In the title compound, [Ca(NO3)(C34H32N10)]NO3·3CH4O, the Ca II ion is coordinated by six N atoms of the EDTB ligand {EDTB is N,N,N′,N′-tetra-kis[(2-benzimidazol-yl)meth-yl]-1,2-ethanediamine} and two O atoms from the nitrate ligand, to form a distorted dodeca-hedral geometry. The crystal packing is stabilized by inter-molecular N - H⋯O, N - H⋯N and O - H⋯O hydrogen bonds, which link the constituent units into a three-dimensional network. The uncoordinated nitrate anion is disordered over two s...
