کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5204534 | 1381964 | 2006 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
On the dehydrogenation of N,Nâ²-substituted p-phenylenediamine antioxidants. I. N-Phenyl-Nâ²-isopropyl-p-phenylenediamine (IPPD)
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Using B3LYP/6-31Gâ treatment, the optimal geometries, electronic structures and IR spectra of N-phenyl-Nâ²-isopropyl-p-phenylenediamine antioxidant (IPPD) and its doubly dehydrogenated oxidation products have been obtained. Experimental IR spectra of IPPD sample heated in air at 140 °C correspond to the doubly dehydrogenated IPPD structure with the Phenyl-NC double bond and not to its N,Nâ²-dehydrogenated quinonediimine-type counterpart as supposed in the literature. This finding supports the idea of preferential dehydrogenation at N-bonded tertiary carbon atom in comparison with the amine nitrogen bonded to two phenyl rings.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer Degradation and Stability - Volume 91, Issue 8, August 2006, Pages 1775-1780
Journal: Polymer Degradation and Stability - Volume 91, Issue 8, August 2006, Pages 1775-1780
نویسندگان
Júlia Polovková, Ingrid KortiÅ¡ová, Anton Gatial, Martin Breza,