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1.
《Journal of Coordination Chemistry》2012,65(18):3265-3272
Three new centrosymmetric dinuclear copper(II) complexes, [Cu2Cl2(L1)2] (1), [Cu2(μ 1,3-NCS)2(L2)2] (2), and [Cu2(μ 1,1-N3)2(L3)2] (3), where L1, L2, and L3 are the deprotonated forms of the Schiff bases 1-[(2-propylaminoethylimino)methyl]naphthalen-2-ol (HL1), 1-[(3-methylaminopropylimino)methyl]naphthalen-2-ol (HL2), and 2-[(2-isopropylaminoethylimino)methyl]phenol (HL3), respectively, have been prepared and characterized by elemental analysis, IR spectra, and single-crystal X-ray crystallography. Each Cu is coordinated by the three donors of the Schiff bases and by two bridging groups, forming a square-pyramidal geometry. 相似文献
2.
Two similar tetranuclear copper(II) complexes with the formulae [Cu4(L1)2(μ1,1-N3)4(μ2-CH3COO)2] and [Cu4(L2)2(μ1,1-N3)2(μ-Br)2Br2(CH3OH)2], where L1 and L2 are the deprotonated forms of 2-[(2-ethylaminoethylimino)methyl]-5-methoxyphenol and 5-methoxy-2-[(2-piperidin-1-ylethylimino)methyl]phenol,
respectively, have been synthesized and characterized by spectroscopic methods and single-crystal X-ray diffraction. Both
complexes are centrosymmetric tetranuclear copper(II) compounds. The bridging groups in [Cu4(L1)2(μ1,1-N3)4(μ2-CH3COO)2] are μ1,1-azide ligands and μ2-acetate ligands, and those in [Cu4(L2)2(μ1,1-N3)2(μ-Br)2Br2(CH3OH)2] are μ1,1-azide ligands and μ-bromide ligands. Each Cu atom in the complexes is in a square pyramidal geometry. 相似文献
3.
S. Karthikeyan T. M. Rajendiran R. Kannappan R. Mahalakshmy R. Venkatesan P. Sambasiva Rao 《Journal of Chemical Sciences》2001,113(4):245-256
Preparation of the ligands HL1 = 2,6-[(N-phenylpiperazin-1-yl)methyl]-p-ethylphenol; HL2 = 2,6-[(N-phenylpiperazin-1-yl)methyl]-p-methoxyphenol and HL3 = 2,6-[(N-phenylpiperazin-1-yl)methyl]-p-nitrophenol are described together with their Cu(II) complexes with different bridging units. The exogenous bridges incorporated
into the complexes are: hydroxo [Cu2L(OH)(H2O)2](ClO4)2.H2O (L1=1a, L2 =1b, L3 =1c), acetato [Cu2L(OAc)2]ClO4.H2O (L1 =2a, L2 =2b, L3 =2c) and nitrito [Cu2L1(NO2)2(H2O)2]ClO4.H2O (L1=3a, L2 =3b, L3 =3c). Complexes1a,1b,1c and2a,2b,2c contain bridging exogenous groups, while3a,3b,3c possess only open μ-phenolate structures. Both the ligands and complexes were characterized by spectral studies. Cyclic voltammetric
investigation of these complexes revealed that the reaction process involves two successive quasireversible one-electron steps
at different potentials. The first reduction potential is sensitive to electronic effects of the substituents at the aromatic
ring of the ligand system, shifting to positive potentials when the substituents are replaced by more electrophilic groups.
EPR studies indicate very weak interaction between the two copper atoms. Various covalency parameters have been calculated. 相似文献
4.
《Journal of Coordination Chemistry》2012,65(23):4080-4092
Four copper(II) complexes and one copper(I) complex with pyridine-containing pyridylalkylamide ligands N-(pyridin-2-ylmethyl)pyrazine-2-carboxamide (HLpz) and N-(2-(pyridin-2-yl)ethyl)pyrazine-2-carboxamide (HLpz?) were synthesized and characterized. The X-ray crystal structures of [Cu2(Lpz)2(4,4?-bipy)(OTf)2] (1, OTf?=?trifluoromethanesulfonate, 4,4?-bipy?=?4,4?-bipyridine) and [Cu(Lpz)(py)2]OTf·H2O (2, py?=?pyridine) revealed binuclear and mononuclear molecular species, respectively, while [Cu(Lpz)(μ2-1,1-N3)]n (3), [Cu(Lpz?)(μ2-1,3-N3)]n (4), and [Cu(HLpz)Cl]n (5) are coordination polymer 1-D chains in the solid state. 相似文献
5.
