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1.
The blue copper complex compounds [Cu(phen) 2(C 6H 8O 4)] · 4.5 H 2O ( 1 ) and [(Cu 2(phen) 2Cl 2)(C 6H 8O 4)] · 4 H 2O ( 2 ) were synthesized from CuCl 2, 1,10‐phenanthroline (phen) and adipic acid in CH 3OH/H 2O solutions. [Cu(phen) 2‐ (C 6H 8O 4)] complexes and hydrogen bonded H 2O molecules form the crystal structure of ( 1 ) ( P1 (no. 2), a = 10.086(2) Å, b = 11.470(2) Å, c = 16.523(3) Å, α = 99.80(1)°, β = 115.13(1)°, γ = 115.13(1)°, V = 1617.5(5) Å 3, Z = 2). The Cu atoms are square‐pyramidally coordinated by four N atoms of the phen ligands and one O atom of the adipate anion (d(Cu–O) = 1.989 Å, d(Cu–N) = 2.032–2.040 Å, axial d(Cu–N) = 2.235 Å). π‐π stacking interactions between phen ligands are responsible for the formation of supramolecular assemblies of [Cu(phen) 2(C 6H 8O 4)] complex molecules into 1 D chains along [111]. The crystal structure of ( 2 ) shows polymeric [(Cu 2(phen) 2Cl 2)(C 6H 8O 4) 2/2] chains ( P1 (no. 2), a = 7.013(1) Å, b = 10.376(1) Å, c = 11.372(3) Å, α = 73.64(1)°, β = 78.15(2)°, γ = 81.44(1)°, V = 773.5(2) Å 3, Z = 1). The Cu atoms are fivefold coordinated by two Cl atoms, two N atoms of phen ligands and one O atom of the adipate anion, forming [CuCl 2N 2O] square pyramids with an axial Cl atom (d(Cu–O) = 1.958 Å, d(Cu–N) = 2.017–2.033 Å, d(Cu–Cl) = 2.281 Å; axial d(Cu–Cl) = 2.724 Å). Two square pyramids are condensed via the common Cl–Cl edge to centrosymmetric [Cu 2Cl 2N 4O 2] dimers, which are connected via the adipate anions to form the [(Cu 2(phen) 2Cl 2)(C 6H 8O 4) 2/2] chains. The supramolecular 3 D network results from π‐π stacking interactions between the chains. H 2O molecules are located in tunnels. 相似文献
2.
Synthesis of Copper and Silver Complexes with Pentadentate N,S and Hexadentate N,O Chelate Ligands – Characterization and Crystal Structures of {Cu 2[C 6H 4(SO 2)NC(O)] 2(C 5H 5N) 4}, {Cu 2[C 5H 3N(CHNC 6H 4SCH 3) 2] 2}(PF 6) 2, and {Ag[C 5H 3N(CHNC 6H 4SCH 3) 2]}PO 2F 2 In the course of the reaction of copper(II)-acetate monohydrate with 2,2′-bisbenzo[d][1,3]thiazolidyl in methanol the organic component is transformed to N,N′-bis-(2-thiophenyl)ethanediimine and subsequently oxidized to the N,N′-bis-(2-benzenesulfonyl)ethanediaciddiamide H 4BBSED, which coordinates in its deprotonated form two Cu 2+ ions. Crystallisation from pyridine/n-hexane yields [Cu 2(BBSED)(py) 4] · MeOH. It forms triclinic crystals with the space group P1 and a = 995.5(2) pm, b = 1076.1(3) pm, c = 1120.7(2) pm, α = 104.17(1)°, β = 105.28(1)°, γ = 113.10(1)° and Z = 1. In the centrosymmetrical dinuclear complex the copper ions are coordinated in a square-pyramidal arrangement by three nitrogen and two oxygen atoms. The Jahn-Teller effect causes an elongation of the axial bond by approximately 30 pm. The reactions of the pentadentate ligand 2,6-Bis-[(2- methylthiophenyl)-2-azaethenyl]pyridine BMTEP with salts of copper(I), copper(II) and silver(I) yield the complexes [CU 2(BMTEP) 2](PF 6) 2, [Cu(BMTEP)]X 2 (X = BF, C1O) and [Ag(BMTEP)]X (X = PO 2F, ClO). [Cu 2(BMTEP) 2](PF 6) 2 crystallizes from acetone/diisopropyl- ether in form of monoclinic crystals with the space group C2/ c, and a = 1833.2(3) pm, b = 2267.30(14) pm, c = 1323.5(2) pm, β= 118.286(5)°, and 2 = 4. In the dinuclear complex cation with the symmetry C 2 the copper ions are tetrahedrally coordinated by two bridging BMTEP ligands. The Cu? Cu distance of 278.3pm can be interpreted with weak Cu? Cu interactions which also manifest itself in a temperature independent paramagnetism of 0.45 B.M. The monomeric silver complex [Ag(BMTEP)]PO 2F 2 crystallizes from acetone/thf in the triclinic space group P1 with a = 768.7(3) pm, b = 1074.0(5) pm, c = 1356.8(5) pm, α = 99.52(2)°, β = 96.83(2)°, γ = 99.83(2)° and Z = 2. The central silver ion is coordinated by one sulfur and three nitrogen atoms of the ligand in a planar, semicircular arrangement. The bond lengths Ag? N = 240.4–261.7 and Ag? S = 257.2 pm are significantly elongated in comparison with single bonds. 相似文献
3.
The ionic title complex, bis(μ‐ethylene glycol)‐κ 3O, O′: O′;κ 3O: O, O′‐bis[(ethylene glycol‐κ 2O, O′)(ethylene glycol‐κ O)sodium] bis(ethylene glycolato‐κ 2O, O′)copper(II), [Na 2(C 2H 6O 2) 6][Cu(C 2H 4O 2) 2], was obtained from a basic solution of CuCl 2 in ethylene glycol and consists of discrete ions interconnected by O—H...O hydrogen bonds. This is the first example of a disodium–ethylene glycol complex cation cluster. The cation lies about an inversion center and the Cu II atom of the anion lies on another independent inversion center. 相似文献
4.
A novel organically templated copper pentaborate, [Cu(C 3N 2H 4) 4][Cu(CH 3COO) 2(C 3N 2H 4) 2(H 2O) 2]‐ [B 5O 6(OH) 4] 2, was synthesized by hydrothermal reaction and characterized by elemental analysis, single‐crystal X‐ray diffraction, FT‐IR spectroscopy, Raman spectroscopy and TGA. The crystal structure of this compound consists of two copper‐centered polyhedra and two discrete [B 5O 6(OH) 4] ? pentaborate anions, which are linked together through intensive hydrogen bonding interactions, forming a 3D framework with large channels along c axis. The discrete pentaborate anions form infinite layers by hydrogen bonds. Moreover, the two crystallographically different octahedral coppers are connected by common oxygen atom to form an infinite chain. 相似文献
5.
The title complexes, catena‐poly[[aqua(1,10‐phenanthroline‐κ 2N, N′)cobalt(II)]‐μ‐benzene‐1,4‐dicarboxylato‐κ 2O1: O4], [Co(C 8H 4O 4)(C 12H 8N 2)(H 2O)], (I), and catena‐poly[[[(di‐2‐pyridyl‐κ N‐amine)copper(II)]‐μ‐benzene‐1,4‐dicarboxylato‐κ 4O1, O1′: O4, O4′] hydrate], [Cu(C 8H 4O 4)(C 10H 9N 3)]·H 2O, (II), take the form of zigzag chains, with the 1,4‐benzenedicarboxylate ion acting as an amphimonodentate ligand in (I) and a bis‐bidentate ligand in (II). The Co II ion in (I) is five‐coordinate and has a distorted trigonal–bipyramidal geometry. The Cu II ion in (II) is in a very distorted octahedral 4+2 environment, with the octahedron elongated along the trans O—Cu—O bonds and with a trans O—Cu—O angle of only 137.22 (8)°. 相似文献
6.
