Synthesis and crystal structure of Cu3(Bipy)2(L1)2(L2)2⋅ 4H2O(Bipy = 2,2′-bipyridine, L1 =1-((2-sulfonateethylimino)methyl)-2-naphthol), L2 = 2-hydroxy-1-naphthaldehyde)

The title compound, Cu3(Bipy)2(L1)2(L2)2⋅4H2O, was synthesized in the methanol solution of Bipy and Cu(II) in the presence of 1-((2-sulfonate-ethylimino)-methyl)-2-naphthol (L1), which was condensation compound of taurine and 2-hydroxy-1-naphthaldehyde. This complex crystallized in the space group P-1 with a = 9.825(2) Å, b = 12.626(2) Å, c = 14.342(3) Å, α = 90.29(1)∘, β = 100.67(1)∘, γ = 101.67(2)∘, and Z = 2. In the trinuclear Cu(II) complex, there are two type Cu atoms which have square and square pyramid geometries, respectively. The Cu–N distances vary from 1.965(3) to 2.000(4) Å, while the Cu–O distances are between 1.896(3) and 2.337(4) Å.