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镧系四元混合阴离子配合物[Ln(CCl3COO)2(CH3COO)(Phen)(H2O)]2的合成与晶体结构 总被引:2,自引:2,他引:0
在水乙醇溶液中合成了3 种四元混合阴离子配合物, 用元素分析、IR、UV 及单晶X射线衍射进行了表征。[La(CCl3COO)2(CH3COO)(Phen)(H2O)]2·2DMF 晶体属三斜晶系, P1 空间群, 晶胞参数:a= 1-2510(4) nm , b= 1-3460(5) nm , c = 1-0343(3) nm , α= 102-47(3)°, β= 102-34(2)°, γ= 113-82(2)°, μ(MoKα) = 20.47 cm -1 , Z= 1, Dc= 1-800 g·cm - 3 , F(000) = 780-00。稀土配合物中醋酸根以桥联方式配位, 三氯醋酸根则有2 种配位方式, 在二者共同参与配位的体系中呈现出丰富的配位模式。 相似文献
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All-Union Scientific-Research Institute for Chemical Reagents and Ultrapure Chemical Substances. Translated from Zhurnal Strukturnoi Khimii, Vol. 29, No. 1, pp. 104–108, January–February, 1988. 相似文献
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New mixed-ligand copper(I) complexes, [Cu(Phca2en)(PPh3)X], [Phca2en = N,N′-bis(β-phenylci-nnamaldehyde)-1,2-diiminoethane and X=Cl (1), Br (2), I (3), NCS (4), N3 (5)] have been synthesized and characterized by various techniques. 1H and 13C-NMR and IR spectral data of these copper(I) complexes are compared with the free ligand to elucidate some structural features. The structures of [Cu(Phca2en)(PPh3)Br] (2) and [Cu(Phca2en)(PPh3)I] (3) have been determined from single-crystal data showing that the coordination geometry around copper atom is a distorted tetrahedron. Furthermore, these Cu(I) complexes exhibit supramolecular motifs of the type multiple phenyl embraces resulting from attractive interactions between phenyl rings of PPh3 moieties. The presence of the C–H…Cu weak intramolecular hydrogen bonds, due to the trapping of C–H bonds in the vicinity of the metal atoms, is also reported. 相似文献
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镧系四元混合阴离子配合物[Pr(CH3CH2COO)2(NO3)(phen)2]合成和晶体结构 总被引:4,自引:1,他引:4
在含水溶剂、酸性环境中合成了镧系四元混合阴离子配合物[Pr(CH3CH2COO)2(NO3)(phen)]2并解析了其晶体结构,三斜,空间群P1,a=0.9650(2) nm, b=1.2949(4) nm,c=0.8994(2)nm, α=95.37(3)°,β=111.05(2)°,γ=102.87(2)°,V=1.0037(5) nm3, Dc=1.758 g·cm-3, Z=1, F(000)=528, μ(MoKα)=24.64 cm-1, R=0.024, RW=0.034。四个丙酸根呈二种配位方式,Pr3+为九配位。 相似文献
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《Mendeleev Communications》2023,33(1):61-63
The photochemistry of a potential light-activated anticancer complex, trans,trans,trans-[PtIV(py)2(N3)2(OH)2], was explored by steady-state and laser flash photolysis. The photolysis was a multistage process with the formation of complexes trans-[PtIV(py)2(N3)(OH)2(H2O)]+ and/or trans-[PtIV(py)2(N3)(OH)3] due to chain photoaquation at the first stage. 相似文献
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The preparation of trans-[Co(NH3)4(CH3NH2)Br]2+ and trans-[Co(NH3)4(CH3NH2)-(NO3)]2+ complexes is described. The UV-VIS spectra of the complexes indicate a decrease of the ligand field compared to the parent pentaammines. Infrared spectra match with the pattern of the corresponding pentaammines. The catalyzed (by Hg2+) aquation of the trans-bromomethylamine complex go under retention of the stereochemical configuration. The base hydrolysis (studied at 25°C) products show trans to cis rearrangement for both complexes. 1H NMR spectroscopy is used for identification of the stereochemical configuration of the compounds. 相似文献
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S. G. Shova I. G. Cadelnic M. Gdaniec Yu. A. Simonov T. C. Jovmir V. M. Meriacre G. Filoti C. I. Turta 《Journal of Structural Chemistry》1998,39(5):747-761
The structure of two trinuclear iron acetates [Fe3O(CH3COO)6(H2O)3]Cl· 6H2O (I) and [Fe3O(CH3COO)6(H2O)3][FeCl4] · 2CH3COOH (II) was determined by X-ray diffraction analysis. Crystals I and II are ionic and belong to the orthorhombic system with parameters a = 13.704(3), b = 23.332(5), c = 9.167(2) Å, R = 0.0355, space goup P21212 for I and a = 10.145(4), b = 15.323(6), c = 22.999(8) Å, R = 0.0752, space group Pbc21 for II. The complex cation [Fe3O(CH3COO)6(H2O)3]+ has a μ3-O-bridged structure typical for trinuclear iron (III) compounds. As shown by Mössbauer spectroscopy, the iron(III) ions are in the high-spin state. In trinuclear cations, antiferromagnetic exchange interaction takes place between the Fe(III) ions with the exchange parameter J = -26.69 cm?1 for II (Heisenberg-Dirac-Van Vleck model for D3h, symmetry). 相似文献