Triclinic single crystals of [(C 6H 10)(NH 3) 2][Ni(H 2O) 4C 6H 2(COO) 4]·4H 2O have been prepared in aqueous solution at 55 °C. Space group (Nr. 2), a = 691.23(6), b = 924.84(5), c = 1082.43(7) pm, α = 74.208(6)°, β = 75.558(7)°, γ = 68.251(6)°, V = 0.60985(7) nm 3, Z = 1. The Nickel(II) species, located on a crystallographic inversion centre, is coordinated in a trans‐octahedral fashion by two oxygen atoms stemming from the centrosymmetric pyromellitate anions and four from water molecules (Ni–O 205.82(12) – 208.11(13) pm). The connection between Ni 2+ and [C 6H 2(COO) 4)] 4? leads to infinite chain‐like polyanions extending parallel to with {Ni(H 2O) 4[C 6H 2(COO) 4] 2?} n composition. [(C 6H 10)(NH 3) 2] 2+‐cations are accomodated between the chains, compensating for the negative charge of the polyanions. Thermogravimetric analysis in air showed that the loss of water of crystallisation occurs in two steps between 102 and 206 °C, corresponding to the loss of 6 and 2 water molecules per formula unit, respectively. The dehydrated sample was stable between 206 and 353 °C. Further decomposition yielded nickel(II) oxide (NiO). 相似文献
7.
Synthesis and Crystal Structure of the Nitrido Complexes [( n‐Bu) 4N] 2[{(L)Cl 4Re≡N} 2PtCl 2] (L = THF und H 2O) and [( n‐Bu) 4N] 2[(H 2O)Cl 4Re≡N‐PtCl(μ‐Cl)] 2 The threenuclear complex [( n‐Bu) 4N] 2[{(THF)Cl 4Re≡N} 2—PtCl 2] ( 1a ) is obtained by the reaction of [( n‐Bu) 4N][ReNCl 4] with [PtCl 2(C 6H 5CN) 2] in THF/CH 2Cl 2. It forms red crystals with the composition 1a · 2 CH 2Cl 2 crystallizing in the tetragonal space group I4 1/a with a = 3186.7(2); c = 1311.2(1) pm and Z = 8. If the reaction of the educts is carried out without THF, however under exposure to air the compound [( n‐Bu) 4N] 2[{(H 2O)Cl 4Re≡N} 2PtCl 2] ( 1b ) is obtained as red trigonal crystals with the space group R3 and a = 3628.3(3), c = 1231.4(1) pm and Z = 9. In the centrosymmetric complex anions [{(L)Cl 4Re≡N} 2PtCl 2] 2— a linear PtCl 2moiety is connected in a trans arrangement with two complex fragments [(L)Cl 4Re≡N] — via asymmetric nitrido bridges Re≡dqN‐Pt. For Pt II such results a square‐planar coordination PtCl 2N 2. The linear nitrido bridges are characterized by distances Re‐N = 169.5 pm and Pt‐N = 188.8 pm ( 1a ), respectively, Re‐N = 165.6 pm and Pt‐N = 194.1 pm ( 1b ). By the reaction of [( n‐Bu) 4N][ReNCl 4] with PtCl 4 in CH 2Cl 2 platinum is reduced forming the heterometallic Re VI/Pt II complex, [( n‐Bu) 4N] 2[(H 2O)Cl 4Re≡N‐PtCl(μ‐Cl)] 2 ( 2 ). It crystallizes in the monoclinic space group C2/c with a = 2012.9(1); b = 1109.0(2); c = 2687.4(4) pm; β = 111.65(1)° and Z = 4. In the central unit ClPt(μ‐Cl) 2PtCl of the anionic complex [(H 2O)Cl 4Re≡N‐PtCl(μ‐Cl)] 22— with the symmetry C 2 the coordination of the Pt atoms is completed by two nitrido bridges Re≡N‐Pt to nitrido complex fragments [(H 2O)Cl 4Re≡N] — forming a square‐planar arrangement for the Pt atoms. The distances in the linear nitrido bridges are Re‐N = 165.9 pm and Pt‐N = 190.1 pm. 相似文献
8.
