C 2 h 4 cl 2 July 8, 2019 16 32 64 128 C 2 h 4 cl 2 reaction C 2 h 4 c 2 h 5 cl C 2 h 4 ra c 2 h 5 cl C 2 h 4 suy ra c 2 h 5 cl C 2 h 4 cl2 ra c 2 h 3 cl
