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1.
Two rare-earth metal coordination compounds, (NH 4) 4[Sm III2(Httha) 2]·16H 2O ( 1) (H 6ttha?=?triethylenetetramine- N,N,N′ ,N′′ ,N′′′ ,N′′′-hexaacetic acid) and (NH 4) 4[Sm III2(dtpa) 2]·10H 2O ( 2) (H 5dtpa?=?diethylenetriamine- N,N,N′ ,N′′ ,N′′-pentaacetic acid), have been synthesized through reflux and characterized by FT -IR spectroscopy, thermal analysis, and single-crystal X-ray diffraction techniques. Sm III of (NH 4) 4[Sm III2(Httha) 2]·16H 2O ( 1) is nine-coordinate, forming tricapped trigonal prismatic coordination with three amine nitrogens and six oxygens, in which four oxygens are from one ttha and two from the other ttha. (NH 4) 4[Sm III2(Httha) 2]·16H 2O ( 1) crystallizes in the monoclinic crystal system with P2(1)/c space group. The crystal data are: a?=?13.9340(13) Å, b?=?22.890(3) Å, c?=?20.708(2) (14) Å, β?=?99.521(2)°, and V?=?6513.7(13) Å 3. There are two –NH +– groups in the [Sm III2(Httha) 2] 4?. The polymeric (NH 4) 4[Sm III2(dtpa) 2]·10H 2O ( 2) also is nine-coordinate with tricapped trigonal prismatic conformation and crystallizes in the triclinic crystal system with P–1 space group. The cell dimensions are: a?=?9.8240(8) Å, b?=?10.0329(9) Å, c?=?13.0941(11) Å, β?=?77.1640(10)°, and V?=?1227.30(18) Å 3. In (NH 4) 4[Sm III2(dtpa) 2]·10H 2O, there are two types of ammonium cations, which connect [Sm III2(dtpa) 2] 4? and lattice water through hydrogen bonds, leading to a 2-D ladder-like layer structure. 相似文献
2.
Na[Yb III(Cydta)(H 2O) 2] · 5H 2O ( 1) (H 4Cydta = trans-1,2-cyclohexanediamine-N,N,N′,N′-tetraacetic acid) and [Yb III(Hegta)] · 2H 2O ( 2) (H 4egta = ethyleneglycol- bis-(2-aminoethylether)-N,N,N′,N′-tetraacetic acid) were prepared and their composition and structures were determined by elemental analyses and single-crystal X-ray diffraction techniques. Complex 1 crystallized in the triclinic crystal system with space group P 1; the Yb III is eight-coordinate by a hexadentate Cydta and two water molecules. Complex 2 is a protonated egta complex, crystallized in the monoclinic crystal system with space group P 2 1 /c; Yb III is coordinated only by the octadentate Hegta ligand. Both these complexes adopt a pseudo-square antiprismatic conformation. 相似文献
4.
Two title rare earth metal coordination compounds, (MnH)[Gd III(Edta)(H 2O) 3] · 4H 2O ( I) and (MnH) 2[Gd 2 III (H 2Ttha) 2] · 4H 2O ( II), where Mn = methylamine, H 4Edta = ethylenediamine-N,N,N′,N′-tetraacetic acid, H 6Ttha = triethylenetetramine-N,N,N′,N″,N′″,N′″-hexaacetic acid), have been successfully synthesized through direct heating reflux and characterized by FT-IR spectroscopy, thermal analysis and single-crystal X-ray diffraction techniques. In complex I, the Gd 3+ ion is nine-coordinated by an Edta ligand and three water molecules, yielding a pseudo-monocapped square antiprismatic (MC-SAP) conformation. Complex I crystallizes in the orthorhombic crystal system with space group Fdd2. The cell dimensions are as follows: a = 19.5207(17), b = 35.387(3), c = 12.5118(11) Å, and V = 8642.8(13) Å 3. The central Gd 3+ ion of II is also ninecoordinate, forming tricapped trigonal prismatic (TC-TP) conformation with three amine nitrogen atoms and six oxygen atoms. Complex II crystallizes in the monoclinic crystal system with P2/ c space group. The crystal data are as follows: a = 14.4301(13), b = 11.2400(11), c = 17.7102(16) Å, β = 112.606(2)°, and V = 2651.8(4) Å 3. There retain outer-protonated and inner-protonated carboxyl oxygen atoms in the [Gd 2 III (H 2Ttha) 2] 2? complex anion. In II, there are only one type of methylamine cation (MnH +) as the counter ion, which connects [Gd 2 III (H 2Ttha) 2] 2? complex anions and lattice water molecules through hydrogen bonds, leading to the formation of 2D ladder-like layer structure. 相似文献
5.