2-[(2-Hydroxyphenylimino)methyl]phenol (H 2L 1) and 1-[(2-hydroxyphenylimino)methyl]naphthalen-2-ol (H 2L 2) reacted with copper(II) acetate hydrate and sulfanilamide (Sf 1), sulfathiazole (Sf 2), sulfaethidole (Sf 3), sulfadiazine (Sf 4), and sulfadimidine (Sf 5) in ethanol to give mixed-ligand copper chelates with the composition Cu(Sf 1–5)(L 1–2) · n H 2O ( n = 1, 2). All these complexes are monomeric. Salicylaldehyde imines (H 2L 1 and H 2L 2) behave as doubly deprotonated tridentate O,N,O ligands, whereas sulfanilamides (Sf 1–5) are unidentate ligands. Thermolysis of the synthesized complexes includes dehydration at 70–90°C, followed by complete thermal
decomposition (290–380°C). The complexes [Cu(Sf 1)(L 1)] · 2H 2O and [Cu(Sf 3)(L 1)] · H 2O at a concentration of 10 −4 M inhibited growth and reproduction of 100% of human myeloid leukemia cells (HL-60). The inhibitory effect was 90 and 75%,
respectively, at a concentration of 10 −5 M, whereas no antitumor activity was observed at a concentration of 10 −6 M. 相似文献
9.
Synthesis and X-ray structure analysis of host-guest complexes [(H4L)(SiF6)2-4H2O] (I) and [(H4L)(GeF6)2-4H2O] (II) are reported (L = meso-5,7,7,12,12,14-hexamethyl-l,4,8,11-tetraazacyclo-tetradecane). The crystals of both compounds are triclinic with close unit cell parameters. I: a = 9.576(3), b= 9.217(3), c= 8.334(2) å, α= 105.66(2), Ω= 83.68(2), α = 105.38(2)? II: a= 9.627(3), b = 9.358(3), c.= 8.497(4) A, a= 106.02(2), Ω = 83.74(2), α= 106.06(2)?. The structural units of the crystals are the (H4L)4+ cations, the hexafluorosilicate (or hexafluowgemanate) anions, and the water molecules linked by a system of H bonds. The macrocycle in the complexes has C1 symmetry. In the inorganic anions, the silicon as well as germanium atom is surrounded by an octahedron of six fluorine atoms. 相似文献
10.
The Layered Structure of Cu 2(H 2O) 4[C 4H 4N 2][C 6H 2(COO) 4]·2H 2O Triclinic single crystals of Cu 2(H 2O) 4[C 4H 4N 2][C 6H 2(COO) 4]·2H 2O have been grown in an aqueous silica gel. Space group (Nr. 2), a = 723.94(7) pm, b = 813.38(14) pm, c = 931.0(2) pm, α = 74.24(2)°, β = 79.24(2)°, γ = 65.451(10)°, V = 0.47819(14) nm 3, Z = 1. Cu 2+ is coordinated in a distorted, octahedral manner by two water molecules, three oxygen atoms of the pyromellitate anions and one nitrogen atom of pyrazine (Cu—O 194.1(2)–229.3(3) pm; Cu–N 202.0(2) pm). The connection of Cu 2+ and [C 6H 2(COO) 4)] 4? yields infinite strands, which are linked by pyrazine molecules to form a two‐dimensional coordination polymer. Thermogravimetric analysis in air showed that the dehydrated compound was stable between 175 and 248 °C. Further heating yielded CuO. 相似文献
11.
