Synthesis and Crystal Structure of [Cu 2 (H 2 O) 2 (phen) 2 (OH) 2 ][Cu 2 (phen) 2 (OH) 2 (CO 3 ) 2 ] · 10 H 2 O with phen = 1,10‐phenanthroline

The blue copper complex [Cu 2 (H 2 O) 2 (phen) 2 (OH) 2 ][Cu 2 (phen) 2 (OH) 2 (CO 3 ) 2 ] · 10 H 2 O, which was prepared by reaction of 1,10‐phenanthroline monohydrate, CuCl 2  · 2 H 2 O and Na 2 CO 3 in the presence of succinic acid in CH3OH/H 2 O at pH = 13.0, crystallized in the triclinic space group P 1 (no. 2) with cell dimensions: a  = 9.515(1) Å, b  = 12.039(1) Å, c  = 12.412(2) Å, α = 70.16(1)°, β = 85.45(1)°, γ = 81.85(1)°, V  = 1323.2(2) Å 3 , Z  = 1. The crystal structure consists of dinuclear [Cu 2 (H 2 O) 2 (phen) 2 (OH) 2 ] 2+ complex cations, dinuclear [Cu 2 (phen) 2 (OH) 2 (CO 3 ) 2 ] 2– complex anions and hydrogen bonded H 2 O molecules. In both the centrosymmetric dinuclear cation and anion, the Cu atoms are coordinated by two N atoms of one phen ligand, three O atoms of two μ‐OH groups and respectively one H 2 O molecule or one CO 3 2– anion to complete distorted [CuN 2 O 3 ] square‐pyramids with the H 2 O molecule or the CO 3 2– anion at the apical position (equatorial d(Cu–O) = 1.939–1.961 Å, d(Cu–N) = 2.026–2.051 Å and axial d(Cu–O) = 2.194, 2.252 Å). Two adjacent [CuN 2 O 3 ] square pyramids are condensed via two μ‐OH groups. Through the interionic hydrogen bonds, the dinuclear cations and anions are linked into 1D chains with parallel phen ligands on both sides. Interdigitation of phen ligands of neighboring 1D chains generated 2D layers, between which the hydrogen bonded water molecules are sandwiched.