Two novel rare-earth metal complexes, namely, mononuclear Na 4[Eu III(Dtpa)(H 2O)] 2 · 11.5H 2O ( I) and binuciear (NH 4) 4[Eu III(Dtpa)] 2 · 10H 2O ( II) (H 5Dtpa = diethylenetriamine-N,N,N??,N??,N??-pentaacetic acid), have successfully been synthesized and characterized by infrared spectrum, UV-Vis spectrum, fluorescence spectrum, thermal analysis, and single-crystal X-ray diffraction techniques. Since these two Eu(III) complexes have different counterions, causing different coordination environment, fluorescence spectrum analysis displays different fluorescence properties. X-ray diffraction reveals that the coordination polyhedra of both complexes adopt pseudo- D 3h tricapped trigonal prismatic conformation. However, I is a nine-coordinate mononuclear complex and crystallizes in the monoclinic crystal space group P2 1/ n and II is a nine-coordinate binuciear complex and crystallizes in the triclinic crystal space group $P\bar 1$ . In addition, II has two independent binuciear structural units, [Eu(1) 2(Dtpa) 2] and [Eu(2) 2(Dtpa) 2]. Along the yz plane both [Eu(1) 2(Dtpa) 2] and [Eu(2) 2(Dtpa) 2] form a 1D chain structure, respectively. Further, along the y axis linking of each other forms a 2D planar structure. 相似文献
6.
Three complexes, Na 4[Dy III(dtpa)(H 2O)] 2?·?16H 2O, Na[Dy III(edta)(H 2O) 3]?·?3.25H 2O and Na 3[Dy III (nta) 2(H 2O)]?·?5.5H 2O, have been synthesized in aqueous solution and characterized by FT–IR, elemental analyses, TG–DTA and single-crystal X-ray diffraction. Na 4[Dy III(dtpa)(H 2O)] 2?·?16H 2O crystallizes in the monoclinic system with P2 1/ n space group, a?=?18.158(10)?Å, b?=?14.968(9)?Å, c?=?20.769(12)?Å, β?=?108.552(9)°, V?=?5351(5)?Å 3, Z?=?4, M?=?1517.87?g?mol ?1, D c?=?1.879?g?cm ?3, μ?=?2.914?mm ?1, F(000)?=?3032, and its structure is refined to R 1( F)?=?0.0500 for 9384 observed reflections [ I?>?2σ( I)]. Na[Dy III(edta)(H 2O) 3]?·?3.25H 2O crystallizes in the orthorhombic system with Fdd2 space group, a?=?19.338(7)?Å, b?=?35.378(13)?Å, c?=?12.137(5)?Å, β?=?90°, V?=?8303(5)?Å 3, Z?=?16, M?=?586.31?g?mol ?1, D c?=?1.876?g?cm ?3, μ?=?3.690?mm ?1, F(000)?=?4632, and its structure is refined to R 1( F)?=?0.0307 for 4027 observed reflections [ I?>?2σ( I)]. Na 3[Dy III(nta) 2(H 2O)]?