and Hg2+ perchlorates gave polymer when allylhalides were used. With one other perchlorates the order of reactivity of the halide was acetyl > benzoyl ⪢ allyl = 0.
{"title":"Reactions between perchlorate salts and tetrahydrofuran","authors":"Y. Eckstein, P. Dreyfuss","doi":"10.1016/0022-1902(81)80431-9","DOIUrl":"10.1016/0022-1902(81)80431-9","url":null,"abstract":"<div><p>Reactions between tetrahydrofuran (THF) and 22 different perchlorate salts, most often in the presence of organic halides were studied. The use of the organic halides including acetyl, benzoyl and substituted allyl chlorides aided in arranging the perchlorates according to their ability to give good yields of tertiary oxonium ion and polymer from THF. The approximate order, based on the yield of poly(tetrahydrofuran) obtained after 24 hr was Ag<sup>+</sup>, Hg<sup>2+</sup> > Pb<sup>2+</sup>, Tl<sup>3+</sup> > Fe<sup>3+</sup>, Al<sup>3+</sup>, Na<sup>+</sup>, Fe<sup>2+</sup> > Cr<sup>3+</sup>, Mn<sup>2+</sup>, Ni<sup>2+</sup>, Cu<sup>2+</sup>, Co<sup>2+</sup>, Cd<sup>2+</sup> ⪢ Ce<sup>3+</sup>, Mg<sup>2+</sup>, Ca<sup>2+</sup>, Ba<sup>2+</sup>, Zn<sup>2+</sup>, Li<sup>+</sup>, K<sup>+</sup>, NH<sub>4</sub><sup>+</sup> = 0. Only Ag<sup>+</sup> and Hg<sup>2+</sup> perchlorates gave polymer when allylhalides were used. With one other perchlorates the order of reactivity of the halide was acetyl > benzoyl ⪢ allyl = 0.</p></div>","PeriodicalId":16275,"journal":{"name":"Journal of Inorganic and Nuclear Chemistry","volume":"43 1","pages":"Pages 23-27"},"PeriodicalIF":0.0,"publicationDate":"1981-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-1902(81)80431-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72920946","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}
Pub Date : 1981-01-01Epub Date: 2003-05-20DOI: 10.1016/0022-1902(81)80647-1
F. David, K. Samhoun, E.K. Hulet, P.A. Baisden, R. Dougan, J.H. Landrum, R.W. Lougheed, J.F. Wild, G.D. O'Kelley
The possible existence of a monovalent ion of mendelevium has been examined further by radiopolarography. Experiments were conducted in several aqueous media with 241Am, 249Cf, 254Es, 255,256Fm and 256Md tracers. Half-wave amalgamation potentials of Md in tetramethylammonium perchlorate and in LiCl were identical within the experimental errors at −1.755 ± 0.005 V vs the saturated calomel electrode, in good agreement with an earlier study by radiocoulometry in an ammonium acetate medium. No shift in the half-wave potential of Md was observed due to NH4+ or Cl− ions; hence, these ions do not act as complexing agents for Md ions present during electrochemical reductions. The shift in the half-wave potential observed in the presence of citrate as a complexing agent was characteristic of the reduction process Md2+ → Md0(Hg). In noncomplexing media, the slope of the logarithmically transformed wave of Md was ∼ 30 mV, consistent only with a reversible, two-electron reduction process. All of our results provide evidence for electrochemical reduction of the Md2+ ion only and disprove the existence of an the intermediate Md+ ion in aqueous solution with properties like those of Cs+, Ag+ or Cu+.
