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Figure 4 | Nanoscale Research Letters

Figure 4

From: Propargylic substitution reactions with various nucleophilic compounds using efficient and recyclable mesoporous silica spheres embedded with FeCo/graphitic shell nanocrystals

Figure 4

Plausible mechanism for the PMA@FeCo/GC@MSS-catalyzed propargylic substitution reactions. (a) Protonation of hydroxyl group of propargylic alcohol. (b) Generation of propargylic carbenium ion by dehydration. (c) Donation of electron from electron-rich arene (d) removal of proton from the previous intermediate.

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