کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5373356 1504212 2015 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Towards an understanding of the CO2-philicity in glycine: Deepening into the CO2:Aminoacid interactions
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Towards an understanding of the CO2-philicity in glycine: Deepening into the CO2:Aminoacid interactions
چکیده انگلیسی


- CO2:glycine heterodimers has been studied by means of MP2/aug-cc-pVDZ level.
- Heterodimers exhibit tetrel and H-bonds.
- Binding energies are between −3.00 and −5.29 kcal/mol.
- Electrostatic is the prime contribution to the energy stability followed by dispersion.

The potential energy surface (PES) for the CO2:glycine complexes were thoroughly examined by means of the MP2/aug-cc-pVDZ computational level. Heterodimers exhibit non-covalent interactions holding monomers together primarily by Xlp···CO2 (X = O, N) tetrel bonds and, in some binary complexes, by additional OCOlp···HY (Y = O, N) H-bonds. Non-classical CH···O H-bonds are also present in some cases as secondary interactions. Binding energies are between −3.00 and up to −5.29 kcal/mol, being for the most stable complexes comparable with the one obtained for the paradigmatic water dimer. Partitioning of the interaction energy points to electrostatic as the prime contribution to the stability with an important dose of dispersion. Electron density shifts reveal a gain of electron density associated to the tetrel bond acceptor, whereas the donor moiety experiences a loss.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Physics - Volumes 453–454, 12 May–1 June 2015, Pages 1-6
نویسندگان
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