Unique self-assembled 2D metal-tetrazolate networks: crystal structure and magnetic properties of [M(pmtz)2](M = Co(II) and Fe(II); Hpmtz = 5-(pyrimidyl)tetrazole)

The title compounds, which have been prepared from M(II) salts (M = Co and Fe) and 5-(pyrimidyl)tetrazole under hydrothermal conditions, are isomorphous and exhibit a 2D square-grid-like structure; the cobalt complex is a spincanted antiferromagnet with Tc= 15 K.