{"title":"Radiopolarography of mendelevium in aqueous solutions","authors":"F. David, K. Samhoun, E.K. Hulet, P.A. Baisden, R. Dougan, J.H. Landrum, R.W. Lougheed, J.F. Wild, G.D. O'Kelley","doi":"10.1016/0022-1902(81)80647-1","DOIUrl":"10.1016/0022-1902(81)80647-1","url":null,"abstract":"<div><p>The possible existence of a monovalent ion of mendelevium has been examined further by radiopolarography. Experiments were conducted in several aqueous media with <sup>241</sup>Am, <sup>249</sup>Cf, <sup>254</sup>Es, <sup>255,256</sup>Fm and <sup>256</sup>Md tracers. Half-wave amalgamation potentials of Md in tetramethylammonium perchlorate and in LiCl were identical within the experimental errors at −1.755 ± 0.005 V vs the saturated calomel electrode, in good agreement with an earlier study by radiocoulometry in an ammonium acetate medium. No shift in the half-wave potential of Md was observed due to NH<sub>4</sub><sup>+</sup> or Cl<sup>−</sup> ions; hence, these ions do not act as complexing agents for Md ions present during electrochemical reductions. The shift in the half-wave potential observed in the presence of citrate as a complexing agent was characteristic of the reduction process Md<sup>2+</sup> → Md<sup>0</sup>(Hg). In noncomplexing media, the slope of the logarithmically transformed wave of Md was ∼ 30 mV, consistent only with a reversible, two-electron reduction process. All of our results provide evidence for electrochemical reduction of the Md<sup>2+</sup> ion only and disprove the existence of an the intermediate Md<sup>+</sup> ion in aqueous solution with properties like those of Cs<sup>+</sup>, Ag<sup>+</sup> or Cu<sup>+</sup>.</p></div>","PeriodicalId":16275,"journal":{"name":"Journal of Inorganic and Nuclear Chemistry","volume":"43 11","pages":"Pages 2941-2945"},"PeriodicalIF":0.0,"publicationDate":"1981-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-1902(81)80647-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84685094","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}
Pub Date : 1981-01-01Epub Date: 2003-05-20DOI: 10.1016/0022-1902(81)80089-9
G. Bombieri , F. Benetollo, R.M. Rojas, M.L. De Paz
The title compound crystallizes in the triclinic system, space group with a = 11.512(3), b = 9.387(3), c = 6.757(2) Å, α = 105.6(4), β = 96.8(4) and γ = 107.0(4)° and Z = 2. The structure is built up from two distinct coordination polyhedra, one is formed by the uranium which is at a centre of a pentagonal bipyramid, the other by the potassium cations heptacoordinate to oxygen atoms either belonging to the maleic ligands or to the uranyl group. The uranium polyhedra are connected through bridging maleato groups. The maleato-U-maleato chains in the direction of the c axis are held together through the potassium coordination polyhedra.
{"title":"Structural studies on the actinide carboxylates (VII) The crystal and molecular structure of potassium maleate hydrogenmaleate dioxouranate (VI); [UO2(C4H2O4)K(C4H3O4)]","authors":"G. Bombieri , F. Benetollo, R.M. Rojas, M.L. De Paz","doi":"10.1016/0022-1902(81)80089-9","DOIUrl":"10.1016/0022-1902(81)80089-9","url":null,"abstract":"<div><p>The title compound crystallizes in the triclinic system, space group <span><math><mtext>P</mtext><mtext>1</mtext></math></span> with a = 11.512(3), b = 9.387(3), c = 6.757(2) Å, α = 105.6(4), β = 96.8(4) and γ = 107.0(4)° and Z = 2. The structure is built up from two distinct coordination polyhedra, one is formed by the uranium which is at a centre of a pentagonal bipyramid, the other by the potassium cations heptacoordinate to oxygen atoms either belonging to the maleic ligands or to the uranyl group. The uranium polyhedra are connected through bridging maleato groups. The maleato-U-maleato chains in the direction of the <em>c</em> axis are held together through the potassium coordination polyhedra.</p></div>","PeriodicalId":16275,"journal":{"name":"Journal of Inorganic and Nuclear Chemistry","volume":"43 12","pages":"Pages 3203-3207"},"PeriodicalIF":0.0,"publicationDate":"1981-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-1902(81)80089-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75585891","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}
Pub Date : 1981-01-01Epub Date: 2003-05-20DOI: 10.1016/0022-1902(81)80646-X
C. Musikas , R.G. Haire, J.R. Peterson
D.c. polarographic and cyclic voltammetric studies have been carried out on aqueous solutions (10−4−10−3 M) of 249Cf, Sm and Gd. From the present data and the established electrochemical behavior of Sm and Gd, it can be inferred that Cf(III) is reduced in two steps at the mercury-drop electrode, first to Cf(II), followed by the Cf(II) being reduced to Cf(Hg). The potentials for the two electrochemical steps are −1.47 and −1.68V vs NHE, respectively.
