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A Systematic Study of the Solid-State Pathway from Melamine via Melaminate to Carbodiimide under Evolution of Hydrogen.
- Source :
-
Inorganic chemistry [Inorg Chem] 2024 Sep 02; Vol. 63 (35), pp. 16565-16572. Date of Electronic Publication: 2024 Aug 23. - Publication Year :
- 2024
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Abstract
- Thermal analysis techniques, such as differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA), can provide valuable insights into thermal properties, intermediate phases, and phase transitions; sometimes even a whole series of compounds appears in a given system. The solid-state reaction pathway from melamine to carbodiimide, monitored by DSC, involves a sequence of chemical reactions and intermediate phases departing from the reaction of potassium hydride and melamine. The fully analyzed reaction cascade begins with the formation of potassium melaminate, K(C <subscript>3</subscript> N <subscript>6</subscript> H <subscript>5</subscript> ), and progresses through several intermediate phases, each with distinct structures and properties, before ultimately yielding β-K <subscript>2</subscript> (CN <subscript>2</subscript> ). All crystalline compounds appearing in this reaction sequence are identified using X-ray diffraction analyses. With a 6:1 ratio of potassium hydride and melamine, equal numbers of protic and hydridic hydrogen atoms in the starting materials favor the release of H <subscript>2</subscript> until the formation of the final product K <subscript>2</subscript> (CN <subscript>2</subscript> ), which appears with two modifications.
Details
- Language :
- English
- ISSN :
- 1520-510X
- Volume :
- 63
- Issue :
- 35
- Database :
- MEDLINE
- Journal :
- Inorganic chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 39176470
- Full Text :
- https://doi.org/10.1021/acs.inorgchem.4c02996