Stable Radicals Have Been Used As Biosensors To Monitor Cellular Oxygen Levels One Of The First Stable Radicals To Be R 1 (23.64 KiB) Viewed 120 times
Stable Radicals Have Been Used As Biosensors To Monitor Cellular Oxygen Levels One Of The First Stable Radicals To Be R 2 (25.13 KiB) Viewed 120 times
Stable Radicals Have Been Used As Biosensors To Monitor Cellular Oxygen Levels One Of The First Stable Radicals To Be R 3 (31.05 KiB) Viewed 120 times
Stable radicals have been used as biosensors to monitor cellular oxygen levels. One of the first stable radicals to be reported was the triphenylmethyl radical, shown below. More recently, similar radicals have been prepared in which the hydrogen atoms of the phenyl rings have been replaced with other atoms or groups to make sensors that are more water-soluble. (Bioorg. Med. Chem Lett. 2007, 17. 6801-6805), Drawall resonance structures of the triphenylmethyl radical, and explain why it is unusually stable. The triphenylmethyl radical is highly delocalized by resonance. In the resonance hybrid, how many different positions have radical character?
Which of the following is NOT a possible resonance structure of the triphenylmethyl radical?
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