Synthesis and structures of cis -WO2 complexes with 2,3-dihydroxynaphthalene

{Na(OCH₃)[H₃N(CH₂)₂NH₂]₂}[WO₂(C₁₀H₆O₂)₂] (1) was obtained by the reaction of Na₂WO₄ · 2H₂O with 2,3-dihydroxynaphthalene and ethylenediamine. [H₂N(CH₂)₃NH₃]₂[WO₂(C₁₀H₆O₂)₂] (2) was synthesized by the reaction of Na₂WO₄ · 2H₂O with 2,3-dihydroxynaphthalene and 1,3-propylenediamine. Complex 1 was a one-dimensional chain-like structure and the Na atom is in the structure, while complex 2 was a discrete monomer without Na in its structure. The two complexes were synthesized in the same reaction conditions, except that protonated ethylenediamine was used in reaction 1, but 1,3-propylenediamine in reaction 2.