Reaction of CuCl 2 · 2H 2O, phenanthroline, maleic acid and NaOH in CH 3OH/H 2O (1:1 v/v) at pH = 7.0 yielded blue {[Cu(phen)] 2(C 4H 2O 4) 2} · 4.5H 2O, which crystallizes in the monoclinic space group C2/ c (no. 15) with cell dimensions: a = 18.127(2)Å, b = 12.482(2)Å, c = 14.602(2)Å, β = 103.43(1)°, U = 3213.5(8)Å 3, Z = 4. The crystal structure consists of the centrosymmetric dinuclear {[Cu(phen)] 2(C 4H 2O 4) 2} complex molecules and hydrogen bonded H 2O molecules. The Cu atoms are each square‐pyramidally coordinated by two N atoms of one phen ligand and three carboxyl O atoms of two maleato ligands with one carboxyl O atom at the apical position (d(Cu‐N) = 2.008, 2.012Å, equatorial d(Cu‐O) = 1.933, 1.969Å, axial d(Cu‐O) = 2.306Å). Two square‐pyramids are condensed via two apical carboxyl O atoms with a relatively larger Cu···Cu separation of 3.346(1)Å. The dinuclear complex molecules are assembled via the intermolecular π—π stacking interactions into 1D ribbons. Crossover of the resulting ribbons via interribbon π—π stacking interactions forms a 3D network with the tunnels occupied by H 2O molecules. The title complex behaves paramagnetically between 5—300 K, following the Curie‐Weiss law χm(T—θ) = 0.435 cm 3 · mol —1 · K with θ = 1.59 K. 相似文献
12.
Alkylxanthate complexes of the general formula [M{S(S)COR} 2] (M = Ni, 63Cu, and 65Cu; R = C 2H 5, i-C 3H 7, i-C 4H 9, s-C 4H 9, and C 5H 11) were synthesized and studied by EPR and high-resolution solid-state 13C CP/MAS NMR. In the copper(II) complexes stabilized in the matrix of nickel(II) compounds, square planar chromophores [CuS 4] are characterized by rhombic distortion (EPR data). Experimental EPR spectra were simulated at the second order of perturbation theory. Nickel(II) complexes were characterized by 13C NMR spectra. In all cases, the –OC(S)S– groups were found to exhibit intramolecular structural equivalence. 相似文献
13.
Synthesis and Structure of Copper(I)Chalcogenolate-2,2′-Bipyridine Complexes [CuS(2,4,6- iPr 3C 6H 2)] 4(Bipy) 2 and [CuSe(2,4,6- iPr 3C 6H 2)] 2(Bipy) 2 The oligomeric homoleptical copper(I) chalcogenolate compounds [CuS(2,4,6- iPr 3C 6H 2)] x=4,8 and [CuSe(2,4,6- iPr 3C 6H 2)] 6 react with 2,2′-bipyridine (Bipy) to yield the tetranuclear complex [CuS(2,4,6- iPr 3C 6H 2)] 4(Bipy) 2 ( 4 ) and the dinuclear complex [CuSe(2,4,6- iPr 3C 6H 2)] 2(Bipy) 2 ( 5 ). The structures of 4 and 5 were determined by X-ray analysis. In the eight-membered Cu 4S 4 core of 4 with chair conformation the copper atoms are linked by μ 2-bridging selenolate ligands. Only two copper atoms are coordinated by 2,2′bipyridine. The corresponding copper(I) selenolate complex ( 5 ) forms a folded four-membered Cu 2Se 2 ring with μ 2-bridging selenolate ligands. The Cu? Cu distance of 2.52 Å is relatively short. In contrast to the reaction performed with 2,2′-bipyridine, addition of phenantroline to 1 respectively 2 yields a dinuclear complex [CuS(2,4,6- iPr 3C 6H 2)] 2(Phen) 2 ( 10 ). NMR spectroskopic and cryoscopic measurement of 4 show that this complex dissociates into smaller fragments in solution which undergo rapid exchange reactions. However, corresponding investigations performed on 5 indicate that the solid state structure is maintained in solution. The electrochemical behaviour of 4, 5 and 10 was studied in CH 2Cl 2 and in any case no reversible redox processes could be observed. 相似文献
14.