Shao-Song Qian Yue Zhao Miao-Miao Zhen Cheng-Lu Zhang Zhong-Lu You Hai-Liang Zhu 《Transition Metal Chemistry》2013,38(1):63-68
Two cubane-type tetranuclear nickel(II) and copper(II) complexes, [Ni4(L1)4(CH3OH)4] (1) and [Cu4(L2)4]·H2O (2), where L1 and L2 are the dianionic forms of the tridentate Schiff bases 4-nitro-2-[(2-hydroxyethylimino)methyl]phenol (H2L1) and 5-methoxy-2-[(2-hydroxyethylimino)methyl]phenol (H2L2), respectively, have been synthesized and characterized by physicochemical methods and single-crystal X-ray diffraction. The magnetic properties of the complexes show the presence of ferromagnetic interactions for complex 1 and antiferromagnetic interactions for complex 2, mediated by hydroxyl bridges. 相似文献
6.
Altering the Activity of Catechol Oxidase Model Compounds by Electronic Influence on the Copper Core
The catecholase activity of the dicopper(II) complexes [Cu2(L1)(μ‐OCH3)(NCCH3)2](PF6)2·H2O·CH3CN ( 1 ), [Cu2(L2)(μ‐OH)(MeOH)(NCCH3)](BF4)2 ( 2 ), [Cu2(L3)(μ‐OMe)(NCCH3)2](BF4)2·2CH3CN·H2O ( 3 ), [Cu2(L2)(μ‐OAc)2]BF4·H2O ( 4 ), [Cu2(L4)(μ‐OAc)2]ClO4 ( 5 ) and [Cu2(L5)(μ‐OMe)(NCCH3)3(OH2)](ClO4)2·2CH3OH·CH3CN ( 6 ) consisting of varying para‐substituted phenol ligands HL1 = 4‐trifluoromethyl‐2,6‐bis((4‐methylpiperazin‐1‐yl)methyl)phenol, HL2 = 4‐bromo‐2,6‐bis((4‐methyl‐1,4‐diazepan‐1‐yl)methyl)phenol, HL3 = 4‐bromo‐2‐((4‐methyl‐1,4‐diazepan‐1‐yl)methyl)‐6‐((4‐methylpiperazin‐1‐yl)methyl)phenol, HL4 = 2,6‐bis((4‐methylpiperazin‐1‐yl)methyl)‐4‐nitrophenol and HL5 = 4‐tert‐butyl‐2,6‐bis((4‐methylpiperazin‐1‐yl)methyl)phenol was studied. The main difference within the six complexes lies in the individual copper–copper separation that is enforced by the chelating side arms of the phenolate ligand entity and more importantly in the exogenous bridging solvent, hydroxide, methanolate or acetate ions. The distance between the copper cores varies from 2.94Å in 1 to 3.29Å in 5 . The catalytic activity of the complexes 1 – 6 towards the oxidation of 3,5‐di‐tert‐butylcatechol was determined spectrophotometrically by monitoring the increase of the 3,5–di‐tert‐butylquinone characteristic absorption band at about 400 nm over time saturated with O2. The complexes are able to oxidize the substrate 3,5‐di‐tert‐butylcatechol to the corresponding o‐quinone with distinct catalytic activity (kcat between 92 h?1 and 189 h?1), with an order of decreasing activity 6 > 5 > 1 , 2 , 4 ≥ 3 . A kinetic treatment of the data based on the Michaelis‐Menten approach was applied. A correlation of the catecholase activities with the variation of the para‐ substituents as well as other effects resulting from the copper core distances is discussed. [Cu2(L5)(μ‐OMe)(NCCH3)3(OH)2](ClO4)2·2CH3OH·CH3CN ( 6 ) exhibited the highest activity of the six complexes as a result of its high turnover rate. 相似文献
7.
A new polymer azido-bridged copper(II) complex [Cu4(En)2(μ1,1-N3)4(μ1,1,1-N3)2(μ1,3-N3)2]
n
(I) (En = ethylenediamine) has been synthesized and crystallography characterized. Complex I shows one-dimensional coordination polymeric structure based on a tetranuclear cluster unit [Cu4(En)2(μ1,1-N3)4(μ1,1,1-N3)2(μ1,3-N3)2], in which the azido ions display three different bridging modes. 相似文献
8.
