Acetylides calcium acetylide

Disilver acetylide Silver acetylide-silver nitrate Digold(l) acetylide Barium acetylide Calcium acetylide (carbide)... 

This reaction shows that the methide ion is a very strong Bmnsted base. The species C22 is the acetylide ion, and the carbides that contain it are called acetylides. The acetylide ion is also a strong Bronsted base, and acctylides react with water to produce ethyne (acetylene) and the corresponding hydroxide. Calcium carbide, CaC2, is the most common saline carbide. 

Thus, all copper salts give an explosive reaction with calcium carbide. This is due to the formation of explosive copper acetylide, which is formed from cupric or cuprous cation and the acetylene formed. 

A calcium carbide/stannous mixture combusted. Could it be the exothermic decomposition of a tin acetylide ... 

Silver nitrate (or other soluble salt) reacts with acetylene in presence of ammonia to form silver acetylide, a sensitive and powerful detonator when dry. In the absence of ammonia, or when calcium acetylide is added to silver nitrate solution, explosive double salts of silver acetylide and silver nitrate are produced. Mercury(I) acetylide precipitates silver acetylide from the aqueous nitrate. 

Addition of calcium acetylide to silver nitrate solution precipitates silver acetylide, a highly sensitive explosive. Copper salt solutions would behave similarly. 

Calcium acetylide, or Potassium cyanide, or Potassium thiocyanate, or Sodium iodide Kirk-Othmer, 1966, Vol. 9, 602... 

Metal acetylides or carbides Calcium carbide 3.97/46 See Caesium acetylide Mineral acids Rubidium acetylide Acids Uranium dicarbide Hydrogen chloride... 

Monorubidium acetylide ignites in molten sulfur barium carbide ignites in sulfur vapour at 150°C and incandesces while calcium, strontium, barium and uranium carbides need a temperature around 500°C to ignite. 

Metal acetylides incandesce on heating in selenium vapour barium acetylide at 150°C, calcium acetylide and strontium acetylide at 500°C and thorium carbide at an unstated temperature. 

Calcium acetylide is used in the manufacture of calcium cyanamide, CaCN2, by the reaction of CaC2 with N2 at high temperature. 

The acetylide ion, C/, is isoelectronic with N2, CO, and CN. The reaction producing acetylene from calcium carbide can be shown as... 

In addition to the types of compounds discussed so far, the group IVA elements also form several other interesting compounds. Silicon has enough nonmetallic character that it reacts with many metals to form binary silicides. Some of these compounds can be considered as alloys of silicon and the metal that result in formulas such as Mo3Si and TiSi2. The presence of Si22 ions is indicated by a Si-Si distance that is virtually identical to that found in the element, which has the diamond structure. Calcium carbide contains the C22-, so it is an acetylide that is analogous to the silicon compounds. 

MOLECULAR SIEVE INCIDENTS ethylene ORGANIC POWDER HANDLING PEROXIDES IN SOLVENTS SOLVATED OXOSALT INCIDENTS Cadmium propionate, 2418 Calcium acetylide Methanol Diazomethane Calcium sulfate, 0406 3,5 -Dinitrotoluamide... 

Benzyl bromide, Molecular sieve, 2735 Benzyl chloride, Catalytic impurities, 2738 1,2-Bis(chloromethyl)benzene, 2946 Bis(2-cyanoethyl)amine, 2397 Bis(trimethylsilyl) peroxomonosulfate, 2602 Borane -tetrahydrofuran, 0138 Butylmagnesium chloride, 1641 Calcium acetylide, Methanol, 0585 Calcium chloride, 3923 Cerium, Water, 3961... 

Catalytic forms of copper, mercury and silver acetylides, supported on alumina, carbon or silica and used for polymerisation of alkanes, are relatively stable [3], In contact with acetylene, silver and mercury salts will also give explosive acetylides, the mercury derivatives being complex [4], Many of the metal acetylides react violently with oxidants. Impact sensitivities of the dry copper derivatives of acetylene, buten-3-yne and l,3-hexadien-5-yne were determined as 2.4, 2.4 and 4.0 kg m, respectively. The copper derivative of a polyacetylene mixture generated by low-temperature polymerisation of acetylene detonated under 1.2 kg m impact. Sensitivities were much lower for the moist compounds [5], Explosive copper and silver derivatives give non-explosive complexes with trimethyl-, tributyl- or triphenyl-phosphine [6], Formation of silver acetylide on silver-containing solders needs higher acetylene and ammonia concentrations than for formation of copper acetylide. Acetylides are always formed on brass and copper or on silver-containing solders in an atmosphere of acetylene derived from calcium carbide (and which contains traces of phosphine). Silver acetylide is a more efficient explosion initiator than copper acetylide [7],... 

Calcium acetylide, 0585 Copper(II) acetylide, 0615 Copper(I) benzene-l,4-bis(ethynide), 3236 Copper l,3,5-octatrien-7-ynide, 2933 DicopperQ acetylide, 0619 DicopperQ 1,5-hexadiynide, 2165 Dimethyl(phenylethynyl)thallium, 3298 Dimethyl-1-propynylthallium, 1938 GoldQ acetylide, 0573 Lithium acetylide, 0992 Lithium bromoacetylide, 0580 Lithium chloroacetylide, 0599 Lithium 1-heptynide, 2834... 

Aluminium, 0048 Ammonium phosphinate, 4554 Barium phosphinate, 0210 f Benzaldehyde, 2731 1,4-Benzenediol, 2333 Bis(hydrazine)tin(II) chloride, 4070 Calcium acetylide, 0585 Calcium phosphinate, 3931 Chromium(II) chloride, 4052 Chromium(II) oxide, 4241 Chromium(II) sulfate, 4244 Copper(I) bromide, 0265 Diacetatotetraaquocobalt, 1780 Diisobutylaluminium hydride, 3082 f 1,2-Dimethylhydrazine, 0955... 

Calcium acetylide, Iron(III) chloride, Iron(III) oxide, 0585... 

Calcium acetylide, 11 182-183 Calcium aluminum hydride, preparation and properties of, 8 327-329 Calcium borates, 25 218-219 stability ranges, 25 209-210 structures, 25 190-195, 197-199 in water, 25 218... 

Why can calcium carbide be called an acetylide, while beryllium and aluminium carbides cannot be given this name ... 

Much research was necessary in order to establish the chemical composition of cuprous acetylide. Blochmann [103] and Scheiber and Reckleben [104] showed that the freshly precipitated and dried product has the approximate composition Cu2C2 H20. According to Keiser [105] drying this salt over sulphuric acid or calcium chloride (Scheiber and Reckleben [104]) gives an anhydrous product. 

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