(CH3COO)2C2H4; C/ CH2(COO)2C2H4

Bài 12. a/ B:C

2

H

4

(OH)

2

; b/ X:CH

2

(COOH)

2

; Y: (CH

3

COO)

2

C

2

H

4

; c/ CH

2

(COO)

2

C

2

H

4