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1.
The paper presents structural studies of the tricarbonyl complexes incorporating 4,7-diphenyl-1,10-phenanthroline (dpphen) - [Re(CO)3(dpphen)Cl]2·Me2CO (1) and [Re(CO)3(dpphen)Cl] (2). The absorption and emission spectra of [Re(CO)3(dpphen)Cl] were discussed with the aid of DFT and time-dependent TD-DFT theories. The theoretical studies reveal mixing between the singlet (S1) and triplet (T1) excited states of MLCT character.  相似文献   

2.
Two bromo rhenium(I) carbonyl complexes with the formula of [Re(CO)3(L)Br], where L = 1,10-phenanthroline (Phen-Re) and 5-(1H-pyrrol-1-yl)-1,10-phenanthroline (Pyph-Re), were successfully synthesized with the aim to analyze the effect of the pyrrole (Py) moiety on the photophysical properties of Pyph-Re. It was found that the triplet metal-to-ligand charge-transfer dπ (Re) → π*(N-N) emission of Phen-Re and Pyph-Re centered at ca. 527 nm with the luminescence quantum yield (LQY) of 0.015 and ca. 578 nm with the LQY of 0.011, respectively. At the same time, the geometrical structures of the ground state and the absorption spectral properties of Phen-Re and Pyph-Re were also calculated with the 6-31G* basis set employed on C, H, N, O, and Br atoms, and LANL2DZ adopted on Re atom. According to the experimental and theoretical analysis, the red-shift of the photoluminescent spectrum and the lower LQY of Pyph-Re should be mainly attributed to the narrower energy gap between the highest occupied molecular orbital and the lowest unoccupied molecular orbital and the more LLCT transition ration of Pyph-Re, respectively.  相似文献   

3.
The ground and the lowest-lying triplet excited state geometries, electronic structures, and spectroscopic properties of a novel series of neutral iridium(III) complexes with cyclometalated alkenylquinoline ligands [(C^N)2Ir(acac)] (acac = acetoylacetonate; C^N = 2-[(E)-2-phenyl-1-ethenyl]pyridine (pep) 1; 2-[(E)-2-phenyl-1-ethenyl]quinoline (peq) 2; 1-[(E)-2-phenyl-1-ethenyl]isoquinoline (peiq) 3; 2-[(E)-1-propenyl]pyridine (pp) 4; 2-[(E)-1-fluoro-1-ethenyl]pyridine (fpp) 5) were investigated by DFT and CIS methods. The highest occupied molecular orbital is composed of d(Ir) and π(C^N) orbital, while the lowest unoccupied molecular orbital is dominantly localized on C^N ligand. Under the TD-DFT with PCM model level, the absorption and phosphorescence in CH2Cl2 media were calculated based on the optimized ground and triplet excited state geometries, respectively. The calculated lowest-lying absorptions at 437 nm (1), 481 nm (2), 487 nm (3), 422 nm (4), and 389 nm (5) are attributed to a {[dx2-y2(Ir) + dxz(Ir) + π(C^N)] → [π∗(C^N)]} transition with metal-to-ligand/intra-ligand charge transfer (MLCT/ILCT) characters, and the calculated phosphorescence at 582 nm (1), 607 nm (2), 634 nm (3), 515 nm (4), and 491 nm (5) can be described as originating from the 3{[dx2-y2(Ir) + dxz(Ir) + π (C^N)] [π∗(C^N)]} excited state with the 3MLCT/3ILCT characters. The calculated results revealed that the phosphorescent color of these new Ir(III) complexes can be tuned by changing the π-conjugation effect strength of the C^N ligand.  相似文献   

4.
A series of mononuclear and binuclear cyclometalated platinum(II) complexes containing new terdentate meta-bis(2-pyridoxy)benzene ligands: 3,5-bis(2-pyridoxy)toluene (L1H) and 3,5-bis(2-pyridoxy)-2-dodecylbenzene (L2H): [Pt(L1)Cl] (1), [Pt(L2)Cl] (2), [Pt(L1)(CH3CN)](ClO4) (3), {[Pt(L1)]2(μ-dppm)}(ClO4)2 (4), {[Pt(L2)]2(μ-dppm)}(ClO4)2 (5), {[Pt(L1)]2(μ-pyrazole)}(ClO4) (6), {[Pt(L2)]2(μ-pyrazole)}(ClO4) (7), {[Pt(L1)]2(μ-imidazole)}(ClO4) (8) and {[Pt(L2)]2(μ-imidazole)}(ClO4) (9), have been synthesized and characterized. These ligands are coordinated to platinum(II) in a “pincer”-like manner and the presence of pyridyl donors enhances the availability of the ligand π orbitals for electronic transition. Spectroscopic properties of these cyclometalated complexes were studied. While the non-coplanar nature of the ligands hinders ligand-ligand and metal-metal interactions in these cyclometalated complexes, the presence of long hydrocarbon side chain on ligand L2H seems to alleviate such hindrance. Intermolecular π-π, and possibly Pt-Pt interactions were observed in complex 2 at high concentration.  相似文献   

