کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6615825 | 459622 | 2013 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Temperature-dependent reduction pathways of complexes fac-[Re(CO)3(N-R-imidazole)(1,10-phenanthroline)]+ (RÂ =Â H, CH3)
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Temperature-dependent reduction pathways of complexes fac-[Re(CO)3(N-R-imidazole)(1,10-phenanthroline)]+ (RÂ =Â H, CH3) Temperature-dependent reduction pathways of complexes fac-[Re(CO)3(N-R-imidazole)(1,10-phenanthroline)]+ (RÂ =Â H, CH3)](/preview/png/6615825.png)
چکیده انگلیسی
Peculiar reduction pathways of the complexes fac-[Re(imH)(CO)3(phen)]+ and fac-[Re(imCH3)(CO)3(phen)]+ (imH = imidazole, imCH3 = N-methylimidazole and phen = 1,10-phenanthroline) have been unravelled by performing combined cyclic voltammetric and in situ IR spectroelectrochemical experiments. In the temperature range of 293-233 K, the initial reduction of the phen ligand in [Re(imH)(CO)3(phen)]+ results in irreversible conversion of the imidazole ligand to 3-imidazolate by a rapid phen
- â â imH intramolecular electron transfer coupled with NH bond cleavage. This process is followed by second phen-localized 1eâ reduction producing [ReI(3-imâ)(CO)3(phen
- â)]â, similar to the analogous 2,2â²-bipyridine complex. In contrast to the bpy analogue, the stability of the phen
- â-containing complexes is significantly affected by lowering the temperature. At 233Â K, a secondary reaction occurs in both [Re(3-imâ)(CO)3(phen
- â)]â and [Re(imCH3)(CO)3(phen
- â)]. The resulting products exhibit ν(CO) wavenumbers indistinguishable from those of the parent phen
- â complexes; however, their oxidation occurs at a considerably more positive electrode potential. It is proposed that these species are produced by a new CC bond formation between the C(2) site of 3-imâ or imCH3 and the C(2) site of the phen
- â ligand.
- â â imH intramolecular electron transfer coupled with NH bond cleavage. This process is followed by second phen-localized 1eâ reduction producing [ReI(3-imâ)(CO)3(phen
- â)]â, similar to the analogous 2,2â²-bipyridine complex. In contrast to the bpy analogue, the stability of the phen
- â-containing complexes is significantly affected by lowering the temperature. At 233Â K, a secondary reaction occurs in both [Re(3-imâ)(CO)3(phen
- â)]â and [Re(imCH3)(CO)3(phen
- â)]. The resulting products exhibit ν(CO) wavenumbers indistinguishable from those of the parent phen
- â complexes; however, their oxidation occurs at a considerably more positive electrode potential. It is proposed that these species are produced by a new CC bond formation between the C(2) site of 3-imâ or imCH3 and the C(2) site of the phen
- â ligand.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 110, 1 November 2013, Pages 702-708
Journal: Electrochimica Acta - Volume 110, 1 November 2013, Pages 702-708
نویسندگان
Qiang Zeng, Mahdi Messaoudani, AntonÃn Jr., FrantiÅ¡ek Hartl,