Therefore, the conclusion arrived at by Malone-i.e., that the UDMH hydrazone of salicylaldehyde is as basic as UDMH-is incorrect. Under the conditions employed by Malone, the UDMH hydrazone is hydrolyzed rapidly to UDMH and salicylaldehyde upon addition of perchloric acid, whereas,the azine is stable and therefore not titrated as a moderate base in glacial acetic acid.
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