·?5.5H 2O crystallizes in the orthorhombic system with Pccn space group, a?=?15.964(12)?Å, b?=?19.665(15)?Å, c?=?14.552(11)?Å, β?=?90°, V?=?4568(6)?Å 3, Z?=?8, M?=?724.81?g?mol ?1, D c?=?2.102?g?cm ?3, μ?=?3.422?mm ?1, F(000)?=?2848, and its structure is refined to R 1( F)?=?0.0449 for 4033 observed reflections [ I?>?2?σ( I)]. The coordination polyhedra are tricapped trigonal prism for Na 4[Dy III(dtpa)(H 2O)] 2?·?16H 2O and Na 3[Dy III(nta) 2(H 2O)]?·?5.5H 2O, but monocapped square antiprism for Na[Dy III(edta)(H 2O) 3]?·?3.25H 2O. The crystal structures of these three complexes are completely different from one another. The three-dimensional geometries of three polymers are 3-D layer-shaped structure for Na 4[Dy III(dtpa)(H 2O)] 2?·?16H 2O, 1-D zigzag type structure for Na[Dy III(edta)(H 2O) 3]?·?3.25H 2O and a 2-D parallelogram for Na 3[Dy III(nta) 2(H 2O)]?·?5.5H 2O. According to thermal analyses, the collapsing temperatures are 356°C for Na 4[Dy III(dtpa)(H 2O)] 2?·?16H 2O, 371°C for Na[Dy III(edta)(H 2O) 3]?·?3.25H 2O and 387°C for Na 3[Dy III(nta) 2(H 2O)]?·?5.5H 2O, which indicates that their crystal structures are very stable. 相似文献
7.
The (enH 2)[Gd III 2(pdta) 2(H 2O) 2]?·?8H 2O ( 1) (en?=?ethylenediamine and H 4pdta?=?propylenediamine- N,? N,? N′,? N′-tetraacetic acid) and (enH 2)[Gd III(egta)(H 2O)] 2?·?6H 2O ( 2) (H 4egta?=?ethyleneglycol-bis-(2-aminoethylether)- N,? N,? N′,? N′-tetraacetic acid) complexes were synthesized and characterized by infrared spectrum, thermal analysis, and single-crystal X-ray diffraction. The complex (enH 2)[Gd III 2(pdta) 2(H 2O) 2]?·?8H 2O has a binuclear eight-coordinate structure with pseudo square antiprism and crystallizes in the monoclinic crystal system with C2/ c space group. Through a carboxylate bridge, an infinite 1-D zigzag polymeric binuclear [Gd III 2(pdta) 2(H 2O) 2] 2? complex anion is formed. All infinite zigzag polymeric complex anions link through hydrogen bonds, yielding a layer structure. (enH 2)[Gd III(egta)(H 2O)] 2?·?6H 2O has a mononuclear nine-coordinate structure with pseudo monocapped square antiprism and crystallizes in the monoclinic crystal system with P2 1/ n space group. Each enH 2 2+ cation, through hydrogen bonds, connects two adjacent [Gd III(egta)(H 2O)] ? complex anions. 相似文献
8.
