Summary
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1.
The optical activity of the chlorophylls is determined only by the asymmetric carbon atoms in positions 7 and 8 and the two asymmetric atoms of the phytyl residue. Because of keto-enol equilibrium, the asymmetric C10 atom in the carbocyclic ring posses no optical activity.
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2.
The optical activity of solutions of the chlorophylls has an anomalous rotatory dispersion and increases with an increase in the concentration of the solutions.
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Kutyurin, V.M., Grigorovich, V.I. Optical activity of chlorophyll and the keto-enol tautomerism of the carbocyclic ring. Chem Nat Compd 3, 44–46 (1967). https://doi.org/10.1007/BF01171723
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DOI: https://doi.org/10.1007/BF01171723