Triuret
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| Names | |
|---|---|
| Other names Carbonyldiurea 1,3-Dicarbamylurea Dicarbamylurea Diimidotricarbonic diamide 2,4-diimidotricarbonic diamide Tricarbonodiimidic diamide | |
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ChemSpider |
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ECHA InfoCard | 100.008.317 |
EC Number | 209-147-7 |
MeSH | C017781 |
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| Properties | |
Chemical formula | C3H6N4O3 |
Molar mass | 7002146106000000000♠146.106 g·mol−1 |
Density | 1.547 g/cm3 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
Infobox references | |
Triuret is an organic compound with the formula (H2NC(O)NH)2CO. It is a product from the pyrolysis of urea. Triuret is a colorless, crystalline, hygroscopic solid, slightly soluble in cold water or ether, and more soluble in hot water. It is a planar molecule. The central carbonyl is hydrogen-bonded to both terminal amino groups.[1]
Synthesis
The compound is typically prepared by heating thin layers of urea, the thin layers facilitating escape of ammonia:
- 3 (H2N)2CO → [H2NC(O)NH]2CO + 2 NH3
It can also prepared by treatment of urea with phosgene:[2]
- 2 (H2N)2CO + COCl2 → [H2NC(O)NH]2CO + 2 HCl
A similar synthesis employs urea and dimethyl carbonate with potassium methoxide as a catalyst:[3]
- 2 (H2N)2CO + CO(OCH3)2 → [H2NC(O)NH]2CO + 2 MeOH
The original synthesis entailed oxidation of uric acid with hydrogen peroxide.[4]
Triuret is a complicating by-product in the industrial synthesis of melamine from urea.
Related compounds
- Urea
- Biuret
- Cyanuric acid
References
^ D. Carlström and H. Ringertz "The molecular and crystal structure of triuret" Acta Crystallogr. (1965. vol. 18, 307-313. doi:10.1107/S0365110X65000737
^ C. Nitschke, G. Scherr (2012), "Urea Derivatives", Ullmann's Encyclopedia of Industrial Chemistry, Weinheim: Wiley-VCH, doi:10.1002/14356007.o27_o04CS1 maint: Uses authors parameter (link).mw-parser-output cite.citation{font-style:inherit}.mw-parser-output .citation q{quotes:"""""""'""'"}.mw-parser-output .citation .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-limited a,.mw-parser-output .citation .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Wikisource-logo.svg/12px-Wikisource-logo.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-maint{display:none;color:#33aa33;margin-left:0.3em}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}
^ Chen, Jianchao; Zhao, Peihua; Liu, Yaqing; Liu, Hua; Zhu, Futian (2012). "Clean and facile synthesis of triuret from urea and dimethyl carbonate (DMC) under mild conditions". Korean Journal of Chemical Engineering. 29 (3): 288–290. doi:10.1007/s11814-011-0172-8.
^ Alfred Schittenhelm, Karl Wiener "Carbonyldiharnstoff als Oxydationsprodukt der Harnsäure" Zeitschrift für Physiologische Chemie 1909, volume 62, 100 ff..
