The simplest series has the chemical formula XH3 (less commonly H3X), with X representing any of the pnictogens. I use WIKI 2 every day and almost forgot how the original Wikipedia looks like. Hydrazine has physical properties that are remarkably similar to those of water: its melting and boiling points are 2.0 °C and 113.5 °C, the density of the solid at −5 °C is 1.146 g/cm3, while that of the liquid at 25 °C is 1.00 g/cm3. Some properties of the pnictogen trihydrides follow:[1]. Ammonia is produced industrially on the largest scale among all compounds. Pnictogen hydrides or hydrogen pnictides are binary compounds of hydrogen with pnictogen atoms (elements of group 15: nitrogen, phosphorus, arsenic, antimony, and bismuth) covalently bonded to hydrogen.. Pnictogen trihydrides. Ammonia, phosphine, and arsine, three simple pnictogen hydrides. Other effects of hydrogen bonding are a high dielectric constant as well as low values of density, viscosity, and electrical conductivity. Like the simple hydrogen halides and chalcogenides, the pnictogen hydrides are water-soluble. Arsine decomposes to arsenic and hydrogen at 250–300 °C, stibine to antimony and hydrogen at room temperature, and bismuthine to bismuth and hydrogen above −45 °C. A few lower hydrides are known, such as As2H4, but they are even more unstable and their properties are unknown.[1]. Would you like Wikipedia to always look as professional and up-to-date? [3] The azanes are a series which include ammonia, hydrazine and triazane. We have created a browser extension. Ammonia has an infamous, intense odour resembling urine and/or fish, commonly the result of the decomposition of urea. Arsine and stibine are very easily oxidised to arsenic or antimony trioxide and water; a similar reaction happens with sulfur or selenium. Reaction with metals at elevated temperatures leads to arsenides and antimonides. The sim­plest se­ries has the chem­i­cal for­mula XH3 (less com­monly H3X), with X rep­re­sent­ing any of the pnic­to­gens. Phosphine, a toxic, colourless gas, is the most stable phosphorus hydride and is the first of the homologous straight-chain polyphosphane series PnHn+2 (n = 1–9) that become increasingly thermally unstable as n increases. Wikipedia. Arsine decomposes to arsenic and hydrogen at 250–300 °C, stibine to antimony and hydrogen at room temperature, and bismuthine to bismuth and hydrogen above −45 °C. Other cyclic and condensed polyphosphane series are known, from PnHn to PnHn−18, amounting to 85 known phosphanes in 1997. It will enhance any encyclopedic page you visit with the magic of the WIKI 2 technology. Share. Topics similar to or like Pnictogen hydride. The pnictogen hydrides become denser down the group and the M–H bond lengths increase, while the H–M–H bond angle decreases slightly. No appreciable hydrogen bonding is found in phosphine, arsine, stibine or bismuthine, and there is no appreciable tendency to dissociate like ammonia to MH+4 and MH−2 (M = P, As, Sb, Bi). It is pnictogen hydride - Buy this stock vector and explore similar vectors at Adobe Stock Although common in nature and in wide use, ammonia is both caustic and hazardous in its concentrated form. They take on the pyramidal structure (as opposed to the trigonal planar arrangement of the group 13 hydrides), and therefore are polar. That's it. Ammonia has an infamous, intense odour resembling urine and/or fish, commonly the result of the decomposition of urea. [3] The azanes are a series which include ammonia, hydrazine and triazane. The pnictogen hydrides become denser down the group and the M–H bond lengths increase, while the H–M–H bond angle decreases slightly.

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