کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1311654 | 975339 | 2007 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Presence of edge-to-face aromatic interaction in bis[1,2-bis(4-alkylphenyl)ethanedione dioximato]nickel(II) complexes and evaluation of the fastener effect Presence of edge-to-face aromatic interaction in bis[1,2-bis(4-alkylphenyl)ethanedione dioximato]nickel(II) complexes and evaluation of the fastener effect](/preview/png/1311654.png)
Bis[1,2-bis(4-methylphenyl)ethanedione dioximato]nickel(II), [Ni{(C1)2dpg}2] (1), was found to exhibit shift in diffuse reflectance spectra from the corresponding non-methyl species. Characterization by X-ray crystal structural analysis on 1 and bis[1,2-bis(4-n-hexylphenyl)ethanedione dioximato]nickel(II), [Ni{(C6)2dpg}2] (2), revealed the presence of the edge-to-face aromatic interactions caused by the electron-donating effect of the methyl and hexyl groups. The Ni(dpg)2 units of complex 2 stack (staggered by 90°) at alternate intervals of 3.151 Å and 3.253 Å. Thus, the shift in the d–p transition of 2 was found to contain 43% of the effect of the edge-to-face aromatic interaction, together with 57% of the reported fastener effect.
Methyl and hexyl substituted [Ni(dpg)2] complexes have been prepared. The Ni(dpg)2 core units of these alkyl substituted [Ni(dpg)2] complex were closely packed due to the edge-to-face aromatic interactions caused by the electron-donating effect of the alkyl groups.Figure optionsDownload as PowerPoint slide
Journal: Inorganica Chimica Acta - Volume 360, Issue 9, 10 June 2007, Pages 3123–3126