Ammonical silver nitrate

Formyl-oxadiazoles present all the properties of aldehydes they reduce ammonical silver nitrate, form Schiff bases, oximes, hydrazones, semicarbazones and give dichloromethyl derivatives when treated with PClg. 

A) Ammonical silver nitrate method, in which the excess silver is detd volumetricaily by... 

When the gas mixture is passed through ammonical silver nitrate solution, acetylene reacts but ethane doesn t. 

Halogen-derivatives Ammonical silver nitrate (Dedondcr s/Tollens or2 ffaroni s reagent) (31)... 

By lioatiiiii tuiiijstyl chloride, WO CL. with dry ammonia, a black coinpoimd of comjio. ition V,0,X,Il2 is obtained. This is insoluble in water, diiute alkalies, or hydrochloric acid. It is decomposed by concentrated nitric acid, and yields ammon.ia with potassium hydroxide. It reduces silver nitrate solution to metallic silver. By the action of liquid ammonia on tunastyl chloride, a brown compound, WO. SXHg (see ]). 213 j. is obtained.-... 

Figure 2.3 shows Werner s early proposals for the bonding in the cobalt ammonates. He said that the cobalt must simultaneously satisfy both its primary and secondary valences. The solid lines show the groups that satisfy the primary valence, and the dashed lines, always directed toward the same fixed positions in space, show how the secondary valence was satisfied. In compound (1), all three chlorides satisfy only the primary valence, and the six ammonias satisfy only the secondary. In compound (2), one chloride must do double duty and help satisfy both valences. The chloride that satisfies the secondary valence (and is directly bound to the Co ion) was concluded to be unavailable for precipitation by silver nitrate. Compound (3) has two chlorides doing double duty and only one available for precipitation. Compound (4), according to Werner, should be a neutral compound with no ionizable chlorides. This was exactly what Jorgensen had foimd with the iridium compound. 

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