Is the unexpected behaviour of the resolved K 3[Cr III(C 2O 4) 3] in aqueous solution responsible for the formation of pure chiral solid phase of a two-dimensional (2D) [Mn IICr III(C 2O 4) 3 NEt( n-Pr)( n-Bu)( n-C 5H 11)] network?

Racemic and resolved [Cr III(C 2O 4) 3]K 3 dissolved in water were investigated by IR spectroscopy. Compared to the racemic compound, the spectrum of the resolved one exhibits additional peaks, which have a complex temporal evolution. These peaks are attributed to water molecules coordinated to the metal ion and tentatively related to the formation of a pure chiral solid phase of two-dimensional (2D) oxalate-based Mn–Cr networks starting from partially resolved Cr III(C 2O 4) 3] 3−.