教師資料查詢 | 類別: 期刊論文 | 教師: 魏和祥 WEI, HO-HSIANG (瀏覽個人網頁)

標題:Intraligand substituent effect on high-spin(5T2) low-spin(1A1)transition in solid(dithiocyanato)bis(N-R-2-pyridinaldimine)iron(II)
學年74
學期1
出版(發表)日期1985/12/01
作品名稱Intraligand substituent effect on high-spin(5T2) low-spin(1A1)transition in solid(dithiocyanato)bis(N-R-2-pyridinaldimine)iron(II)
作品名稱(其他語言)
著者魏和祥; Wei, Ho-hsiang; 高世平; Kao, S. P.
單位淡江大學化學學系
出版者臺北市中國化學學會
著錄名稱、卷期、頁數中國化學會會誌=Journal of the Chinese Chemical Society 32(4)頁399-403
摘要The spin transition of high-spin (/sup 5/T/sub 2/).harlor.low-spin (/sup 1/A/sub 1/) of (dithiocyanato) (N-phenyl-2-pyridinaldimine) iron (II) complexes can be altered by substituents on the phenyl ring. Mossbauer spectra at 78 K for the 4-substituted derivatives (with the exception of the 4-OH-substituted derivative) indicate that the fraction of low-spin states increases with decreasing substituent electron-withdrawing ability, as measured by the Hammet .sigma. constant (4-OCH/sub 3/<4-CH/sub 3/CONH 4-C/sub 6/H/sub 5/<4-CH/sub 3/<4-H<4-Cl<4-NO/sub 2/). In addition, the effect of methyl-substitution at the ortho-, meta- or paraposition of the phenyl ring on the apin transition was examined. Mossbauer spectra of these methyl-substituted complexes reveal quite different spin equilibria.
The spin transition of high-spin (/sup 5/T/sub 2/).harlor.low-spin (/sup 1/A/sub 1/) of (dithiocyanato) (N-phenyl-2-pyridinaldimine) iron (II) complexes can be altered by substituents on the phenyl ring. Mossbauer spectra at 78 K for the 4-substituted derivatives (with the exception of the 4-OH-substituted derivative) indicate that the fraction of low-spin states increases with decreasing substituent electron-withdrawing ability, as measured by the Hammet .sigma. constant (4-OCH/sub 3/<4-CH/sub 3/CONH 4-C/sub 6/H/sub 5/<4-CH/sub 3/<4-H<4-Cl<4-NO/sub 2/). In addition, the effect of methyl-substitution at the ortho-, meta- or paraposition of the phenyl ring on the apin transition was examined. Mossbauer spectra of these methyl-substituted complexes reveal quite different spin equilibria.
關鍵字
語言英文(美國)
ISSN0009-4536
期刊性質國內
收錄於SCI;
產學合作
通訊作者
審稿制度
國別中華民國
公開徵稿
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