Monodentate N-coordination of a 1,2,3,5-dithiadiazolyl to Mn(II), Co(II) and Ni(II): A new coordination mode

The reaction of neutral radical ligand 4-(2′-cyanofuryl-5′)-1,2,3,5-dithiadiazolyl with a stoichiometric amount of bis(hexafluoroacetylacetonato)-manganese(II), -cobalt(II) or nickel(II) generates alternating metal-ligand chains in the solid state. The coordination mode of this ligand to the metal dication is unprecedented, providing the first evidence that the nitrogen atoms of a 1,2,3,5-dithiadiazolyl are capable of coordination to a metal dication in the absence of chelation.

Graphical abstractCoordination of neutral radical 4-(2′-cyanofuryl-5′)-1,2,3,5-dithiadiazolyl with bis(hexafluoroacetylacetonato)-manganese(II), -cobalt(II) or nickel(II) generates chain-like structures in the crystalline state. There are two metal coordination environments, one involving the nitrogen atoms of two nitrile groups and the other involving one nitrogen atom each of two dithiadiazolyl rings. This is the first evidence that monodentate N-coordination of a dithiadiazolyl ring can be achieved.Figure optionsDownload full-size imageDownload as PowerPoint slide