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晶体中正负离子半径比(R^+/R^-)与晶胞和结晶形态
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作者 仲维卓 华素坤 《人工晶体学报》 EI CAS CSCD 北大核心 1998年第4期3-6,共4页
本文研究了AB型晶体中正负离子半径比(R+/R-)与晶胞和单形的显露以及硅酸盐系列晶体中的络阴离子结晶方位和对称分布与晶体的形貌的密切相关性,从中找出与结晶形态的相关性。提出晶胞界线是以负离子配位多面体的面、棱和角为... 本文研究了AB型晶体中正负离子半径比(R+/R-)与晶胞和单形的显露以及硅酸盐系列晶体中的络阴离子结晶方位和对称分布与晶体的形貌的密切相关性,从中找出与结晶形态的相关性。提出晶胞界线是以负离子配位多面体的面、棱和角为界面而划分的;晶体中负离子配位多面体的对称性与晶体形态的对称性是对应一致的。由此进一步阐明了组成晶体结晶形态的结构基元是负离子配位多面体。 展开更多
关键词 负离子配位多面体 电负性 络阴离子 晶体结构基元 晶体生长基元
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Crystal and Molecular Structure of(η~5-C_5H_5)_2Yb(NC_4H_4)(OC_4H_8)
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作者 Wang Shao-Wu Yu Yong-Fei +2 位作者 Hu Ji-ping Ye Zhong-Wen(Institute of Organic Chemistry,Anhui Normal University,Wuhu,Anhui 241000,China) Wei Ge-Cheng Jin Zhong-Sheng(Changchun Institute of Applied Chemistry,Academia Sinica,Changchun,Jilin 130022,China) 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 1994年第5期346-349,共4页
The complex(C_5H_5)2 Yb(NC4H4)(OC_4H_8) crystallizes in orthorhombic system with space group Pnma and a=15.552(4),b=12.491(3),c=8. 711(3),V=1692. 2(7),Z=4 and Dc=1.733 g/cm3. Crystal study has shown that the molecule ... The complex(C_5H_5)2 Yb(NC4H4)(OC_4H_8) crystallizes in orthorhombic system with space group Pnma and a=15.552(4),b=12.491(3),c=8. 711(3),V=1692. 2(7),Z=4 and Dc=1.733 g/cm3. Crystal study has shown that the molecule has crystallographic mirror symmetry.The Yb(Ⅲ) has a distorted tetrahedral coordination geometry. 展开更多
关键词 crystal structure LANTHANIDE pyrrolyl complex
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Synthesis and Crystal Structure of (Et_4N)_2[Pd_2 (mp)_2 (mpH)_2]
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作者 Shi Ji-Cheng Huang Xiao-Ying +4 位作者 Wen Ting-Bin Deng Yu-Heng Cheng Chang-Neng Liu Qiu-Tian Kang Bei-Sheng(State Key Laboratory of Structural Chemistry and Fujian institute of Research onthe Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 3 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 1995年第4期293-296,共4页
Dinuclear palladium complex (Et_4N)_2[Pd_2(mp)_2 (mpH)_2 (mpH=_2-SC_6H_4OH ) (M_r = 971. 95 ) is prepared in a reaction of sodium 2-mercaptophenolate (Na_2mp) with PdCl_2. It crystallizes in monoclinic with space grou... Dinuclear palladium complex (Et_4N)_2[Pd_2(mp)_2 (mpH)_2 (mpH=_2-SC_6H_4OH ) (M_r = 971. 95 ) is prepared in a reaction of sodium 2-mercaptophenolate (Na_2mp) with PdCl_2. It crystallizes in monoclinic with space group P2_1/n, a=9. 088(1),b=17. 851 (4), c=12. 932(2) , β= 93. 21 (1)°, V=2094. 7(7), D_c=1. 54 g/cm ̄3, F(000) = 1000, Z=2, and final R= 0. 044 and R_w= 0. 055 for 3090 reflections (I≥3σ(I)). Structure analysis revealed the multifunction chelating character of mp functions as S_tO_t(t for terminal) and S_bOH (b for bridging) in the complex. 展开更多
关键词 synthesis crystal structure 2-mercaptophenol dinuclear palladium complex
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Synthesis and Crystal Structure of Dinuclear Copper Cluster Compound [Cu(dtp)PPh_3]_2
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作者 陈秋华 黄建全 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 1994年第2期102-104,共3页
The title compound [Cu(dtp) PPh3]2 (dtp=S2,P(OEt)2) was prepared by heating the mononuclear compound Cu(dtp)(PPh3)2 in CH3CN solution.It crystallizes in the triclinic space group P1 with parameters a=9.71 6(5),b=11.02... The title compound [Cu(dtp) PPh3]2 (dtp=S2,P(OEt)2) was prepared by heating the mononuclear compound Cu(dtp)(PPh3)2 in CH3CN solution.It crystallizes in the triclinic space group P1 with parameters a=9.71 6(5),b=11.026(5),c=12.475(4) A.α=78.16(3)°,β=102. 64(4), γ=114.34(4)°,V=1178(1)A 3,Z=1,Dc=1.44 g/cm3,MoKα(λ=0.71069 A) μ=12. 48cm-1,F(000)=528.Final R=0.041.Rω= 0. 052 for 3653 unique intensity data(I≥3σ(I)).The molecule of the title compound can be viewed as a centrosymmetric dimer with two[Cu(dtp)(PPh3)] units,which are bridged by two S atoms belonging to the dtp ligands.The exact planar[Cu2S2] core and two[CuS2P] four-membered rings form a chair conformation.The Cu…Cu distance is 2.991(5) A. 展开更多
关键词 SYNTHESIS crystal structure copper cluster dinuclear compound
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Synthesis and Crystal Structure of Mercury BridgedBiferrocene Trinuclear Complex Hg(FcL)_2,Bis(S-methyl-N-(1-ferrocenyl-1-methyl)methylenedithiocarbazate)mercury(Ⅱ) 被引量:1
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作者 DUAN Chun-Ying LIU Ze-Hua +1 位作者 TIAN Yu-Peng YOU Xiao-Zeng(Coordination Chemistry Institute, State Key Laboratory of Coordination Chemistry,Nanjing Univrsity, Nanjing, 210093) 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 1998年第1期1-4,共4页
The title complex, mercury bridged biferrocene trinuclear complex Hg(FcL)2. Bis (S-methyl-N- (1-ferrocenyl-1-methyl) methylenedithiocarbazate) mercury,Crystallizes in space group Pbca with a =19. 510 (4), b=19. 921 (5... The title complex, mercury bridged biferrocene trinuclear complex Hg(FcL)2. Bis (S-methyl-N- (1-ferrocenyl-1-methyl) methylenedithiocarbazate) mercury,Crystallizes in space group Pbca with a =19. 510 (4), b=19. 921 (5), c=15. 581 (3)A. V=6095(3) A, Z=8,M.=863. 12, Dc=1.881 g/cm3; u=19. 24 cm-1 and F(000) = 3376. The final refinement of 2455 observed reflections is converged with R= 0. 043 and Rw=0.047. X-ray crystal structure analysis revealed that the coordinationgeometry of Hg atom is a distorted tetrahedron with two Hg-N bonds and two Hg- S bonds. The Schiff-base ligand loses a proton from its tautomeric thiol form and is cryordianted to the Hg aotm uia the mercapto sulphur and the β-nitrogen atoms. 展开更多
关键词 mercury(Ⅱ) bridged biferrocene trinuclear complex crystal structure
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