Tetrakis(methylamine-N)(oxalato-O1,O2)cobalt(III) perchlorate and tetrakis(ethylamine-N)(oxalato-O1,O2)cobalt(III) perchlorate monohydrate

In the title compounds, [Co(C 2 O 4 )(CH 5 N)) 4 ]ClO 4 (1), and [Co(C 2 O 4 )(C 2 H 7 N) 4 ]ClO 4 .H 2 O, (2), the Co atom has a distorted octahedral coordination composed of four amine ligands and one oxalato ligand. The coordination and oxalato bond distances in (1) and (2) are similar to the corresponding distances in [Co(C 2 O 4 )(NH 3 ) 4 ] + . The Co-N-C angles are in the range 117.1 (4)-123.2 (2)°.