1 H N.m.r. coupling constants obtained from spectral analysis of cyclohepta-1,3-diene (1) at 300 MHz are not in accord with an earlier propose Cs structure in which all but one of the carbon atoms are coplanar; instead these data indicated a distroted tub conformation of C2 symmetry.
从环庚-1,3-二烯(1)在300 MHz的光谱分析中得到的1 H N.m.r.耦合常数不符合先前提出的除一个碳原子外所有碳原子共面的Cs结构;相反，这些数据表明了C2对称的扭曲桶形构象。
{"title":"Structure of cyclohepta-1,3-diene from nuclear magnetic resonance analysis","authors":"Philip Crews","doi":"10.1039/C29710000583","DOIUrl":"https://doi.org/10.1039/C29710000583","url":null,"abstract":"1 H N.m.r. coupling constants obtained from spectral analysis of cyclohepta-1,3-diene (1) at 300 MHz are not in accord with an earlier propose Cs structure in which all but one of the carbon atoms are coplanar; instead these data indicated a distroted tub conformation of C2 symmetry.","PeriodicalId":17278,"journal":{"name":"Journal of The Chemical Society D: Chemical Communications","volume":"91 1","pages":"583-584"},"PeriodicalIF":0.0,"publicationDate":"1971-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80856318","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}
The alkaloids mesembrine (1; R1= R2= O) and mesembrenone (2) undergo a novel oxidation with diethyl azodicarboxylate to afford the β-enaminoketones (4) and (6), respectively.
{"title":"The reaction of mesembrine and mesembrenone with diethyl azodicarboxylate","authors":"P. Jeffs, H. F. Campbell, R. Hawks","doi":"10.1039/C2971001338B","DOIUrl":"https://doi.org/10.1039/C2971001338B","url":null,"abstract":"The alkaloids mesembrine (1; R1= R2= O) and mesembrenone (2) undergo a novel oxidation with diethyl azodicarboxylate to afford the β-enaminoketones (4) and (6), respectively.","PeriodicalId":17278,"journal":{"name":"Journal of The Chemical Society D: Chemical Communications","volume":"37 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1971-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80892781","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}
Under suitable conditions, silver–silver chloride and hydrogen electrodes operate reversibly in acetonitrile–methanol mixtures; the free energy of transfer of H+Cl– from methanol to acetonitrile–methanol (40:60) has been determined from the results of cell measurements.
{"title":"Behaviour of hydrogen and silver–silver chloride electrodes in acetonitrile solutions","authors":"H. P. Bennetto, J. Spitzer","doi":"10.1039/C29710000990","DOIUrl":"https://doi.org/10.1039/C29710000990","url":null,"abstract":"Under suitable conditions, silver–silver chloride and hydrogen electrodes operate reversibly in acetonitrile–methanol mixtures; the free energy of transfer of H+Cl– from methanol to acetonitrile–methanol (40:60) has been determined from the results of cell measurements.","PeriodicalId":17278,"journal":{"name":"Journal of The Chemical Society D: Chemical Communications","volume":"83 1","pages":"990-991"},"PeriodicalIF":0.0,"publicationDate":"1971-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81013121","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}
The X-ray structure analysis of what was believed to be a copper(II) complex of adenine N1-oxide showed that it was a complex of its degradation product, 4-aminoimidazole-5-carboxamide oxime.
{"title":"Crystal structure of bis-(4-aminoimidazole-5-carboxamide oxime)copper(II) perchlorate. A degradation product of adenine N1-oxide","authors":"M. Sundaralingam, C. Stout, S. Hecht","doi":"10.1039/C29710000240","DOIUrl":"https://doi.org/10.1039/C29710000240","url":null,"abstract":"The X-ray structure analysis of what was believed to be a copper(II) complex of adenine N1-oxide showed that it was a complex of its degradation product, 4-aminoimidazole-5-carboxamide oxime.","PeriodicalId":17278,"journal":{"name":"Journal of The Chemical Society D: Chemical Communications","volume":"51 1","pages":"240-241"},"PeriodicalIF":0.0,"publicationDate":"1971-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81109480","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}
Treatment of the compound π-C5H5Fe(dmpe)I (dmpe = Me2PCH2CH2PMe2) in acetone with TlBF4 and nitrogen gas yields the binuclear dinitrogen complex {[π–C5H5Fe(dmpe)]2N2}2+(BF4–)2, 2H2O which readily reacts with carbon monoxide and LiAlH4 giving the complexes [π–C5H5Fe(dmpe)CO]+BF4– and π–C5H5Fe(dmpe)H, respectively.
{"title":"Formation of a cationic binuclear iron–dinitrogen compound from molecular nitrogen","authors":"W. Silverthorn","doi":"10.1039/C29710001310","DOIUrl":"https://doi.org/10.1039/C29710001310","url":null,"abstract":"Treatment of the compound π-C5H5Fe(dmpe)I (dmpe = Me2PCH2CH2PMe2) in acetone with TlBF4 and nitrogen gas yields the binuclear dinitrogen complex {[π–C5H5Fe(dmpe)]2N2}2+(BF4–)2, 2H2O which readily reacts with carbon monoxide and LiAlH4 giving the complexes [π–C5H5Fe(dmpe)CO]+BF4– and π–C5H5Fe(dmpe)H, respectively.","PeriodicalId":17278,"journal":{"name":"Journal of The Chemical Society D: Chemical Communications","volume":"114 1","pages":"1310-1311"},"PeriodicalIF":0.0,"publicationDate":"1971-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78586257","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}
The carbonyl–diphosphine bridged dimer [(π-C5H5)Fe(CO)]2[Ph2P(CH2)3PPh2]{Fe2(diphos)} is reversibly oxidized electrochemically to the cation Fe2(diphos)+ which disproportionates in acetonitrile and is further oxidized to the transient dication Fe2(diphos)2+.