M. O. Talismanova A. A. Sidorov G. G. Aleksandrov V. N. Charushin S. K. Kotovskaya V. P. Ananikov I. L. Eremenko I. I. Moiseeva 《Russian Chemical Bulletin》2008,57(1):47-55
The reactions of palladium(II) salts with 2-mercaptobenzimidazole (HL) and its 5,6-difluorinated derivative (HLF) were investigated. In the presence of hydrochloric acid, PdCl2 and K2PdCl4 react with HL and HLF in the ethanol—water and acetonitrile—water systems to form the mono-nuclear dicationic complexes [Pd(HL)4]Cl2 (1) and [Pd(LF)4]Cl2 (2). In the absence of HCl, the reactions afford the tetranuclear complex Pd4[(L)2(μ3-S,N-(L))2(μS,N-(L))4] (3). The reaction of triethylamine with an ethanolic solution of 3 leads to degradation of 3 and the formation of the lantern-type dinuclear complex Pd2[(μ2-(L)4] (4), in which the palladium atoms are in the nonequivalent coordination environment, PdN4 and PdS4. The reaction of K2PdCl4 with HL or HLF in the THF—water or acetonitrile—water systems (for the reaction with HLF) in the presence of Et3N produces the lantern-type dinuclear complexes Pd2[(μS,N′-(L3))4] and Pd2[(μ-S,N′-(LF))4] (5), in which the metal atoms are in the equivalent coordination environment (cis-PdN2S2).
Dedicated to Academician G. A. Tolstikov on the occasion of his 75th birthday.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 1, pp. 45–52, January, 2008. 相似文献
9.
A. P. Gulya Yu. M. Chumakov V. I. Tsapko V. O. Graur K. S. Lozan-Tyrshu E. Janno B. Ya. Antosyak V. F. Rudik 《Russian Journal of General Chemistry》2011,81(9):1859-1866
Salicylic, 5-chloro-5-bromo-5-nitro-, 3-methoxysalicylic, 2-hydroxy-1-naphthoic aldehydes and 2,3-, 2,4-, and 2,5-dihydroxybenzaldehyde
were shown to react in ethanol with 2-(2-aminoethylamino)ethanol in the presence of copper acetate hydrate forming coordination
compounds Cu(L1-9)CH3COO {HL1-8, 2-([2-(2-hydroxyethylamino)ethylimino]methyl}phenol (HL1) and respective chloro(HL2), bromo- (HL3), nitro- (HL4), methoxy- (HL8), or hydroxy-substituted (HL5-7); HL9, 2-{[2-(2-hydroxyethylamine)ethylimino] methylnaphthol)}. Structure of the complex Cu(L3)CH3COO was determined by X-ray diffraction analysis. Coordination polyhedron of its central atom is a distorted tetragonal bipyramid
with (4+1+1) modes of coordinating the copper atom. The bipyramid base is formed by the atoms of phenol oxygen and of azomethine
and imine nitrogen atoms of the ligand (HL3) and the oxygen atom of the acetate ion. Axial apices of the bipyramid are occupied by the alcohol oxygen atoms of the azomethine
(HL3) and the second oxygen atom of the acetate ion. Other complexes are also of monomer structure. Azomethines (HL1-9) behave as monodeprotonated tetradentate O,N,N,O ligands. The thermolysis of substances includes a stage of complete thermal
decomposition (360–530°C). Synthesized complexes show selective antimicrobial activity against a series of standard strains
of Staphylococcus aureus and E. coli at the concentration in the range of 75–300 μg ml−1. 相似文献
10.
Two end-on azido-bridged Co(III) complexes, [Co3(L1)2(μ1,1-N3)4(N3)2(OH2)(OCH2CH3)]·0.5H2O (1) and [Co2(L2)2(μ1,1-N3)2(N3)2] (2), where L1 and L2 are the deprotonated form of 5-methoxy-2-[(2-morpholin-4-ylethylimino)methyl]phenol and 2-ethoxy-6-[(2-isopropylaminoethylimino)methyl]phenol,
respectively, were prepared and structurally characterized by physicochemical and spectroscopic methods and single crystal
X-ray determination. Complex (1) is a trinuclear Co compound, while complex (2) is a centrosymmetric dinuclear Co compound.
