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国家自然科学基金(20361004)

作品数:3 被引量:1H指数:1
相关作者:王昆淼方瑞斌王丽赵琦华更多>>
相关机构:云南大学更多>>
发文基金:国家自然科学基金云南省自然科学基金更多>>
相关领域:理学更多>>

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SCN-桥联的一维链配位聚合物[Cd(dafo)(SCN)_2]_n的合成及晶体结构(英文)被引量:1
2006年
A new one-dimensional compound [Cd(dafo)(SCN)2]n (dafo=4,5-diazafluoren-9-one) has been synthesized and characterized by single crystal X-ray diffraction. It crystallizes in the orthorhombic system; space group Pbca with a=1.708 6(5), b=1.303 6(4), c=2.592 6(8) nm, V=5.775(3) nm3, and Z=16. The crystal structure revealed that the structure of [Cd(dafo)(SCN)2]n features μ-1,3-thiocyante bridges and 1D chains. It consists of octahedrally coordinated Cd atoms. Both Cd(1) and Cd(2) are surrounded by two nitrogen atoms from dafo, two S atoms and two N atoms from two di-μ-1,3 thiocyanato bridges. CCDC: 251185.
赵琦华王丽王昆淼方瑞斌
关键词:晶体结构
Syntheses and Crystal Structures of [Ni(L)_2(NCS)_2] and [Co(L)_2(NCS)_2](L=Azobis(2-pyridine)
2004年
The ligand azobis(2-pyridine) L was used in the synthesis of two new organic-inorganic coordination complexes: [Ni(L)2(NCS)2] 1 and [Co(L)2(NCS)2] 2. Crystal data for 1: monoclinic, space group C2/c, a = 13.361(18), b = 10.731(15), c = 18.14(2) ? β = 109.86(2)? V = 2446(6) 3, Z = 4, Mr = 543.25, Dc = 1.410 g/cm3, μ = 0.993 mm-1, F(000) = 1064, T = 298(2) K, R = 0.0454 and wR = 0.1010 for 1288 observed reflections with I > 2s(I); and those for 2: monoclinic, space group C2/c, a = 13.35(2), b = 10.806(15), c = 18.06(2) , β = 110.34(2)? Z = 4, Mr = 543.49, Dc = 1.413 g/cm3, μ = 0.902 mm-1, F(000) = 1060, T = 298(2) K, R = 0.0699 and wR = 0.1354 for 728 observed reflections with I > 2s(I). Single-crystal X-ray diffraction studies revealed that 1 and 2 have similar structures, in which each Ni(II) or Co(II) cation is coordinated by two L ligands and two terminal thiocynates (NCS-).
赵琦华刘宇奇方瑞斌
Synthesis and Crystal Structure of Cobalt(II) Complex [Co(H_2O)_2(bpe)(OAc)_2]·4,4'-dpdo
2004年
The reaction of Co(OAc)2 with bpe and 4,4?-dpdo in an aqueous-alcohol solution affords the formation of red crystals of [Co(H2O)2(bpe)(OAc)2]?4,4?-dpdo (bpe = trans-1,2-bis(4- pyridyl)ethylene, 4,4?-dpdo = 4,4?-dipyridyl N,N?-oxide). The molecular and crystal structures were determined by single-crystal X-ray diffraction. The crystal is of triclinic, space group P1 with a = 7.6146(9), b = 8.6691(11), c = 10.3440(11) ?, α = 88.311(3), β = 76.992(3), γ = 75.809(3)°, V = 644.76(13) ?3, Z = 1, C26H28CoN4O8, Mr = 583.45, Dc = 1.503 g/cm3, μ = 0.724 mm-1, F(000) = 303, T = 223(2) K, the final R = 0.0477 and wR = 0.1177 for 3199 observed reflections with I > 2σ(I). In the crystal the cobalt atom is six-coordinated by oxygen atoms from two carboxylic molecules, two nitrogen atoms from the bpe ligands and two water molecules, completing an octahedral geometry. The structure of the title complex consists of neutral chains containing cobalt(II) ions bridged by mutually trans bpe molecules. The adjacent chains are connected through weak hydrogen bonds to form a two-dimensional structure.
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