5.
The novel pyrazolyl containing ligands 4-(HOOC)pz(CH2)2NH(CH2)2NH2 (L1) and 4-(HOOCCH2)-3,5-Me2pz(CH2)2NH(CH2)2NH2 (L2), and 3,5-Me2pz(CH2)2S(CH2)2SCH2CH3 (L3), 3,5-Me2pz(CH2)2S(CH2)2SCH2COOEt (L4) and 3,5-Me2pz(CH2)2S(CH2)2SCH2COOH (L5) were synthesized, and their ability to stabilise complexes with the fac-[M(CO)3]+ (M = Re,99mTc) moiety was evaluated. Reactions of L1-L5 with the Re(I) tricarbonyl starting materials (NEt4)2[Re(CO)3Br3] and/or [Re(CO)5Br] afforded complexes fac-[Re(CO)33-L)] (L = L1-L5 (1-5)), which contain the pyrazolyl ancillary ligands coordinated in a tridentate fashion. Complexes 1-5 were characterized by the common analytical techniques, which included single crystal X-ray diffraction analysis in the case of 4. The structural analysis of 4 confirmed the tridentate coordination mode of the pyrazole-dithioether ligand, which is facially coordinated to the Re(I) centre through the nitrogen from the pyrazole ring and the two thioether sulphur atoms, without involvement of the terminal ester functional group. The distorted octahedral coordination environment around the metal is completed by the three facial carbonyl ligands. The radioactive congeners of complexes 1, 3 and 4, fac-[99mTc(CO)33-L)]+ (L = L1 (1a), L3 (3a), L4 (4a)), have been prepared by reacting the precursor fac-[99mTc(CO)3(H2O)3]+ with the corresponding ligands, and their identity confirmed by HPLC comparison with the rhenium surrogates. Complexes 1a and 3a have been challenged in the presence of a large excess of histidine or cysteine, in order to evaluate their in vitro stability. Only a negligible displacement was observed, indicating that pyrazole-diamine and pyrazole-dithioether chelators provide a high kinetic inertness and/or stability to organometallic complexes with the fac-[99mTc(CO)3]+ moiety.  相似文献   

6.
Four molybdenum(VI) thiosemicarbazonato complexes have been synthesized and characterized. The dinuclear complexes [(MoO2L1)2] (1) and [(MoO2L2)2] (3) have been prepared by the reaction of [MoO2(acac)2] with 2-hydroxyacetophenone N(4)-cyclohexyl (H2L1) and N(4)-phenyl (H2L2) thiosemicarbazones in alcoholic medium. Mononuclear dioxomolybdenum(VI) complexes of the type [MoO2L1py] (2) and [MoO2L2py] (4) have been prepared by the reaction of 1 or 3 with pyridine (py) in alcoholic medium. In all the complexes, molybdenum is coordinated by two terminal oxo-oxygen atoms, (Ot), oxygen, nitrogen and sulfur atoms from the principal ligand and by an oxygen atom from the second unit in 1, and by a nitrogen atom from pyridine in complexes 2 and 4. All complexes have been spectroscopically characterized. The molecular structures of complexes 1, 2 and 4 have been determined by the single crystal X-ray diffraction method.  相似文献   

7.
Photocycloaddition reactions of 6,6′-dimethyl-4,4′-[bis(methylenoxy)phenylene]-di-2-pyrones (4a-c) with benzophenone (2a) by mixing in the solid state (solid solution) afforded the corresponding oxetane derivatives (5a-c; 1:2 adducts) with high site- and regioselectivity across the C5-C6 and C5′-C6′ double bonds in 4 via the triplet excited state of benzophenone. The oxetane formation proceeded more effectively in the solid state than in solution. The reaction mechanism was inferred by MO methods to be initiated by electrostatic interaction between the C6 position of 4a-c and the carbonyl oxygen of 2a in their ground states. The solid-state interaction may be enhanced by the electron density at the carbonyl oxygen of the triplet 2a. The transition state (TS) analysis of the [2+2] cycloaddition reactions also suggested some triplet complexes and high regioselectivity. The hydrogen-bonding interaction between 2a and 4a-c and the triplet reaction mechanism were also explained by the IR analyses and the quenching experiments, respectively.  相似文献   

