A) Scrieti ecuatia de formare a 1,2,3- tristearil- glicerol (tristearina) obtinuta prin esterificarea a 3 moli de acid stearic cu glicerina
B) Scrieti ecuatiile de formare a urmatoarelor trigliceride mixte: 1,3-dipalmitil -2- stearil - glicerol (dipalmitostearina) 1,2 - dioleil-3 -palmitil- glicerol (dioleopalmitina)
C) Scrieti ecuatia reactiei de hidroliaza in mediu acid pentru : 1,2- dipalmitil-3 -stearil -glicerol
D) Un mol de glicerida (triglicerida) ,G , formeaza in hidroliza enzimatica (in mediu acid) 3 moli de acid stearic si un mol de glicerina. Scrieti formula de structura a glicerinei G.
Răspunsuri la întrebare
A)
H2C-OH
I
HC-OH + 3 HOOC-(CH2016-CH3
I
H2C-OH
H2C-OCO-(CH2)16-CH3
I
HC-OCO-(CH2)16-CH3 + 3H2O
I
H2C-OCO-(CH2)16-CH3
tristearina
B)
H2C-OH
I
HC-OH + 2 HOOC-(CH2)14-CH3 + HOOC-(CH2)16-CH3
I
H2C-OH
H2C-OCO-(CH2)14-CH3
I
HC-OCO-(CH2)16-CH3 + 3H2O
I
H2C-OCO-(CH2)14-CH3
dipalmitostearina
H2C-OH
I
HC-OH + 2 HOOC-(CH2)7-CH=CH-(CH2)7-CH3 + HOOC-(CH2)16-CH3
I
H2C-OH
H2C-OCO-(CH2)7-CH=CH-(CH2)7-CH3
I
HC-OCO-(CH2)7-CH=CH-(CH2)7-CH3 + 3H2O
I
H2C-OCO-(CH2)14-CH3
dioleopalmitina
C)
H2C-OCO-(CH2)14-CH3
I
HC-OCO-(CH2)14-CH3 + 3H2O --H+-->
I
H2C-OCO-(CH2)16-CH3
H2C-OH
I
HC-OH + 2 HOOC-(CH2)14-CH3 + HOOC-(CH2)16-CH3
I
H2C-OH
D)
H2C-OCO-(CH2)16-CH3
I
HC-OCO-(CH2)16-CH3 + 3H2O --H+-->
I
H2C-OCO-(CH2)16-CH3
H2C-OH
I
HC-OH + 3 HOOC-(CH2016-CH3
I
H2C-OH