To and fro: Chiral metal–organic frameworks (CMOFs) derived from redox-active ruthenium/salen building blocks exhibited reversible single-crystal to single-crystal reduction and reoxidation. The catalytically inactive RuIII CMOFs (green; see picture) were reduced to RuII CMOFs (red) that were highly active for the asymmetric cyclopropanation of alkenes with very high diastereo- and enantioselectivities.
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Falkowski et al. (2011) studied this question.
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