C 27H24CuN4O6S, monoclinic, C1c1(no. 9), a =17.405(7) Å, b =13.074(6) Å, c =13.267(7) Å, b =123.45(2)°, V =2519.1 Å 3 , Z =4,R gt (F) =0.046, wR ref (F 2 ) =0.126, T =291 K.
Source of materialReagents and solvents used were of commercially available quality. 1,10-Phenanthroline (phen, 0.2 mmol), melamine (0.1 mmol), CuSO 4 · 5H 2 O(0.1 mmol), propane-1,2-diol (2.0 ml) and water (1.0 ml) were mixed and placed in athick Pyrex tube, which was sealed and heated to 403 Kf or 72 h. The tube was cooled to ambient temperature spontaneously, and blue blockshaped crystals of the title compound were obtained.
Experimental detailsThe hydrogen atoms were positioned geometrically and allowed to ride on their parent atoms, with d(C-H) =0.93 -0.98 Å andThe sulfate ion is disorded over two positions with refined site occupancies of 0.51(1) and 0.49(1). The presence of pseudosymmetry in the structure suggests the higher symmetry space group C2/c but attempts to refine the structure in this space group resulted in high R and wR values, moreover, the solvent propane-1,2-diol molecule does not exhibit two-fold symmetry. Hence the requirement to solve in Cc.The Flack parameter was refined as afull least-squares parameter, and the refined value of 0.49(3) suggests inversion twinning. The twinning has been applied in the refinement with 1539 Friedel pairs [1].
DiscussionThe design and synthesis of metal-organic complexes or polymeric coordination networks is arapidly developing field in coordination and supramolecular chemistry during the past decades [2][3][4][5]. Many N-containing bidentate ligands, such as 1,10-phenanthroline, 4,4'-bipyridine and 2,2'-bipyridine as auxiliary ligand have been widely applied in constructing coordination polymers [6,7]. In the past few years, we have synthesized and reported some transition metal complexes with bidentate-chelating sulfate auxiliary ligand via aa lcohol-solvothermal reaction [8][9][10][11][12][13][14][15], the title compound was unexpectedly obtained during an attempt to synthesize ac omplex of Cu-complex with bidentatechelating sulfate ligand by the similar route. X-ray diffraction indicated that the Cu 2+ ions are in ad istorted square-pyramidal coordination formed by four Natoms (N1, N2, N3, N4) from two chelating phen ligands and an Oa tom (O3) from amonodentate sulfate ligand, the N1, N2, N3 and N4 atoms comprise asquare, and the O3 atom the apex of asquare pyramid. The Cu-Nbond lengths and N-Cu-Nangle are in the range of 1.991(7) -2 .154(8) Å and 80.4(3) -8 0.7(3)°,r espectively. The two chelating N-C-C-Ng roups subtend ad ihedral angle of 84.9(4)°.This apical Cu-O3 distance is 1.40(1) Å. In the crystal structure, the metal complex and solvent molecule are held together by intermolecular hydrogen bonds: d(O5-H51···O1) =2 .81(1) Å, ∠O5-H51···O1 =1 71.4°and d(O6-H61···O2) =2 .81(1) Å, ∠O6-H61···O2 =1 61.5°,w hich helps to further stabilize the crystal structure.