{"title":"Reversible oxidations in ditertiary-phosphine bridged derivatives of [(π-C5H5)Fe(CO)2]2","authors":"J. Ferguson, T. Meyer","doi":"10.1039/C29710001544","DOIUrl":"https://doi.org/10.1039/C29710001544","url":null,"abstract":"The carbonyl–diphosphine bridged dimer [(π-C5H5)Fe(CO)]2[Ph2P(CH2)3PPh2]{Fe2(diphos)} is reversibly oxidized electrochemically to the cation Fe2(diphos)+ which disproportionates in acetonitrile and is further oxidized to the transient dication Fe2(diphos)2+.","PeriodicalId":17278,"journal":{"name":"Journal of The Chemical Society D: Chemical Communications","volume":"16 1","pages":"1544-1545"},"PeriodicalIF":0.0,"publicationDate":"1971-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78562401","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}
J. Carruthers, S. Cerrini, W. Fedeli, C. Casinovi, C. Galeffi, A. Vaccaro, A. Scala
The structures of cochlioquinones A and B, new metabolites isolated from a strain of Cochliobolus miyabeanus, have been determined from chemical, spectroscopic, and crystallographic evidence, the main feature being a p-benzoquinone ring linked to a sesquiterpene moiety and to a C7 side-chain.
{"title":"Structures of cochlioquinones A and B, new metabolites of Cochliobolus miyabeanus: chemical and X-ray crystallographic determination","authors":"J. Carruthers, S. Cerrini, W. Fedeli, C. Casinovi, C. Galeffi, A. Vaccaro, A. Scala","doi":"10.1039/C29710000164","DOIUrl":"https://doi.org/10.1039/C29710000164","url":null,"abstract":"The structures of cochlioquinones A and B, new metabolites isolated from a strain of Cochliobolus miyabeanus, have been determined from chemical, spectroscopic, and crystallographic evidence, the main feature being a p-benzoquinone ring linked to a sesquiterpene moiety and to a C7 side-chain.","PeriodicalId":17278,"journal":{"name":"Journal of The Chemical Society D: Chemical Communications","volume":"6 1","pages":"164-166"},"PeriodicalIF":0.0,"publicationDate":"1971-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73617944","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}
The 13C n.m.r. spectra of the complexes [LM-(CO)3], (L = Mesitylene, Durene, or Cycloheptatriene; M = Cr, Mo, W), and 1J(183W–13CO) for [(durene) W(CO)3] are reported and the 13C chemical shifts are discussed.
{"title":"The 13C nuclear magnetic resonance spectra of the complexes [LM(CO)3], L = mesitylene, durene, or cycloheptatriene; M = Cr, Mo, W","authors":"B. Mann","doi":"10.1039/C29710000976","DOIUrl":"https://doi.org/10.1039/C29710000976","url":null,"abstract":"The 13C n.m.r. spectra of the complexes [LM-(CO)3], (L = Mesitylene, Durene, or Cycloheptatriene; M = Cr, Mo, W), and 1J(183W–13CO) for [(durene) W(CO)3] are reported and the 13C chemical shifts are discussed.","PeriodicalId":17278,"journal":{"name":"Journal of The Chemical Society D: Chemical Communications","volume":"51 1","pages":"976-977"},"PeriodicalIF":0.0,"publicationDate":"1971-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82050089","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}
Stable phosphiniminophosphonium salts of the hitherto unknown dimethyltetrafluorophosphate anion, [Me2P(NPR3)2]+[Me2PF4]–, have been prepared in the reaction of dimethyltrifluorophosphorane with several N-trimethylsilylphosphine imines.
{"title":"Salts of the dimethyltetrafluorophospate, [Me2PF4]–, anion","authors":"W. Stadelmann, O. Stelzer, R. Schmutzler","doi":"10.1039/C29710001456","DOIUrl":"https://doi.org/10.1039/C29710001456","url":null,"abstract":"Stable phosphiniminophosphonium salts of the hitherto unknown dimethyltetrafluorophosphate anion, [Me2P(NPR3)2]+[Me2PF4]–, have been prepared in the reaction of dimethyltrifluorophosphorane with several N-trimethylsilylphosphine imines.","PeriodicalId":17278,"journal":{"name":"Journal of The Chemical Society D: Chemical Communications","volume":"73 1","pages":"1456-1456"},"PeriodicalIF":0.0,"publicationDate":"1971-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85709005","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}
(±)-Δ8(12)-15-Dehydro-PGE1(III), (±)-Δ8(12)-PGE1(IV), and (±)-15-epi-Δ8(12)-PGE1(V) have been synthesized from the readily available starting material (I), and compound (III) has been stereoselectively reduced by micro-organisms to either (+)- or (–)-(V).
{"title":"The microbial transformation of prostaglandins","authors":"M. Miyano, C. Dorn, F. Colton, W. J. Marsheck","doi":"10.1039/C29710000425","DOIUrl":"https://doi.org/10.1039/C29710000425","url":null,"abstract":"(±)-Δ8(12)-15-Dehydro-PGE1(III), (±)-Δ8(12)-PGE1(IV), and (±)-15-epi-Δ8(12)-PGE1(V) have been synthesized from the readily available starting material (I), and compound (III) has been stereoselectively reduced by micro-organisms to either (+)- or (–)-(V).","PeriodicalId":17278,"journal":{"name":"Journal of The Chemical Society D: Chemical Communications","volume":"9 1","pages":"425-425"},"PeriodicalIF":0.0,"publicationDate":"1971-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84143420","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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