Crystal and Electronic Structures of a New Two-dimensional Molecular Metal, α-Et2Me2N[Ni(dmit)2]2

The anion radical salt α-Et2Me2N[Ni(dmit)2]2 retains metallic behavior down to 1.5 K. Planar Ni(dmit)2 units lying side-by-side along the b axis stack along the c axis in such a way that one molecule overlaps with two molecules. Such a “spanning overlap” mode has provided two-dimensional electronic structure.