Model Studies on the Formation and Reactions of Solid Glycine Complexes at the Coasts of a Primordial Salty Ocean
| العنوان: | Model Studies on the Formation and Reactions of Solid Glycine Complexes at the Coasts of a Primordial Salty Ocean |
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| المؤلفون: | Henry Strasdeit, Stefan Fox, Petra Guni, Kirill Yusenko |
| المصدر: | Zeitschrift für anorganische und allgemeine Chemie. 634:2347-2354 |
| بيانات النشر: | Wiley, 2008. |
| سنة النشر: | 2008 |
| مصطلحات موضوعية: | chemistry.chemical_classification, Thermogravimetric analysis, Chemistry, Magnesium, Inorganic chemistry, Thermal decomposition, chemistry.chemical_element, Salt (chemistry), Hydrochloric acid, Coordination complex, Inorganic Chemistry, Efflorescence, chemistry.chemical_compound, Differential thermal analysis |
| الوصف: | Laboratory experiments pertinent to the prebiotic hot-volcanic-coast scenario are described. When artificial primordial seawater which contained NaCl, KCl, MgCl2, CaCl2, and a small amount of glycine (Hgly) was evaporated to dryness, it was found that in the remaining solid salt mixture the amino acid was exclusively present as CaCl2(Hgly)·H2O (1). The coordination compound 1 was also obtained by controlled efflorescence of the corresponding trihydrate CaCl2(Hgly)·3H2O (2). A characteristic structural feature of crystalline 2 is [CaCl(Hgly)(H2O)3]+ units that are interconnected to form one-dimensional coordination polymers. On thermolysis at 350 °C in a nitrogen atmosphere, compound 1 yielded, inter alia, 15 different methylated and ethylated pyrroles. In contrast, the artificial sea salt–glycine mixtures, despite containing 1, produced no detectable amounts of organics under the same conditions. Hydrochloric acid from thermal hydrolysis of the sea salt component MgCl2·6H2O may be responsible for this different behavior. 1, 2, and the related compounds CaCl2(Hgly)2·4H2O (3), and MgCl2(Hgly)2·2H2O (4) have been prepared in analytically pure form on a multi-gram scale. Methods used in this study were single-crystal and powder X-ray diffraction, infrared and Raman spectroscopy, thermogravimetric and differential thermal analysis, and gas chromatography–mass spectrometry. |
| تدمد: | 1521-3749 0044-2313 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::967b109e478365f34ac295289d150ee3 https://doi.org/10.1002/zaac.200800285 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........967b109e478365f34ac295289d150ee3 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15213749 00442313 |
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