The crystal and molecular structures of the K[Eu III(Edta)(H 2O) 3] 3.5H 2O ( I) (H 4Edta = ethylenediaminetetraacetic acid) and K 4[Eu 2III(HTtha) 2] 13.5H 2O ( II) (H 6Ttha = triethylenetetraminehexaacetic acid) complexes have been determined by single-crystal X-ray diffraction analyses. The crystal of I belongs to orthorhombic crystal system and Fdd2 space group. The crystal data are as follows: a = 1.9849(6)nm, b = 3.5598(11)nm, c = 1.2222(4)nm, V = 8.636(5)nm 3, Z = 16, M = 596.37, (calcd) = 1.835g/cm 3, µ= 3.166mm –1, and F (000) = 4752. The final R and wR values are 0.0269 and 0.0692 for 2936 ( I > 2.0 ( I)) reflections and 0.0317 and 0.0708 for all 7284 unique reflections, respectively. The [Eu III(Edta)(H 2O) 3] – complex anion has a nine-coordination pseudo-monocapped square antiprismatic structure in which the nine coordinated atom are two N and seven O atoms (four from one Edta ligand and three water molecules). The crystal of II belongs to monoclinic system and P2 1/ n space group. The crystal data are as follows: a = 1.1337(3)nm, b = 2.5753(6)nm, c = 2.2138(6) nm, = 102.871(5)°, V = 6.301(3) nm 3, Z = 4, M = 1682.33, (calcd) = 1.773g/cm 3, = 2.339mm –1, and F(000) = 3404. The final R and wR are 0.0514 and 0.0906 for 11144 ( I> 2.0( I)) reflections and 0.0976 and 0.1068 for all 26 048 unique reflections, respectively. The whole complex molecule is composed of two close parts in which every one has a nine-coordination structure as a distorted monocapped square antiprism. The Ttha ligand in the [Eu
2III(HTtha) 2] 4– complex anion coordinates to one central Eu 3+ ion with three N atoms and four O atoms and to the other Eu 3+ ion with two O atoms.From Koordinatsionnaya Khimiya, Vol. 30, No. 12, 2004, pp. 901–909.Original English Text Copyright © 2004 by J. Wang, X. Zhang, Y. Zhang, Y. Wang, X. Liu, Z. Liu.This article was submitted by the authors in English. 相似文献
9.
The binuclear complexes [Cu 2L 2(H 2O) 4] · 5H 2O ( 1) and [Ni 2L 2(H 2O) 4] · 2H 2O ( 2) (where L = C 11H 11NO 5S, H 2 L = 2-[(3-formyl-5-methyl-2-hydroxy-benzylidene)-amino]ethanesulfonic acid) have been synthesized and characterized by IR, elemental analysis and X-ray diffraction. The crystals belong to the monoclinic system, space group P2 1/ c. Complex 1: a = 16.8902(12), b = 11.2829(6), c = 17.4249(11) Å; β = 106.709(4)°; S = 1.131; V = 3180.5(3) Å 3; Z = 4; D Calcd = 1.729 g cm ?3; F(000) = 1712; μ = 1.554 mm ?1; R 1 = 0.0519, wR 2 = 0.1349; complex 2: a = 11.399(2), b = 19.985(3), c = 7.3694(10) Å; β = 108.664(7)°; S = 1.157; V = 1590.6(4) Å 3; Z = 2; D Calcd = 1.604 g cm ?3; F(000) = 800; μ = 1.388 mm ?1; R 1 = 0.1859, wR 2 = 0.4346. The geometry around each metal(II) center can be described as slightly distorted octahedral. Water-sulfonic clusters and (H 2O) 4 water clusters can be observed for 1 from the crystal packing diagram, while cavity and offset face-to-face π–π stacking can be observed for 2. The complexes have been tested for the antibacterial activities which show antibacterial activities of 1 for β-hemolytic streptococcus, Staphylococcus aureus and Escherichia coli, and the antibacterial activity of 2 only for β-hemolytic streptococcus. 相似文献
10.
