Differentiate between chlorophyll a and chlorophyll b How ar

Differentiate between chlorophyll a and chlorophyll b. How are the two molecules structurally different and how do their absorption differ?

Solution

chlorophill II is a green plant pigment which present in al plants. chemicl structural diffrence between chlorophill II a and chlorophill IIb is presence of methyl group in chlorophill a( C₅₅ H₇₂Mg N₄ 0₅₎ but aldehyde in chlorophill b(  C₅₅ H₇₀Mg N₄ 0₆). chl IIa is a primary pigment where as IIb is a acessory pigment. chlorophill IIa absorption is due to presence of two string bands which are located in red-blue spectrum and emittes green in respective wave length 440 and 675nm where as in chlorophill IIb has above two bands being close tight together at 453 and 643nm ..