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[Fe(N2H4)2(CH3COO)2] was synthesised and characterized for the first time by chemical analysis, magnetic measurements, electronic and IR spectral studies. Its thermal reactivity was ascertained by thermogravimetric (TG) and derivative thermogravimetric (DTG) techniques and it has been concluded that unlike some other metal carboxylate hydrazinates, it does not show any autocatalytic behaviour. The decomposition was also subjected to kinetic analysis using the equations of Coats-Redfern and Horowitz-Metzger by the method of weighted least-squares. 相似文献
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Reaction between the Os(VI)-hydrazido complex, trans-[Os(VI)(tpy)(Cl)(2)(NN(CH(2))(4)O)](2+) (tpy = 2,2':6',2"-terpyridine and O(CH(2))(4)N(-) = morpholide), and a series of N- or O-bases gives as products the substituted Os(VI)-hydrazido complexes, trans-[Os(VI)(4'-RNtpy)(Cl)(2)(NN(CH(2))(4)O)](2+) or trans-[Os(VI)(4'-ROtpy)(Cl)(2)(NN(CH(2))(4)O)](2+) (RN(-) = anilide (PhNH(-)); S,S-diphenyl sulfilimide (Ph(2)S=N(-)); benzophenone imide (Ph(2)C=N(-)); piperidide ((CH(2))(5)N(-)); morpholide (O(CH(2))(4)N(-)); ethylamide (EtNH(-)); diethylamide (Et(2)N(-)); and tert-butylamide (t-BuNH(-)) and RO(-) = tert-butoxide (t-BuO(-)) and acetate (MeCO(2)(-)). The rate law for the formation of the morpholide-substituted complex is first order in trans-[Os(VI)(tpy)(Cl)(2)(NN(CH(2))(4)O)](2+) and second order in morpholine with k(morp)(25 degrees C, CH(3)CN) = (2.15 +/- 0.04) x 10(6) M(-)(2) s(-)(1). Possible mechanisms are proposed for substitution at the 4'-position of the tpy ligand by the added nucleophiles. The key features of the suggested mechanisms are the extraordinary electron withdrawing effect of Os(VI) on tpy and the ability of the metal to undergo intramolecular Os(VI) to Os(IV) electron transfer. These substituted Os(VI)-hydrazido complexes can be electrochemically reduced to the corresponding Os(V), Os(IV), and Os(III) forms. The Os-N bond length of 1.778(4) A and Os-N-N angle of 172.5(4) degrees in trans-[Os(VI)(4'-O(CH(2))(4)Ntpy)(Cl)(2)(NN(CH(2))(4)O)](2+) are consistent with sp-hybridization of the alpha-nitrogen of the hydrazido ligand and an Os-N triple bond. The extensive ring substitution chemistry implied for the Os(VI)-hydrazido complexes is discussed. 相似文献
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L. V. Gorobinskii K. A. Solntsev N. T. Kuznetsov 《Russian Journal of Coordination Chemistry》2002,28(7):451-453
Nucleophilic substitution reactions of the monosubstituted anions [B12H11X]2–, where X = OC(O)CH3, OH, SCN, and I, with pentanoic acid were studied. The obtained compounds were shown to contain the [B12H10X{OC(O)(CH2)3CH3}]2– anions. 相似文献
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Mel'nik S. G. Filinchuk Ya. E. Shtemenko A. V. 《Russian Journal of Coordination Chemistry》2004,30(11):786-791
Compound [Re2(CH3COO)2Cl4((CH3)2NCOCH3)2] is synthesized. The influence of parameters of the hydrothermal synthesis under elevated pressure on the yield of a target product and its molecular structure and physicochemical properties is studied. In the neutral complex with cis-arrangement of the bridging acetate and terminal chloride ligands with respect to the multiply bonded Re2
6+ complex-forming center, the Re–Re bond length is 2.2418(3) Å. Dimethylacetamide molecules are in the axial positions, the Re–O bond lengths being 2.304(3) and 2.321(4) Å. The influence of the donor ability of the axial substituents in analogous structures of the rhenium(III) binuclear clusters on the Re–Re and Re–Lax bond lengths is analyzed. 相似文献
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