Two title complexes, [Tb III(Eg3a)(H 2O) 2] · 4.5H 2O ( I) (H 3Eg3a = 3-carboxymethyl-6, 9-dioxa-3,12-diazatetradecanedioic acid) and K[Tb III(Edta)(H 2O) 3] · 5H 2O( II) (H 4Edta = ethylenediamine-N,N,N′,N′-tetraaceti acid), were prepared and characterized by FT-IR, elemental analyses, TGA-DTA-DTG, and single-crystal X-ray diffraction technique. For I, the Tb 3+ ion is nine-coordinated by an Eg3a ligand and two coordination water molecules, yielding a monocapped square-antiprismatic (MCSAP) conformation. Complex I crystallizes in the monoclinic system with P2 1/ c space group. The crystal data are as follows: a = 9.237(3), b = 10.018(3), c = 23.580(7) Å, β = 99.021(5)°, V = 2155.2(11) Å 3, Z = 4, ρ = 1.822 Mg m ?3, μ = 3.353 mm ?1, F(000) = 1180, R 1 = 0.0445 and wR 2 = 0.1034 for 4262 observed reflections with I ≥ 2σ( I). For II, the Tb 3+ ion is nine-coordinated by an Edta ligand and three coordinate water molecules also yielding a MCSAP conformation. Complex II crystallizes in the orthorhombic system with Fdd2 space group. The crystal data are as follows: a = 19.373(5), b = 35.429(10), c = 12.114(3) Å, V = 8315(4) Å 3, Z = 16, ρ = 2.014 Mg m ?3, μ = 2.014 mm ?1, F(000) = 5024, R 1 = 0.0224 and wR 2 = 0.0557 for 3189 observed reflections with I ≥ 2σ( I). The potassium cations bridge the coordination spheres yielding many infinite long 1-D zigzag-type chains. The molecular structure of I is more stable than that of II. According to thermal analyses, the collapsing temperatures of crystal structure are 314°C for I and 348°C for II, which indicates that the crystal structure of II is more stable. 相似文献
11.
The three title complexes, NH 4[Ho III(Edta)(H 2O) 3] · 1.5H 2O (I) (H 4Edta = ethylenedianine-N,N,N′,N′-tetraacetic acid), (NH 4) 4[Ho 2 III (Dtpa) 2] · 9H 2O (II) (H 5Dtpa = diethylenetriamine-N,N,N′,N″,N″-entaacetic acid), and (NH 4) 3[Ho III(Ttha)] · 5H 2O (III) (H 6 Ttha = triethylenetetramine-N,N,N′,N″,N?,N?-hexaacetic acid), have been prepared and characterized by FT-IR, elemental analyses, and single-crystal X-ray diffraction technique. Complex I has a nine-coordinate mononuclear structure with distorted monocapped square antiprismatic conformation and its crystal structure belongs to orthorhombic system and Fdd2 space group. The crystal data are as follows: a = 19.343(9), b = 35.125(17), c = 12.364(6) Å, V = 8400(7) Å 3, Z = 16, M = 552.26, ρ calcd = 1.747 g cm ?3 μ = 3.828 mm ?1, and F(000) = 4368. Complex II has a binuclear nine-coordinate pseudomonocapped square antiprismatic conformation and its crystal structure belongs to triclinic system and space P1 group. The crystal data are as follows: a = 9.7637(16), b = 9.9722(16), c = 12.945(2) Å, α= 85.853(2)°, β = 77. 140(2)°, γ = 77.140(2)°, V = 1198.4(3) Å 3, Z = 1, M = 1340.80, ρ calcd = 1.858 g cm ?3, μ = 3.380 mm ?1, and F(000) = 674. As for complex III, it also has nine-coordinate mononuclear structure with distorted tricapped trigonal prism and its crystal structure belongs to monoclinic system and P2 1/ c space group. The crystal data are as follows: a = 10.349(3), b = 12.760(4), c = 23.142(7) Å, β = 91.020(6)°, V = 3055.6(16) Å 3, Z = 2, M = 797.55, ρ calcd = 1.734 g cm ?3, μ = 2.674 mm ?1, and F(000) = 1624. The results showed that although the ligands are different from one another in the shape and the numbers of coordination atoms, they all have nine-coordinate structures. However, one of them has binuclear structure and the other two have mononuclear structures because of the difference of the ligands. 相似文献
12.
