2-Trichloromethylbenzimidazole (TCMB) in Analytical Chemistry
Автор:Leszek Konopski Год: 2014 Издание:LAP Lambert Academic Publishing Страниц: 52 ISBN: 9783847341642 The review on applications of 2-trichloromethylbenzimidazole (TCMB) in analytical chemistry is presented. It was unexpectedly found, the uncolored TCMB reacted vigorously with pyridine at RT affording high-colored products. In reactions with some other nitrogen containing heteroaromatics (including pesticides) such as azines, azoles or benzazoles, formation of similar products occurred as well. The reaction was regioselective, since the both ?-positions adjacent versus the nitrogen atom(s) must not be substituted, and sensitive. However, the attempts to develop dosimeters for nicotine failed. In a pre-chromatographic reaction of aromatic o-diamine with methyl trichloroacetimidate, TCMB derivatives were formed in situ. Followed by TLC and visualization in pyridine vapors, it was applied for detection of o-phenylenediamines. The amaranth reaction product of TCMB and pyridine (LI Complex) was isolated and identified. Two different reaction mechanisms for azines an azoles were proposed....
