کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1195022 | 1492383 | 2006 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Cationic germanium fluorides
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The reaction between singlet ground state GeF+ (1Σ+) and H2O, with formation of Ge-OH+ and HF, was investigated by ion trap mass spectrometry (ITMS) and ab initio calculations at the MP2 and CCSD(T) level of theory. The process involves the initial formation of the addition product FGe+-OH2 (1), its interconversion into HOGe+-FH (2), and the eventual barrier-free dissociation into Ge-OH+ and HF. The activation barrier of the 1 â 2 isomerization is comparable with the exothermicity (exoergicity) of the formation of 1, and this explains the relatively low efficiency of the process, experimentally evaluated as 0.14 from the ratio of the absolute rate constant, 3.2 Ã 10â10 cm3 moleculeâ1 sâ1, and the collisional rate constant. The mechanism of the reaction between GeF+ and H2O is strictly analogue to that of the reaction between SiF+ and H2O, investigated so far by selected-ion flow tube (SIFT) mass spectrometry and ab initio calculations. From a general point of view, the conceivable occurrence of additional similarities between the still essentially unexplored reactivity of GeFn+ (n = 1-3) and the rich and variegated chemistry of SiFn+ suggests novel attractive opportunities in the gas-phase positive ion chemistry of germanium.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Mass Spectrometry - Volume 257, Issues 1â3, 1 November 2006, Pages 50-59
Journal: International Journal of Mass Spectrometry - Volume 257, Issues 1â3, 1 November 2006, Pages 50-59
نویسندگان
Paola Antoniotti, Roberto Rabezzana, Stefano Borocci, Nicoletta Bronzolino, Maria Giordani, Felice Grandinetti,