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Dimethylchlorphosphan und Quecksilber reagieren bei erhöhten Temperaturen langsam miteinander unter Bildung orthorhombischer Kristalle der koordinationspolymeren Verbindung TMP · HgCl2 [TMP  (CH3)2PP(CH3)2]. Die Verbindung ist chemisch unerwartet stabil. Beim Erhitzen zersetzt sie sich wieder in Hg und sehr reines (CH3)2PCl. Die Einwirkung von Alkalihydroxid ergibt Dimethylphosphan.

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Electrical Properties / Electrochemistry / Liquids / Metal-Nonmetal Transition / Thermodynamics The electronic conductivity of liquid Na -NaI and Na -NaBr has been measured over a wide concentration range from dilute to conce.ntr~ted non':'1etaIlic solutions at different temperatures between 700 and 900°C. Two methods have been applied, the Wagner lar.lzatlOn techniqueat low metal activitiesand an ac-techniqueat high activitieswherethe concentration has been varied bycoulometric tltrat~on. A thermodyn~mlc defect model previously used for solids is developed and extended to liquid solutions. It quantitatively describes the concentration and temperature dependence of the thermodynamic properties as well as the charge carrier concentration in these nonmetallic systems. The electronic mobility has been determined and the transport mechanism approaching the nonmetal-metal transition is discussed.

Malonester (1) rcagiert mit Methyl-und Phenylisocyanat in Gegenwart von Triathylamin bei Raumtemperatur ZLL den Carbamoylmalonestern 2a, b, in der Hitze dagegen ZLI den bisher noch unbckannten Barbitursaure-5-carbonslureestern 3. Mit I-Naphthylisocyanat erfolgt die Cyclisicrung zu 3 bereits ohne WBrmezufuhr. Auch 2b bildet rnit Methylisocyanat/Tri-Ithylamin in dcr tiitze einen Barbitursaurecarbonsaureester. Dagegen entstehen aus 2a unter Bhnlichen Bedingungen 5-Carbamoylbarbitursauren 4. Zu einer solchen gelangt man auch bei der Reaktion von Malonanilsiureester (6) und Tsocyanat in Trigthylamin. The Base Catalysed Reaction of Active Methylene Compounds with Isocyanates, 1 Synthesis of Barbituric Acid-5-carboxylates and -5-carboxamidesMalonic ester (1) reacts with methyl and phenyl isocyanate in the presence of triethylamine at room temperature to give the carbamoyimalonic csters 2a, b, whereas, under reflux, the hitherto unknown barbituric acid-5-carboxylic esters 3 are formed. With I-naphthyl isocyanate cyclination to 3 occurs without heating. Similarly, by refluxing 2 b with methyl isocyanate in tricthylamine, a barbituric acid-carboxylic ester is obtained. In contrast, the reaction of 2 a with, isocyanates under similar conditions results in the formation of 5-carbamoylbarbituric acids 4. A compound of this series is also obtained by reacting malonanilic ester (6) with isocyanate in triethylamine.