对249Cf、Sm和Gd的水溶液(10−4−10−3 M)进行了直流极谱和循环伏安研究。从目前的数据和Sm和Gd的电化学行为可以推断，Cf(III)在汞滴电极上被还原为两个步骤，首先是Cf(II)，然后Cf(II)被还原为Cf(Hg)。这两个电化学步骤的电位分别为- 1.47和- 1.68V vs NHE。
{"title":"Electrochemical studies of trivalent californium and selected trivalent lanthanides in aqueous solution","authors":"C. Musikas , R.G. Haire, J.R. Peterson","doi":"10.1016/0022-1902(81)80646-X","DOIUrl":"10.1016/0022-1902(81)80646-X","url":null,"abstract":"<div><p>D.c. polarographic and cyclic voltammetric studies have been carried out on aqueous solutions (10<sup>−4</sup>−10<sup>−3</sup> M) of <sup>249</sup>Cf, Sm and Gd. From the present data and the established electrochemical behavior of Sm and Gd, it can be inferred that Cf(III) is reduced in two steps at the mercury-drop electrode, first to Cf(II), followed by the Cf(II) being reduced to Cf(Hg). The potentials for the two electrochemical steps are −1.47 and −1.68V vs NHE, respectively.</p></div>","PeriodicalId":16275,"journal":{"name":"Journal of Inorganic and Nuclear Chemistry","volume":"43 11","pages":"Pages 2935-2940"},"PeriodicalIF":0.0,"publicationDate":"1981-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-1902(81)80646-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89844234","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}
Pub Date : 1981-01-01Epub Date: 2003-05-20DOI: 10.1016/0022-1902(81)90031-2
C.A. Cody, L. Dicarlo, R.K. Darlington
{"title":"Differential scanning calorimetric and Raman spectroscopic study of polymorphism in Na2SO4","authors":"C.A. Cody, L. Dicarlo, R.K. Darlington","doi":"10.1016/0022-1902(81)90031-2","DOIUrl":"10.1016/0022-1902(81)90031-2","url":null,"abstract":"","PeriodicalId":16275,"journal":{"name":"Journal of Inorganic and Nuclear Chemistry","volume":"43 2","pages":"Pages 398-400"},"PeriodicalIF":0.0,"publicationDate":"1981-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-1902(81)90031-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83659847","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}
Pub Date : 1981-01-01DOI: 10.1016/0022-1902(81)80024-3
K. Ogura, Masahiro Watanabe
{"title":"Spectroscopic, electrochemical and photochemical properties of brown ring compounds","authors":"K. Ogura, Masahiro Watanabe","doi":"10.1016/0022-1902(81)80024-3","DOIUrl":"https://doi.org/10.1016/0022-1902(81)80024-3","url":null,"abstract":"","PeriodicalId":16275,"journal":{"name":"Journal of Inorganic and Nuclear Chemistry","volume":"70 1","pages":"1239-1241"},"PeriodicalIF":0.0,"publicationDate":"1981-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75318866","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}
Pub Date : 1981-01-01DOI: 10.1016/0022-1902(81)80496-4
G. K. Joshi, M. Bhutra, S. Misra
{"title":"Spectroscopic studies of Nd(III) Schiff-base complexes","authors":"G. K. Joshi, M. Bhutra, S. Misra","doi":"10.1016/0022-1902(81)80496-4","DOIUrl":"https://doi.org/10.1016/0022-1902(81)80496-4","url":null,"abstract":"","PeriodicalId":16275,"journal":{"name":"Journal of Inorganic and Nuclear Chemistry","volume":"24 1","pages":"525-531"},"PeriodicalIF":0.0,"publicationDate":"1981-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75596605","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}
Pub Date : 1981-01-01DOI: 10.1016/0022-1902(81)80203-5
F. Capitán, L. Capitán-Vallvey, J. Vílchez
{"title":"Study of 2-(o-carboxyphenyliminomethyl)pyridine acid and its ferrous complexes","authors":"F. Capitán, L. Capitán-Vallvey, J. Vílchez","doi":"10.1016/0022-1902(81)80203-5","DOIUrl":"https://doi.org/10.1016/0022-1902(81)80203-5","url":null,"abstract":"","PeriodicalId":16275,"journal":{"name":"Journal of Inorganic and Nuclear Chemistry","volume":"118 1","pages":"683-688"},"PeriodicalIF":0.0,"publicationDate":"1981-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77440181","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}
Pub Date : 1981-01-01DOI: 10.1016/0022-1902(81)80020-6
G. K. Pagenkopf, C. Whitworth
{"title":"Precipitation of metal-humate complexes","authors":"G. K. Pagenkopf, C. Whitworth","doi":"10.1016/0022-1902(81)80020-6","DOIUrl":"https://doi.org/10.1016/0022-1902(81)80020-6","url":null,"abstract":"","PeriodicalId":16275,"journal":{"name":"Journal of Inorganic and Nuclear Chemistry","volume":"17 1","pages":"1219-1222"},"PeriodicalIF":0.0,"publicationDate":"1981-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85895233","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}
Pub Date : 1981-01-01DOI: 10.1016/0022-1902(81)90016-6
A. S. Shawali, M. Naoum, Nahed F. Abdelfattah
{"title":"Linear free energy relationships for Fe(III) complexes with aroylacetanilides","authors":"A. S. Shawali, M. Naoum, Nahed F. Abdelfattah","doi":"10.1016/0022-1902(81)90016-6","DOIUrl":"https://doi.org/10.1016/0022-1902(81)90016-6","url":null,"abstract":"","PeriodicalId":16275,"journal":{"name":"Journal of Inorganic and Nuclear Chemistry","volume":"14 1","pages":"315-322"},"PeriodicalIF":0.0,"publicationDate":"1981-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79596826","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}
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