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Explosive terrorism characteristics of explosives and explosions
Published in Robert A. Burke, Counter-Terrorism for Emergency Responders, 2017
Silver acetylide, (silver carbide) (C2Ag2), is also an inorganic explosive, metal acetylide that is highly sensitive and cannot be used in detonators. Silver acetylide is a primary explosive. It is a white powder that is sensitive to light (one of the exceptions to the inorganic/organic rules). Generally, a chemical explosive must be confined for an explosion to take place. However, silver acetylide maintains a high-energy density and will detonate without confinement. Dry silver acetylide poses an explosion hazard when exposed to heat, shock, or friction. When dry, it should not be stored indoors. Since it is light sensitive, it should be stored in a dark room. It should also be stored in an amber bottle.
Applied Chemistry and Physics
Published in Robert A. Burke, Applied Chemistry and Physics, 2020
Silver acetylide (silver carbide), C2Ag2, is also an inorganic explosive that is highly sensitive and cannot be used in detonators. Silver acetylide is a primary explosive. It is a white powder that is sensitive to light. Generally, a chemical explosive must be confined for an explosion to take place. However, silver acetylide maintains a high-energy density and will detonate without confinement. Dry silver acetylide poses an explosion hazard when exposed to heat, shock or friction. When dry, it should not be stored indoors. Because it is light sensitive, it should be stored in a dark room. It should also be stored in an amber bottle.
Silver iodide catalyzed the three-component reaction between terminal alkynes, carbon disulfide, and aziridines
Published in Journal of Sulfur Chemistry, 2019
To develop the designed catalytic multicomponent reaction, phenyl acetylene (1a), carbon disulfide (2), and aziridine 3a were chosen as reaction partners to optimize the reaction conditions (Table 1). Initial efforts using CuOTf and (i-Pr)2EtN to implement the proposed transformation were complicated by formation of compound 5 (entry 1), which might be arising from the competing attack of the copper-acetylide to 4-methyl-N-(3-phenylpropylidene)benzenesulfonamide derived from Meinwald rearrangement [31], of 2-benzyl-1-tosylaziridine (3a). Control experiments clearly revealed that common copper (I) and (II) salts were not efficient for the successful synthesis of the desired product 4 (entries 2–7). The yields of the desired product 4 and the by-product 5 could be modulated by using N-heterocyclic carbene copper(I) catalyst (IPr)CuCl (IPr = 1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene) (entry 8). The study also showed that Fe(OTf)3 and In(OTf)3 were not efficient in carrying out this transformation (Table 1, entries 9 and 10). Pd(OAc)2 and AuCl3 were also examined but proved unsuitable catalysts (entries 11 and 12). Various silver salts were also examined to further optimize the reaction outcome (entries 14–18). Upon examination of silver salts, AgI has been found to be optimal (entry 14). An outcome we attributed to higher affinity of silver-acetylide to sulfur atom of CS2 in comparison of oxygen in oxirane molecule. Particularly notable was that the use of silver salts as the catalyst of choice completely inhibited the formation of undesired product 5. These results demonstrated that the insertion of carbon disulfide into silver-acetylide species proceeds significantly faster than that of aziridine to the silver-acetylide bond.
Dinuclear silver-bis(N-heterocyclic carbene) complexes: Synthesis, catalytic activity in propargylamine formation and computational studies
Published in Journal of Coordination Chemistry, 2021
A mechanism grounded on the literature is shown in Figure 2. Initially, formation of a silver-acetylide complex occurs. Then, the silver complex reacts with an iminium cation forming a propargylamine and the catalyst regenerates [43, 59].