In both complexes, the Co atoms are in octahedral coordination. The preliminary biological tests show that the complexes have
excellent antibacterial activity. 相似文献
11.
Zhong-Lu You Mei Zhang Dong-Mei Xian Hai-Hua Li Qian-Feng Weng 《Transition Metal Chemistry》2012,37(3):279-283
The mixed valence manganese(II/IV) complex, [MnIIL2(MeOH)2]·[MnIVL2(OAc)2]·2(MeOH) (1), and the chloride-bridged 1D polymeric manganese(III) complex, [MnIIIL2(μ-Cl)]n (2), where L is the deprotonated form of 2-ethoxy-6-[(2-phenylaminoethylimino)methyl]phenol (HL), have been prepared and structurally
characterized by single-crystal X-ray diffraction analysis and IR spectra. The Mn atoms in both complexes are octahedrally
coordinated. The self-assembly of the complex structures is apparently directed by the anions of the manganese salts. 相似文献
12.
《Journal of Coordination Chemistry》2012,65(13):1113-1122
Naphthaldimines containing N2O2 donor centers react with platinum(II) and (IV) chlorides to give two types of complexes depending on the valence of the platinum ion. For [Pt(II)], the ligand is neutral, [(H2L1)PtCl2]·3H2O (1) and [(H2L3)2Pt2Cl4]·5H2O (3), or monobasic [(HL2)2Pt2Cl2]·2H2O (2) and [(HL4)2Pt]·2H2O (4). These complexes are all diamagnetic having square-planar geometry. For [Pt(IV)], the ligand is dibasic, [(L1)Pt2Cl4(OH)2]·2H2O (5), [(L2)Pt3Cl10]·3H2O (6), [(L3)Pt2Cl4(OH)2]·C2H5OH (7) and [(L4)Pt2Cl6]·H2O (8). The Pt(IV) complexes are diamagnetic and exhibit octahedral configuration around the platinum ion. The complexes were characterized by elemental analysis, UV-Vis and IR spectra, electrical conductivity and thermal analyses (DTA and TGA). The molar conductances in DMF solutions indicate that the complexes are non-ionic. The complexes were tested for their catalytic activities towards cathodic reduction of oxygen. 相似文献
13.
Yanhui Qiao Yating Chen Shuhua Zhang Qiuping Huang Yujie Zhang Guangzhao Li 《Arabian Journal of Chemistry》2021,14(7):103237
A novel 5-Acetoxy-1-(6-chloropyridin-2-yl)-1H-pyrazole-3-carboxylic acid methyl ester derivatives Htcdodtta (1), and it’s five complexes, [Cu2(L1)2]·(CH3CN) (2), [Cu2(L2)1.63(L3)0.37]·(CH3OH)0.5 (3), [Cu2(L3)(L4)]·(C2H5OH)0.5·(CH3OH)0.5 (4), [Cu2(L4)(L5)]·(H2O) (5) and [Cu2(L1)1.18(L2)0.82] (6) have been synthesized. The Htcdodtta, HL1-HL5 were formed in-situ reaction. HL1-HL5 are homologues which possess two chiral carbons. Compounds 1–6 were characterized using single-crystal X-ray diffraction, IR, and elemental analysis. Compounds 2–6 are dinuclear copper complexes. The in vitro cytotoxicities of compounds 1–4 against a variety of cell lines were evaluated by MTT assays. Hela cancer cell apoptosis assay of 1 and 2 were examined by flow cytometry. The cell apoptosis in NP69, A549, Capan-2, Hela, HepG2, and HUVECs cell lines induced by compound 2 was further affirmed by cellular morphology observations. 相似文献
14.
