Reactions of the 2-phosphaethynolate anion (PCO(-), 1) with ammonium salts quantitatively yielded phosphinecarboxamide (PH2C(O)NH2, 2). The molecular structure and chemical properties of 2 were studied by single-crystal X-ray diffraction and multielement NMR spectroscopy. This phosphorus-containing analogue of urea is a rare example of an air-stable primary phosphine.
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Jupp et al. (2013) studied this question.
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