{"title":"吡咯的研究。十六。6-芳基-6-二甲基氨基-2-氮杂环烯[2-芳基(二甲基氨基)亚甲基]构象研究","authors":"C. Candy, R. Jones","doi":"10.1039/J29710001405","DOIUrl":null,"url":null,"abstract":"The energy barriers to rotation about the C(6)–N bond of a series of 6-p-substituted phenyl-6-dimethylamino-2-azafulvenes have been studied by n.m.r. spectroscopy and have been found to have values in the range 58·58 to 64·43 kJ/mol. The lack of a correlation between the electronic effect of the para-substituent and the rotational-energy barriers suggest a lack of coplanarity between the rings with a consequent reduction in the cross conjugation within the system.","PeriodicalId":17268,"journal":{"name":"Journal of The Chemical Society B: Physical Organic","volume":"1B 1","pages":"1405-1406"},"PeriodicalIF":0.0000,"publicationDate":"1971-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"4","resultStr":"{\"title\":\"Pyrrole studies. Part XVI. Conformational studies of 6-aryl-6-di-methylamino-2-azafulvenes [2-aryl(dimethylamino)methylenepyrroles]\",\"authors\":\"C. Candy, R. Jones\",\"doi\":\"10.1039/J29710001405\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The energy barriers to rotation about the C(6)–N bond of a series of 6-p-substituted phenyl-6-dimethylamino-2-azafulvenes have been studied by n.m.r. spectroscopy and have been found to have values in the range 58·58 to 64·43 kJ/mol. The lack of a correlation between the electronic effect of the para-substituent and the rotational-energy barriers suggest a lack of coplanarity between the rings with a consequent reduction in the cross conjugation within the system.\",\"PeriodicalId\":17268,\"journal\":{\"name\":\"Journal of The Chemical Society B: Physical Organic\",\"volume\":\"1B 1\",\"pages\":\"1405-1406\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1971-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"4\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of The Chemical Society B: Physical Organic\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1039/J29710001405\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of The Chemical Society B: Physical Organic","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1039/J29710001405","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Pyrrole studies. Part XVI. Conformational studies of 6-aryl-6-di-methylamino-2-azafulvenes [2-aryl(dimethylamino)methylenepyrroles]
The energy barriers to rotation about the C(6)–N bond of a series of 6-p-substituted phenyl-6-dimethylamino-2-azafulvenes have been studied by n.m.r. spectroscopy and have been found to have values in the range 58·58 to 64·43 kJ/mol. The lack of a correlation between the electronic effect of the para-substituent and the rotational-energy barriers suggest a lack of coplanarity between the rings with a consequent reduction in the cross conjugation within the system.
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