Two lanthanide complexes, (mnH) 2[Eu III(egta)] 2·6H 2O ( 1) (H 4egta = ethyleneglycol-bis-(2aminoethylether)- N,N,N′ ,N′-tetraacetic acid) and (mnH) 4[Eu III2(dtpa) 2]·6H 2O ( 2) (H 5dtpa = diethylenetriamine- N,N,N′ ,N″,N″-pentaacetic acid), have been synthesized and characterized by FT -IR spectroscopy, thermal analysis, and single-crystal X-ray diffraction. X-ray diffraction reveals that 1 is multinuclear nine-coordinate and crystallizes in the monoclinic crystal system with space group C2/c. The obtained cell dimensions are a = 38.513(3)?Å, b = 13.5877(8)?Å, c = 8.7051(5)?Å, β = 99.6780(10)°, and 4490.6(5)?Å 3. Each methylamine (mnH +) cation in 1, through hydrogen bonds, connects three adjacent [Eu III(egta)] ? anions. The [Eu III(egta)] ? anions connect one another forming a 1-D multinuclear zigzag chain structure along the c-axis. Complex 2 is nine-coordinate binuclear structure with tricapped trigonal prismatic conformation and crystallizing in the monoclinic crystal system, but with space group P21/n. The obtained cell dimensions are a = 9.9132(8)?Å, b = 24.1027(18)?Å, c = 10.7120(10)?Å, β = 109.1220(10)°, and 2418.2(3)?Å 3. For 2, there are two kinds of methylamine cations (mnH +) connecting [Eu III2(dtpa) 2] 4? complex anions and lattice waters through hydrogen bonds, leading to formation of a 2-D ladder-like layer structure. 相似文献
13.
Two novel rare earth metal coordination compounds, (MnH)4[Ho
III2
(Dtpa)2] · 12H2O (I) (Mn = methylamine, H5Dtpa = diethylenetriamine-N,N,N′,N″,N″-pentaaceticacid) and {(MnH)[HoIII(Egta)] · 3H2O}
n
(II) (H4Egta = ethyleneglycol-bis(2-aminoethylether)-N,N,N′,N′-tetraacetic acid) have been successfully synthesized through direct heating reflux and characterized by FT-IR spectroscopy, thermal analysis, and single-crystal X-ray diffraction techniques (CIF files CCDC nos. 890878 (I) and 1457061 (II)). Complex I shapes a binuclear nine-coordinate structure with distorted tricapped trigonal prismatic conformation and crystallizes in the triclinic crystal system with space group P1?. The central Ho3+ ion is coordinated by three nitrogens and six oxygens from two octadentate Dtpa ligands. The cell dimensions are as follows: a = 9.8420(10), b = 12.1319(13), c = 13.2931(15) Å, α = 89.223(2)°, β = 68.4280(10)°, γ = 72.1280(10)° and V = 1396.0(3) Å3. Complex II adopts a polynuclear nine-coordinate structure with pseudo-monocapped square antiprismatic conformation and crystallizes in the monoclinic crystal system with space group C2/c. The central Ho3+ ion is coordinated by two nitrogens and seven oxygens from two octadentate Egta ligands. The crystal data are as follows: a = 38.4755(13), b =13.5569(5), c = 8.7343(3) Å, β = 100.135(3)° and V = 4484.8(3) Å3. 相似文献
14.
