NaCl-type frameworks of [M(pyrazine)2NO2]ClO4 (M) Co, Cu), the first examples containing μ1,3-nitrito bridges showing antiferromagnetism

Two new 3D NaCl-type frameworks of [M(pyrazine)(2)NO2]ClO4 (M = Co, Cu), consist of (4, 4) sheets of metal-pyrazine connected by mu(1,3)-nitrito, representing the first examples of mu(1,3)-nitrito bridges and exhibiting antiferromagnetism.