《Journal of Coordination Chemistry》2012,65(22):4032-4051
Ten new complexes, [Cu2(L1)(NO3)2]·2H2O (1), [Cu4(L1)2]·4ClO4·H2O (2), [Cu2(L1)(H2O)2]·(adipate) (3), [Cu6(L1)2(m-bdc)4]·2DMF·5H2O (4), [Cu2(L1)(Hbtc)]·5H2O (5), [Cu2(L1)(H2O)2]·(ntc)·3H2O (6), [Co2(L2)]·[Co(MeOH)4(H2O)2] (7), [Co3(L2)(EtOH)(H2O)] (8), [Ni6(L2)2(H2O)4]·H2O (9) and [Zn4(L2)(OAc)2]·0.5H2O (10), have been synthesized. 1 displays a [Cu2(L1)(NO3)2] monomolecular structure. 2 shows a supramolecular chain including [Cu2L1]2+. In 3, two Cu(II) ions are connected by L1 to form a [Cu2(L1)(H2O)2]2+ cation. In 4, the m-bdc anions bridge Cu(II) ions and L1 anions to form a layer. Both 5 and 6 display 3-D supramolecular structures. 7 consists of both [Co2L2]2? and [Co(MeOH)4(H2O)2]2+ units. 8 and 9 show infinite chain structures. In 10, Zn(II) dimers are linked by L2 to generate a 3-D framework. The magnetic properties for 4 and 8 and the luminescent property for 10 have been studied. 相似文献
15.
Two bidentate Schiff base ligands (HL1 = N‐n‐butyl‐4‐[(E)‐2‐(((2‐aminoethyl)imino)methyl)phenol]‐1,8‐naphthalimide; and HL2 = N‐n‐butyl‐4‐[(E)‐2‐(((2‐aminoethyl)imino)methyl)‐6‐methoxyphenol]‐1,8‐naphthalimide) with their metal complexes [Cu(L1)2] ( 1 ), [Zn(L1)2(Py)]2?H2O ( 2 ) and [Ni(L2)2(DMF)2] ( 3 ) have been synthesized and characterized. Single‐crystal X‐ray structure analysis reveals that complex 1 has a four‐coordinated square geometry, while complex 2 is a five‐coordinated square pyramidal structure and complex 3 is a distorted six‐coordinated octahedral structure. Cyclic voltammograms of 1 indicate an irreversible Cu2+/Cu+ couple. In vitro antioxidant activity assay demonstrates that the ligands and the two complexes 1 and 3 display high scavenging activity against hydroxyl (HO?) and superoxide (O2??) radicals. Moreover, the fluorescence properties of the ligands and complexes 1 – 3 were studied in the solid state. Metal‐mediated enhancement is observed in 2 , whereas metal‐mediated fluorescence quenching occurs with 1 and 3 . 相似文献
16.
《Journal of Coordination Chemistry》2012,65(12):2003-2011
Four dinuclear cadmium(II) complexes, [Cd2(L1)(μ2-Cl)Cl2] (1), [Cd2(L2)(μ2-Cl)Cl2] (2), [Cd2(L3)(μ2-Cl)Cl2] (3), and [Cd2(L4)3ClO4] (4), where HL1 = 4-methyl-2,6-bis(1-(2-piperidinoethyl)iminomethyl)-phenol, HL2 = 4-methyl-2,6-bis(1-(2-pyrrolidinoethyl)iminomethyl)-phenol, HL3 = 4-methyl-2,6-bis(1-(2-morpholinoethyl)iminomethyl)-phenol and HL4 = 4-methyl-2,6-bis(cyclohexylmethyl)iminomethyl)-phenol, were synthesized. They were characterized by elemental analysis, FT-IR, UV–Vis, fluorescence and electronspray ionization mass spectroscopy. Complexes 1 and 4 were also characterized by single crystal X-ray analysis. The cadmiums atoms in 1 are linked by μ2-chloride in a distorted square pyramidal geometry, whereas cadmium atom in 4 is in a distorted octahedral environment. The complexes show emission bands around 500 nm with excitation at 395 nm. 相似文献
17.
《Journal of Coordination Chemistry》2012,65(11):1859-1870
A series of metal complexes of Schiff bases derived from condensation of sulfa-guanidine with 1-benzoylacetone (H2L1), 2-hydroxybenzophenol (H2L2), dibenzoylmethane (H2L3), 5-methylisatine (H2L4), and 1-methylisatine (H2L5) have been synthesized. The complexes are characterized by elemental analysis, molar conductance, magnetic moment measurements, IR, UV–Vis, 1H NMR, and ESR spectra, as well as thermogravimetric analysis. The low molar conductance values indicate the complexes are nonelectrolytes. IR and 1H NMR spectra show that H2L1–H2L5 are coordinated to metal ions by two bidentate centers. Mn(II), Co(II), Ni(II), and Cu(II) complexes display paramagnetic behavior, whereas the Zn(II)-complex was diamagnetic. All studies confirm the formation of an octahedral geometry for [Cu2L1(AcO)2(H2O)6] · 3H2O (1), [Mn2L4(AcO)2(H2O)6] · 2H2O (6), [Ni2L4(AcO)2(H2O)6] · 2H2O (8), a tetrahedral geometry for [Cu2L2(AcO)2(H2O)2] (2), [Cu2(L4)2] (4), [Co2(L4)2] · 2H2O (7) and [ZnHL4(AcO)(H2O)] · 2H2O (9) and a trigonal bipyramid geometry for [Cu2L3(AcO)2(H2O)4] (3) and [Cu2HL5(AcO)3(H2O)3] · H2O (5). H2L4 was most effective on Gram negative, Gram positive bacteria, and fungi (diameters inhibition zone ranged between 10.5–27.5 mm) after 24 and 48 h, respectively. Complex 8 showed moderate antimicrobial activity. Its minimum inhibitory concentration (MIC) against Escherichia coli, Bacillus subtilis, Candida albicans and Aspargllus flavas was 20 mg L–1. The compound proved to be of moderate toxicity and its LD50 was 20 mg L–1. 相似文献
18.