The title complexes, K 3[Cd(Dtpa)] (H 5Dtpa = diethylenetriamine-N,N,N,N′,N′-pentaacetic acid, (I)), K 2[Cd(H 2O) 4][Cd(Edta)(H 2O)] 2 · 2H 2O (H 4Edta = ethylenediamine-N,N,N′,N′-tetraacetic acid, (II)), and Na 2[Cd(H 2O) 4][Cd(Edta)(H 2O)] 2 · 2H 2O (III), were prepared, and their compositions and structures were determined by elemental analyses, IR spectra, and single-crystal X-ray diffraction techniques, respectively. In complex I, the Cd is seven-coordinated by one Dtpa ligand yielding a pseudo-monocapped trigonal prism conformation, and the complex crystallizes in the triclinic crystal system with the Pi space group. The crystal data are as follows: a = 8.7300(17), b = 9.1200(18), c = 15.110(3) Å, α = 95.52(3)°, β = 96.59(3)°, γ = 99.63(3)°, V = 1170.0(4) Å 3, Z = 2, ρ = 1.754 g/cm 3, μ = 1.519 mm ?1, F(000) = 616, R = 0.0644 and wR = 0.1712 for 3842 observed reflections with I ≥ 2σ( I). For complex II, in the [Cd(Edta)(H 2O)] 2? complex anion the Cd 2+ ion is seven-coordinated by one Edta ligand and one water molecule, yielding a pseudo-pentagonal bipyramid conformation. In the [Cd(H 2O) 4] 2+ cation, the bridged Cd is six-coordinated, yielding an almost standard octahedral conformation. The complex crystallizes in the monoclinic system with P2 1/ n space group. The crystal data are as follows: a = 9.098(3), b = 16.442(6), c = 12.023(4) Å, β = 91.053(6)°, V = 1798.3(12) Å 3, Z = 2, ρ = 2.098 g/cm 3, μ = 2.086 mm ?1, F(000) =1124, R = 0.0406 and wR = 0.1152 for 3680 observed reflections with I ≥ 2σ( I). In complex III, the conformations of Cd 2+ ions are similar to those of the potassium salt complex, and the complex also crystallizes in the monoclinic crystal system with the P2 1/ n space group. The crystal data are as follows: a = 9.134(7), b = 16.500(13), c = 12.075(10) Å, β = 91.054(12)°, V = 1820(2) Å 3, Z = 2, ρ = 2.015 g/cm 3, μ = 1.856 mm ?1, F(000) = 1092, R = 0.0363 and wR = 0.0879 for 3707 observed reflections with I ≥ 2σ( I). 相似文献
16.
Two dysprosium coordination compounds, (mnH) 2[Dy III(Httha)]·3H 2O ( 1) (H 6ttha?=?triethylenetetramine-N,N,N′,N″,N′′′,N′′′-hexaacetic acid and mn?=?methylamine) and (enH 2) 3[Dy III(ttha)] 2·9H 2O ( 2) (en?=?ethylenediamine), were synthesized through direct heating and characterized by elemental analysis, FT-IR, thermal analysis, and single-crystal X-ray diffraction. X-ray diffraction analysis displays that 1 is a mononuclear nine-coordinate complex with a pseudo-monocapped square antiprismatic conformation (MCSAP) crystallizing in the monoclinic crystal system with P2(1)/c space group. The crystal data are as follows: a?=?16.1363(19)?Å, b?=?13.9336(11)?Å, c?=?13.6619(14)?Å, β?=?102.2490(10)°, and V?=?3001.8(5)?Å 3. There are two kinds of methylamine cation in 1. They connect [Dy III(Httha)] 2?and crystal waters through hydrogen bonds, leading to formation of a 2-D ladder-like layer structure. The polymeric 2 also is a nine-coordinate structure with a pseudo-MCSAP crystallizing in the monoclinic crystal system with P2/c space group. The cell dimensions are: a?=?17.7801(16)?Å, b?=?9.7035(10)?Å, c?=?22.096(2)?Å, β?=?118.874(2)°, and V?=?3338.3(6)?Å 3. In 2 there are also two types of ethylenediamine cations. One connects three adjacent [Dy III(ttha)] 3? complex anions through hydrogen bonds and the other is symmetrical forming hydrogen bonds with two neighboring [Dy III(ttha)] 3? complex anions. These hydrogen bonds result in formation of a 2-D ladder-like layer structure as well. 相似文献
17.
