Both L- or D-norvaline hydroxamic acids undergo one-step reactions with acetate, chloride, and CuII ions to form self-assembled metallahelicates that contain 20 chiral carbon and four chiral metal centers. Enantiopure complexes of over three nanometers in length, and composed of either P- or M-type double-stranded helical oligomers (see scheme), have been isolated.
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Johnson et al. (2003) studied this question.
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