共查询到20条相似文献，搜索用时 109 毫秒
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面向 2 1世纪教学内容和课程体系改革正向深入发展 ,教材的改革和创新是一个重要方面。为借鉴国内外先进经验 ,在查阅有机化学参考书时 ,发现一本国外有机化学教材很适合在我国教材改革中参考。这本书是由ＷｉｌｌｉａｍＨ .Ｂｒｏｗｎ (ＢｅｌｏｉｔＣｏｌｌｅｇｅ)和ＣｈｒｉｓｔｏｐｈｅｒＳ .Ｆｏｏｔｅ(ＵｎｉｖｅｒｓｉｔｙｏｆＣａｌｉｆｏｒｎｉａ ,ＬｏｓＡｎｇｅｌｅｓ)合著、美国ＳａｕｎｄｅｒｓＣｏｌｌｅｇｅＰｕｂｌｉｓｈｉｎｇ 1 998年出版的《有机化学》第 2版 (ＯｒｇａｎｉｃＣｈｅｍｉｓｔｒｙ———ＳｅｃｏｎｄＥｄ… 相似文献
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Werner Fürbringer 《Journal of Thermal Analysis and Calorimetry》1991,37(6):1131-1134
List of publications of Prof. Dr. H. J. Seifert 相似文献
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SCF MO calculations have been made for Hafner's hydrocarbons using neglect of differential overlap after the manner ofPople andPariser andParr.
* transitions have been calculated by a limited configuration interaction method. The results show that agreement between predicted spectra and observed spectra is quite good for the heptalene derivative and reasonably good for the pentalene derivative. It is suggested that both molecules are aromatic in contradiction to predictions by Craig's rule.
Zusammenfassung SCF MO-Rechnungen mit zero differential overlap nach der Methode vonPople, Pariser undParr wurden fürHafner's Kohlenwasserstoff angestellt. Mittels begrenzter Konfigurationswechselwirkung (wurden)die *-Übergänge berechnet, wobei die Ergebnisse im Fall des Heptalen-Derivates verhältnismäßig gut, in dem des Pentalen-Derivates jedoch nur ungefähr mit dem Experiment übereinstimmen. Darüber hinaus sprechen die Resultate im Gegensatz zur Craig'schen Regel dafür, daß beide Moleküle aromatischen Charakter haben.
Résumé Nous avons effectué des calculs SCF MO pour les hydrocarbures deHafner, en négligeant le recouvrement différentiel d'aprèsPople etPariser etParr. Quelques transitions * ont été calculées par interaction de configurations limitée. L'accord avec l'expérience est assez bon pour le dérivé de l'heptalène, et raisonable pour le dérivé du pentalène. Les deux molécules semblent être aromatiques, contrairement à la règle de Craig.相似文献
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Rolf Mülhaupt 《Macromolecular rapid communications》2005,26(3):201-201
This section contains news of the macromolecular community all over the world. Articles about, for example, people, projects, and market trends are welcome. Suggestions should be sent to the editorial office of the Macromolecular journals, preferably by E‐mail to macromol@wiley‐vch.de. The editorial office decides which articles will be published. 相似文献
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The preparation of substituted pyridines from cycloalkanones by elaboration of an aromatic ring is described. 相似文献
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An E.P.R. study of peptides after U.V. irradiation 总被引：1，自引：0，他引：1
Abstract— Various peptides of Gly, Ala, Phe, Tyr, and Trp have been irradiated with U.V. light in the solid state or in frozen aqueous solution. The radicals produced were studied by E.P.R. spectroscopy at low temperature and at room temperature. Radicals seem to occur preferentially on Gly or Ala when in the C-terminal position and there is evidence for a photosensitization of these amino acids by aromatic amino acids. 相似文献
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