Single crystals of [(C 5H 4NH)NC 4H 8NH(C 3H 5)] 2+[Cu 3Cl 5] 2? are obtained by ac synthesis in ethanol from 1-(2-pyridyl)-4-allyl-piperazinium and Cu(II) dichlorides and their structure is studied by X-ray diffraction analysis (space group P-1, a = 7.246(7) Å, b = 8.54(1) Å, c = 16.41(1) Å, α = 70.76(8)°, β = 77.24(8)°, λ = 80.42(9)°, V = 30(4) Å 3, Z = 2, R( F) = 0.0686. In the structure of this π-complex, the Cu and Cl atoms form unusual centrosymmetrical Cu 6Cl 10 fragments, each fragment being bonded to two 1-(2-pyridyl)-4-allyl-piper-azinium cations via π-interaction Cu-(C=C). A three-dimensional structure is formed by means of N-H…Cl hydrogen bonds. The trigonal-pyramidal surrounding of the Cu(1) atom includes three Cl atoms and the C=C bond, while the tetrahedral surrounding of Cu(2) and the trigonal surrounding of Cu(3) involve the Cl atoms only. 相似文献
15.
The title compound, [Cu 2(C 7H 5O 2) 4(C 7H 10N 2) 2], is a crystallographically centrosymmetric binuclear complex, with Cu atoms [Cu...Cu = 2.6982 (4) Å] bridged by four benzoate ligands. Each of the Cu atoms in this bunuclear copper(II) acetate hydrate analogue is present in an approximately square‐pyramidal environment, with four O atoms in a plane and the pyridine N atom at the apical site. Selected geometric parameters are compared with values for related tetrabenzoate complexes of copper(II). 相似文献
16.
Oxidation of [(p-CH 3C 6H 4NC) 4Rh][PF 6] with one half mole of iodine or bromine produces [(p-CR 3C 6R 4NC) 8Rh 2X 2][PF 6] 2. The crystal structure of the iodide complex establishes the existence of a direct RhRh bond (2.785 Å) with pseudooctahedral coordination about each rhodium completed by terminal isocyanide and iodide ligands. 相似文献
17.
Metal Sulfur Nitrogen Compounds 18. Reaction Products of S 7NH with Nickel and Copper Salts. Preparation and Structures of the Complexes [Ch 34N][Ni(S 3N)(CN) 2], [(C 6H 5) 4As][Cu(S 3N) 2], and [(C 6H 5) 4AS][Cu(S 3N)Cl]. In the presence of MOH (M = K, [(CH 3) 4N]), S 7NH reacts with Ni(CN) 2 to yield, besides the three-nuclear complex M[(S 3NNi) 3S 2], the new mononuclear complex M[Ni(S 3N)(CN) 2]. The [(CH 3) 4N] + salt is monoclinic, C2/m, a = 19.303(9), b =6.941(3), c=16.309(10) Å, β = 144.51 0(2), Z = 4. The [Ni(S 3N)(CN) 2]- anion is planar, Ni being coordinated by one S 3N ? chelate ligand and by two CN ? ions. From the reaction of CuCI 2, S 7NH, and [Ph 4As]OH result the salts [Ph 4As][Cu(S 3N) 2] or [Ph 4As][Cu(S 3N)Cl], depending on the reaction conditions. [Ph 4As][Cu(S 3N) 2] is triclinic, P&1macr;, a = 7.073(3), b = 11.742(4), c = 16.439(6) Å α = 91.08°(3), β = 99.01°(3), γ = 91.58°(3), Z = 2. Two S 3N ? chelate ligands coordinate to Cu I in a distorted tetrahedral arrangement. [Ph 4As][Cu(S 3N)Cl] is monoclinic, C2/c, a = 17.174(6), b = 13.650(5), c = 21.783(5) Å β = 100.45°(2), Z = 8. Cu I is coordinated by one S 3N ? chelate ligand and one C1 ?, resulting in a trigonal planar environment. 相似文献
18.
