Hexakis(prop‐2‐enamide)copper(II) bis(perchlorate) and hexakis(prop‐2‐enamide)manganese(II) bis(perchlorate)

The structures of Cu(AA)₆](ClO₄)₂, (I), and Mn(AA)₆](ClO₄)₂, (II) (AA is acrylamide, also known as prop‐2‐enamide; C₃H₅NO), display both intra‐ and intermolecular N—H...O hydrogen bonding. A three‐dimensional network is propagated via the perchlorate counter‐ions. There are two crystallographically independent molecules in the copper complex, with the most significant difference between them being the conformation of one symmetry‐related pair of AA ligands which are in the unusual syn conformation. The copper complex exhibits syn/anti disorder of the =CH₂ group in one pair of symmetry‐related AA ligands. The Cu^II and Mn^II centres are both situated on centres of inversion. The copper complex cation has octahedral coordination geometry with typical Jahn–Teller distortions.