8.
The visualization of inducible nitric oxide synthase (iNOS) in vivo with specific radioactive probes could provide a valuable insight into the diseases associated with upregulation of this enzyme. Aiming at that goal, we have synthesized a novel family of conjugates bearing a pyrazolyl-diamine chelating unit for stabilization of the fac-[M(CO)3]+ core (M = 99mTc, Re) and pendant guanidino (L1 = guanidine, L2 = N-hydroxyguanidine, L3 = N-methylguanidine, L4 = N-nitroguanidine) or S-methylisothiourea (L5) moieties for iNOS recognition. L1-L5 reacted with fac-[M(CO)3(H2O)]+, yielding complexes of the type fac-[M(CO)3(k3-L)]+ (M = Re/99mTc; 1/1a, L = L1; 2/2a, L = L2; 3/3a, L = L3; 4/4a, L = L4; 5/5a, L = L5), which were fully characterized by the usual analytical methods in chemistry and radiochemistry, including X-ray diffraction analysis in the case of 1. The rhenium complexes 1-5 were prepared as “cold” surrogates of the 99mTc(I) complexes. Enzymatic assays with murine purified iNOS demonstrated that L1, L2, 1 and 2 are poor NO-producing substrates. These assays have also shown that metallation of L4 and L5 (Ki > 1000 μM) gave complexes with increased inhibitory potency (4, Ki = 257 μM; 5, Ki = 183 μM). The organometallic rhenium complexes permeate through LPS-treated RAW 264.7 macrophage cell membranes, interacting specifically with the target enzyme, as confirmed by the partial suppression of NO biosynthesis (ca. 20% in the case of 4 and 5) in this cell model. The analog 99mTc(I)-complexes 1a-5a are stable in vitro, being also able to cross cell membranes, as demonstrated by internalization studies in the same cell model with compound 4a (4h, 37 °C; 33.8% internalization). Despite not being as effective as the α-amino-acid-containing metal-complexes previously described by our group, the results reported herein have shown that similar 99mTc(I)/Re(I) organometallic complexes with pendant amidinic moieties may hold potential for targeting iNOS expression in vivo.  相似文献   

9.
A series of tetrathiafulvalene-substituted 2,3-di(2-pyridyl)quinoxaline (dpq) ligands, 2-(4,5-bis(methylthio)-1,3-dithiol-2-ylidene)-6,7-di(pyridin-2-yl)- [1,3]dithiolo[4,5-g]quinoxaline (L1), dimethyl-2-(6,7-di(pyridin-2-yl)-[1,3]dithiolo[4,5-g]quinoxalin-2-ylidene)-1,3-dithiole-4,5-dicarboxylate (L2), and 2-(5,6-dihydro-[1,3]dithiolo[4,5-b] [1,4]dithiin-2-ylidene)-6,7-di(pyridin-2-yl)-[1,3]dithiolo[4,5-g]quinoxaline (L3), have been prepared. Reactions of these ligands with Re(CO)5Cl afford the corresponding dinuclear rhenium(I) carbonyl complexes, Re2(L)(CO)6Cl2 (L = L1, 5a; L = L2, 5b; L = L3, 5c). All new compounds are fully characterized by 1H NMR, IR and mass spectroscopies. The crystal structures of 5a and 5b have been studied. Optimized conformations and molecular orbital diagrams of 5a5c have been calculated with density functional theory (DFT). The spin-allowed singlet−singlet electronic transitions of all complexes have been calculated with time-dependent DFT (TDDFT), and the UV-Vis−NIR spectra are discussed based on the theoretical calculations.  相似文献   

10.
The rhenium(I) carbonyl halide (X = Cl and Br) complexes, [ReX(CO)3{H2(py)L2}] (1a, 1b) and [ReX(CO)3{H2(Fc)L2}] (2a, 2b), of the ligands derived from 2-acetylpyridine and ferrocenyl carbaldehyde derivatives of 2-hydroxybenzoic acid hydrazide [H2(py)L2 and H2(Fc)L2, respectively] have been prepared in good yield. The complexes have been characterized by elemental analysis, MS, IR, UV-Vis and 1H NMR spectroscopic methods and their structures have been elucidated by X-ray diffraction. The ligand forms a five-membered chelate ring but in H2(py)L2 it is Npyridine,N′-bidentate while it is O,N-bidentate in H2(Fc)L2 complexes.Reaction of complex 1a with copper(II) nitrate yields the unexpected aqua complex [Re{H(py)L2}(H2O)(CO)3] (3) where the ligand is monodeprotonated but maintains the coordination mode observed in 1a, as shown by X-ray diffraction. However, reaction of 1b with glycine yields a conformational polymorph of the original compound, 1b′. The X-ray study shows that the orientation of the O-H phenol group against the carbonyl amide group is the main difference.  相似文献   

