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There are 2 main types,chlorophyll named a and b. They differ slightly in the composition of a sidechain (in ait is -CH3, in b it is CHO). Both However are very effective photoreceptors as they contain a network of alternating single and double bonds, and the orbitals can delocalise, stabilising the structure. Such delocalised polyenes have very strong absorption bands in the visible regions of the spectrum, allowing the plant to absorb the energy from sunlight.

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16y ago

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