The title compound was synthesized by the solid-state reaction of (NH_4)_6Mo_7O_(24)·4H_2O, Na_2C_2O_4, NH_2OH·HCl and Bu_4NBr at 90 ℃ for 10 h and crystallized from acetone-ether. The green crystal belongs...The title compound was synthesized by the solid-state reaction of (NH_4)_6Mo_7O_(24)·4H_2O, Na_2C_2O_4, NH_2OH·HCl and Bu_4NBr at 90 ℃ for 10 h and crystallized from acetone-ether. The green crystal belongs to the monoclinic space group P2_1/n with a=9. 908(2), b= 17, 873(2), c= 13/450(2) A , β= 90. 09(1 )°,V = 2381. 6 (7 ) A￣3 , D_c = 1. 359 g/cm￣3 , Z= 2. The structure was refined to R =0. 0427 for 2562 reflections. The anion of the title compound can be described as an oxalate ligand (C_2O4￣2 ) bridging two [MoCl_2O(OH)] units, which contain Mo(V)atoms.展开更多
Two new supramoleeular polymers [ M （2-NH2 py）2 （ox） ] [ M = Co （1）, Ni （2） ; 2-NH2py = 2-aminopyridine; ox = oxalate ] were hydrothermally synthesized and characterized by elemental analyses, IR and single-cr...Two new supramoleeular polymers [ M （2-NH2 py）2 （ox） ] [ M = Co （1）, Ni （2） ; 2-NH2py = 2-aminopyridine; ox = oxalate ] were hydrothermally synthesized and characterized by elemental analyses, IR and single-crystal X-ray diffraction analyses. The isomorphic compounds 1 and 2 both possess one-dimensional zigzag chain structures, which are composed of [ M （2-NH2 py）2 ]^2＋ units bridged by tetradentate oxalate ligands to form three-dimensional supramolecular network v/a the C-H…O hydrogen bonds and π-π stacking interactions. Compound 1 displays antiferromagnetie interaction.展开更多
The complex [La2(m-ox){Cr(bipy)(m-ox)(ox)}4(H2O)6]?2.3(H2O) (C58H68.6N8O54.3Cr4La2) 1 has been obtained from the reaction of La(Ⅲ) salt with [Cr(bipy)(ox)2]- (bipy = 2,2?bipyridine and ox = oxalate dianion) building ...The complex [La2(m-ox){Cr(bipy)(m-ox)(ox)}4(H2O)6]?2.3(H2O) (C58H68.6N8O54.3Cr4La2) 1 has been obtained from the reaction of La(Ⅲ) salt with [Cr(bipy)(ox)2]- (bipy = 2,2?bipyridine and ox = oxalate dianion) building blocks in aqueous solution and structurally characterized by X-ray diffraction analysis. It crystallizes in monoclinic, space group P21/c with a = 10.740(2), b = 17.943(4), c = 22.388(5) ? V = 4314(2) 3, Z = 2, Mr = 2232.43, Dc = 1.719 g/cm3, F(000) = 2234, m(MoKa) = 1.565 cm-1 and T = 293(2) K. With the use of 5202 observed reflections (I > 2s(I)), the structure was refined to R = 0.0742 and wR = 0.1554. Complex 1 shows a two-dimensional open network constructed from hexanuclear {La2Cr4} units through the intermolecular hydrogen interactions.展开更多
文摘The title compound was synthesized by the solid-state reaction of (NH_4)_6Mo_7O_(24)·4H_2O, Na_2C_2O_4, NH_2OH·HCl and Bu_4NBr at 90 ℃ for 10 h and crystallized from acetone-ether. The green crystal belongs to the monoclinic space group P2_1/n with a=9. 908(2), b= 17, 873(2), c= 13/450(2) A , β= 90. 09(1 )°,V = 2381. 6 (7 ) A￣3 , D_c = 1. 359 g/cm￣3 , Z= 2. The structure was refined to R =0. 0427 for 2562 reflections. The anion of the title compound can be described as an oxalate ligand (C_2O4￣2 ) bridging two [MoCl_2O(OH)] units, which contain Mo(V)atoms.
基金Supported by the National Natural Science Foundation of China(Nos.20571032 and 20333070).
文摘Two new supramoleeular polymers [ M （2-NH2 py）2 （ox） ] [ M = Co （1）, Ni （2） ; 2-NH2py = 2-aminopyridine; ox = oxalate ] were hydrothermally synthesized and characterized by elemental analyses, IR and single-crystal X-ray diffraction analyses. The isomorphic compounds 1 and 2 both possess one-dimensional zigzag chain structures, which are composed of [ M （2-NH2 py）2 ]^2＋ units bridged by tetradentate oxalate ligands to form three-dimensional supramolecular network v/a the C-H…O hydrogen bonds and π-π stacking interactions. Compound 1 displays antiferromagnetie interaction.
基金The research was supported by the grants from the National Natural Science Foundation of China the Natural Science Foundation of Fujian Province and the Chinese Academy of Sciences
文摘The complex [La2(m-ox){Cr(bipy)(m-ox)(ox)}4(H2O)6]?2.3(H2O) (C58H68.6N8O54.3Cr4La2) 1 has been obtained from the reaction of La(Ⅲ) salt with [Cr(bipy)(ox)2]- (bipy = 2,2?bipyridine and ox = oxalate dianion) building blocks in aqueous solution and structurally characterized by X-ray diffraction analysis. It crystallizes in monoclinic, space group P21/c with a = 10.740(2), b = 17.943(4), c = 22.388(5) ? V = 4314(2) 3, Z = 2, Mr = 2232.43, Dc = 1.719 g/cm3, F(000) = 2234, m(MoKa) = 1.565 cm-1 and T = 293(2) K. With the use of 5202 observed reflections (I > 2s(I)), the structure was refined to R = 0.0742 and wR = 0.1554. Complex 1 shows a two-dimensional open network constructed from hexanuclear {La2Cr4} units through the intermolecular hydrogen interactions.
