کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1347892 | 980329 | 2005 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Enantiomeric recognition of α-(1-naphthyl)ethylammonium perchlorate by enantiomerically pure dimethylphenazino-18-crown-6 ligand in solid and gas phases
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی معدنی
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
X-Ray crystallographic studies of enantiomerically pure dimethylphenazino-18-crown-6 ligand (R,R)-1 and its complexes with the enantiomers of α-(1-naphthyl)ethylammonium perchlorate NapEt were carried out. These studies clearly show that the heterochiral complex (R,R)-1–(S)-NapEt is more stable than the homochiral one (R,R)-1–(R)-NapEt. It was pointed out that besides the hydrogen bonding, mainly the π–π interaction between the aromatic systems of the host and guest, and the difference in steric repulsions were responsible for enantioselectivity. Molecular mechanical calculations using the LMOD/MINTA method also predicted the heterochiral complex to be more stable than the homochiral one in the gas phase.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Tetrahedron: Asymmetry - Volume 10, Issue 10, 21 May 1999, Pages 1995–2005
Journal: Tetrahedron: Asymmetry - Volume 10, Issue 10, 21 May 1999, Pages 1995–2005
نویسندگان
Tı́mea Gérczei, Zsolt Böcskei, György M Keserű, Erika Samu, Péter Huszthy,