Two novel complexes, (EnH 2) 1.5[Ho III(Ttha)] · 4.5H 2O ( I) (En = ethylenediamine and H 6Ttha = triethylenetetramine-N,N,N′,N″,N?,N?-hexaacetic acid) and (EnH 2)[Ho III(Egta)(H 2O)] 2 · 6H 2O ( II) (H 4Egta = ethyleneglycol-bis(2-aminoethylether)-N,N,N′,N′-tetraacetic acid), were synthesized and their crystal structures were determined by single crystal X-ray diffraction techniques. Complex I has a nine-coordinate mononuclear structure with distorted tricapped trigonal prismatic conformation and crystallizes in the monoclinic crystal system with P2/ n space group. The crystal data are as follows: a = 17.7541(18), b = 9.6810(10), c = 22.166(2) Å, β = 118.913(2)°, and V = 3335.0(6) Å 3. Complex II has a mononuclear nine-coordinate structure with pseudo-monocapped square antiprismatic conformation and crystallizes in the monoclinic crystal system with P2 1/ n space group. The crystal data are as follows: a = 12.978(8), b = 12.685(8), c = 14.905(9) Å, β = 105.333(7)°, and V = 2366(2) Å 3. In I, there are two types of EnH 2 2+ anions. They connect to [Ho III(Ttha)] 3? by hydrogen bonds leading to the formation of 3D pore structure along z axis. In II, EnH 2 2+ cation connects three adjacent [Ho III(Egta)(H 2O)] ? complex anions through hydrogen bonds, these hydrogen bonds lead to the formation of 2D network structure in [101] plane. The results showed that ligand structures play a crucial role in crystal and molecular structure of their complexes. In addition, the protonated (EnH 2 2+ ) cations conjugating to [Ho III(Ttha)] 3? and [Ho III(Egta)(H 2O)] ? complex anions are reviewed, which act as an important beginning for study of Ho(III) complexes conjugating with other various amino and heterocyclic biomolecule. 相似文献
19.
[Ni(bpy)(mal)(H 2O) 3]·H 2O and [Ni(4,4′-dmbpy)(mal)(H 2O) 3]·1.5H 2O (mal = maleato; bpy = 2,2′-bipyridine; 4,4′-dmbpy = 4,4′-dimethyl-2,2′-bipyridine) exhibit molecular crystal structures. The Ni(II) central ions in both complexes are six-coordinate by one chelate bonded L–L ligand, three aqua ligands, and one position is occupied by a maleato oxygen donor atom. Hydrogen bonded ribbon-like supramolecular structural motifs are present in both studied complexes; these are linked by weaker C–H?O hydrogen bonds in [Ni(bpy)(mal)(H 2O) 3]·H 2O, whereas in [Ni(4,4′-dmbpy)(mal)(H 2O) 3]·1,5H 2O the hydrogen bonded ribbons are linked by O?H-O-H?O hydrogen bonds with the participation of the additional water solvate molecule positioned on the twofold axis. In both structures, π– π stacking interactions with different patterns in respective structures were found. The role of dispersion energy and many-body effects in the stabilization of bpy and 4,4′-dmbpy stacking interactions were investigated using methods of computational chemistry. Those confirm the dispersion-dominated stabilization of the 4,4′-dmbpy supramolecular chain-like structure, with only marginal impact of cooperativity effects. Thermal decompositions of both complexes start with dehydration. Magnetic susceptibility studies performed from 2 to 300 K revealed a dominant effect of the zero-field splitting of the Ni(II) ion, governing the low-temperature magnetic properties of both compounds. 相似文献
20.
A new complex [Cu(H 2tea)(H 2O)(imi)][Cu(H 3tea)(imi)][Na{Mo 8O 26}] · 4H 2O (H 3tea =triethanolamine, imi = imidazole) has been synthesized in aqueous solution and characterized by elemental analysis, IR spectroscopy, thermal gravimetric analysis, and single-crystal X-ray diffraction. X-ray diffraction reveals that β-[Mo 8O 26] 4? polyanions are linked by sodium ions to form a chain. The coppers are five- and six-coordinate for [Cu(H 3tea)(imi)] 2+ and [Cu(H 2O)(H 2tea)(imi)] +, respectively. Crystal packing is due to hydrogen bonds and π ··· π stacking interactions, giving a 3-D polymeric network. The magnetic properties of the title compound are also presented. 相似文献
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