Manganese(II) complexes of pyridyl-azo-imidazoles. Single crystal X-ray structures of 3′-PyaiH and [Mn(3′- PyaiEt)4](ClO4)2 (3′-PyaiH = 2-(3′-pyridylazo)imidazole; 3′-PyaiEt = 1-ethyl-2-(3′-pyridylazo)imidazole)

The X-ray structure of 2-[(3′-Pyridyl)azo]imidazole (3′-PyaiH) shows a hydrogen bonded 1D chain. 1-Alkyl-2-[(3′-pyridyl)azo]imidazole (3′-PyaiR′) gives tetrahedral [Mn(3′-PyaiR′)4](ClO4)2. The structure has been confirmed by an X-ray study in one case. Azido and thiocyanato complexes, [Mn(3′-PyaiR′)2(X)2] (X = N3, NCS) are also described.