The structure of the title compound, poly[(dihydrogenphosphato‐κ O)(μ 3‐hydrogenphosphato)di‐μ‐oxido‐(1,10‐phenanthroline)copper(II)vanadium(V)], [CuV(HPO 4)(H 2PO 4)O 2(C 12H 8N 2)] n, is defined by [(phen)Cu–μ‐(κ 2O: O′‐VP 2O 10H 3) 2–Cu(phen)] units (phen is 1,10‐phenanthroline), which are connected to neighbouring units through vanadyl bridges. Neighbouring chains have no covalent bonds between them, although they interdigitate through the phen groups viaπ–π interactions. 相似文献
19.
Rubidium chromium(III) dioxalate dihydrate [diaquabis(μ‐oxalato)chromium(III)rubidium(I)], [RbCr(C 2O 4) 2(H 2O) 2], (I), and dicaesium magnesium dioxalate tetrahydrate [tetraaquabis(μ‐oxalato)magnesium(II)dicaesium(I)], [Cs 2Mg(C 2O 4) 2(H 2O) 4], (II), have layered structures which are new among double‐metal oxalates. In (I), the Rb and Cr atoms lie on sites with imposed 2/ m symmetry and the unique water molecule lies on a mirror plane; in (II), the Mg atom lies on a twofold axis. The two non‐equivalent Cr and Mg atoms both show octahedral coordination, with a mean Cr—O distance of 1.966 Å and a mean Mg—O distance of 2.066 Å. Dirubidium copper(II) dioxalate dihydrate [diaquabis(μ‐oxalato)copper(II)dirubidium(I)], [Rb 2Cu(C 2O 4) 2(H 2O) 2], (III), is also layered and is isotypic with the previously described K 2‐ and (NH 4) 2Cu II(C 2O 4) 2·2H 2O compounds. The two non‐equivalent Cu atoms lie on inversion centres and are both (4+2)‐coordinated. Hydrogen bonds are medium‐strong to weak in the three compounds. The oxalate groups are slightly non‐planar only in the Cs–Mg compound, (II), and are more distinctly non‐planar in the K–Cu compound, (III). 相似文献
20.
The crystal structures of two (hexafluoroacetylacetonato)copper(II) complexes with 3-imidazoline nitroxide radicals, [Cu(C 5HF 6O 2) 2] 3 (C 14H 19N 2O) 2 (I) and [Cu(C 5HF 6O 2) 2] 3 (C 13H 17N 2O 3) 2 (II), have been determined. The compounds are triclinic (PI, Z=1) with a=8.730(2), b=10.357(2), c=21.996(5) Å, α=103.24(2), β=94.03(2), γ=95.04(2) 0, V=1920(1) Å 3 for I and a=8.679(2), b=14.769(4), c=15.368(4) Å, α=85.58(2), β=96.25(1), γ=104.60(1) 0, V=1893(1) Å 3 for II. Complexes I and II are molecular. The trinuclear molecules are centrosymmetric relative to the Cu(1) atom. The coordination polyhedron of Cu(1) is a square bipyramid formed by the O atoms of the hfac anions and nitroxide radicals (average Cu?O hfac 1.92(1) for I and 1.93(1) Å for II; Cu?O N?O 2.47(1) for I and 2.56(1) Å for II). The coordination polyhedron of Cu(2) is a trigonal bipyramid formed by the O atoms of the hfac anions (Cu?O hfac 1.91(1)–2.12(1) for I and 1.91(1)–2.09(1) Å for II) and an imine N atom of the radical (Cu(2)?N(2) 2.00(1) for I and 2.03(1) Å for II). The molecules are linked by van der Waals forces. 相似文献
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