Spontaneous Resolution to Absolute Chiral Induction: Pseudo-Kagomé Type Homochiral Zn(II)/Co(II) Coordination Polymers with Achiral Precursors

It
is observed that conglomerate crystallization of achiral precursors
yielding racemate metal organic frameworks/coordination polymers (MOFs/CPs)
can be driven to absolute homochiral crystallization of the desired
enantiomorph by utilizing a suitable chiral induction agent. In a
series of crystallization experiments isostructural Zn and Co homochiral
CPs (1P, 1M and 2P, 2M) are prepared using the achiral precursors. In the presence of enantiopure
camphoric acid, the crystallization process prefers absolute chiral
induction over conglomerate formation which is established by single
crystal X-ray diffraction and CD spectroscopy.