A novel copper(II)-azide complex of [Cu2(DMAP)2(μ-1,1-N3)2(μ-1,3-N3)2]n (DMAP = 4-(dimethylamino)pyridine) has been synthesized and characterized by IR spectra, X-ray diffraction, elemental analysis,
and magnetism measurement. The complex reveals a 1D ladder-like chain structure, in which two μ-1,1-N3 and two μ-1,3-N3 bridges form a dimeric unit of [Cu2(DMAP)2(μ-1,1-N3)2(μ-1,3-N3)2] and are then connected to each other from the tail nitrogens of two asymmetric μ-1,3-N3 bridges to generate a chain structure that stacks in the cell to construct the 3D crystal. The Cu atom is five-coordinated
by azide anions to form a distorted square-pyramid of CuN5 (τ = 0.2667). Magnetic susceptibility of complex exhibits a ferromagnetic interaction between the copper(II) ions through
two kinds of azido-bridges.
Electronic supplementary material The online version of this article (doi:) contains supplementary material, which is available to authorized users. 相似文献
19.
《Journal of Coordination Chemistry》2012,65(15):2645-2656
Schiff bases o-vanilidene-1-aminobenzene (HL1) and o-vanilidene-2-methyl-1-aminobenzene (HL2) lead to the formation of mono- and bis-[(Cl)Zn(L1)] (1), [(Cl)Zn(L2)] (2), [(Cl)Hg(L1)] (3), [(Cl)Hg(L2)] (4), [Zn(L1)2] (5), [Zn(L2)2] (6), [Hg(L1)2] (7), and [Hg(L2)2] (8) complexes by reactions of zinc(II) and mercury(II) chlorides in different mole ratio(s). Complexes 1–8 have been characterized by elemental analyses (Zn, Hg, C, H, Cl, and N), melting point and spectral (IR, 1H-NMR), PXRD, molar conductivity measurement, and TGA. Conductivity measurements suggest non-electrolytes. Structural compositions have been assigned by mass spectral studies. Four-coordinate geometry may be assigned to these complexes tentatively. Structural study reveals that in 1–4 two metal centers are held together by two bridged (μ2-Cl) chlorides, whereas 5–8 contain two bidentate Schiff-base ligands around one metal-producing monomers. 相似文献
20.
Three mercury(II) complexes containing double-betaine and halide ligands, [(HgCl2)2(L1)]
n
(1), [(HgBr2)2(L1)(H2O)2]
n
(2), and [2HgCl2(HL1)·Hg2Cl6]
n
(3) [L1=–O2CCH2N+(CH2CH2)3-N+H2CO2
–], have been prepared and shown to have polymeric structures by single-crystal X-ray analysis. Complex (1) exhibits an infinite zigzag chain in which each mercury(II) atom is coordinated by pairs of carboxylate oxygen atoms and chloride ligands in a distorted tetrahedral geometry. In complex (2), the mercury(II) atom is in an unusual square-planar coordination geometry, and weak mercury-ligand and hydrogen bonding extend the structural skeletons into a three-dimensional network. Complex (3) consists primarily of an assembly of HgCl2(HL1) moieties and [Hg2Cl6]– anions, and the mercury(II) atoms are in planar T-shaped and distorted tetrahedral coordination environments, respectively. The resulting three-dimensional network is based on the cross-linkage of nearly planar, wide ribbons running in thea direction. 相似文献