11.
The new pyrazole-containing ligand 3,5-Me2pz(CH2)2S(CH2)2COOH (L1H) was synthesized and used to prepare the complexes fac-[M(κ3-L1)(CO)3] (M = Re (1), 99mTc(1a)), which were obtained in high yield albeit with a low specific activity in the case of 99mTc. The X-ray diffraction analysis of 1 confirmed that L1 coordinates to the metal as monoanionic and through a (N,S,O) donor atom set. Challenge experiments of 1a against cysteine and histidine showed that this complex suffers considerable transchelation in vitro. This contrasts with the behavior exhibited by the related complex fac-[99mTc(κ3-L2)(CO)3] (2a) (L2 = 3,5-Me2pz-(CH2)2NH-CH2-COO), anchored by a (N2O)-tridentate ligand. Biodistribution studies of 1a and 2a in mice indicated that both compounds have a relatively similar biological profile. Nevertheless, the fastest blood clearance and minor hepatic retention found for 2a has shown that this complex is more adequate to be further explored in radiopharmaceutical sciences. DFT calculations (ADF program) were performed for these neutral complexes and related cationic M(I) (M = Re, Tc) tricarbonyl complexes anchored by pyrazole-containing ligands, in order to have a better understanding of the influence of the donor atom set (N,N,O vs. N,O,S; N,N,N vs. N,N,S vs. N,S,S) on their in vitro stability. The differences of the calculated binding energies are not significant, suggesting that the in vitro behavior of these Re(I)/Tc(I) tricarbonyl complexes is not determined by thermodynamic factors.  相似文献   

12.
Two new N-pyrazole, P-phosphinite hybrid ligands 3-(3,5-dimethyl-1H-pyrazol-1-yl)propyldiphenylphosphinite (L3) and 2-(3,5-diphenyl-1H-pyrazol-1-yl)ethyldiphenylphosphinite (L4) are presented. The reactivity of these ligands and two other ligands reported in the literature (3,5-dimethyl-1H-pyrazol-1-yl)methyldiphenylphosphinite (L1) and 2-(3,5-dimethyl-1H-pyrazol-1-yl)ethyldiphenylphosphinite (L2) towards [RhCl(CO)2]2 (1) have been studied and complexes [RhCl(CO)L] (L = L2 (2), L3 (3) and L4 (4)) have been obtained. For L1 only decomposition products have been achieved. All complexes were fully characterised by analytical and spectroscopic methods and the resolution of the crystalline structure of complexes 2 and 3 by single-crystal X-ray diffraction are also presented. In these complexes, the ligands are coordinated via κ2(N,P) to Rh(I), forming metallocycles of seven (2 and 4) or eight (3) members and finish its coordination with a carbonyl monoxide and a trans-chlorine to phosphorus atom. In both complexes, weak intermolecular interactions are present. NMR studies of complexes 2-4 show the chain N-(CH2)x-O becomes rigid and the protons diastereotopic.  相似文献   

13.
Three novel tricarbonyl rhenium(I) complexes of chelating ligands with aromatic N-heterocycle ring and aliphatic amine donor (2-aminomethylpyridine (ampy), 2-(2-aminophenyl)-1H-benzimidazole (apbi) and 2-(2-aminophenyl)benzothiazole (apbt)) have been synthesized and characterized. The compounds [Re(CO)3(ampy)Cl] (1), [Re(CO)3(apbi)Cl] (2) and [Re(CO)3(apbt)Cl] (3) have been identified by IR, UV-Vis spectroscopy and X-ray analysis. The experimental studies on the complexes 1, 2 and 3 have been accompanied computationally by the density functional theory (DFT) calculations.  相似文献   

14.
A series of Ag(I) complexes containing the 2-amino-5-halopyrimidine ligands have been synthesized and their structures characterized by X-ray crystallography. The isomorphous complexes Ag(L-Cl)2(CF3SO3) (L-Cl = 2-amino-5-chloropyrimidine), 1, and Ag(L-Br)2(CF3SO3) (L-Br = 2-amino-5-bromopyrimidine), 2, are mononuclear, while [Ag(L-Br)(CF3SO3)]6·6C4H10O, 3, and [Ag(L-I)(CF3SO3)]6 (L-I = 2-amino-5-iodopyrimidine), 4, show cyclic self-assembly of six Ag(Ι) atoms and six L-X ligands, resulting in 24-membered metallocycles. The complex [Ag(L-I)(CF3SO3)], 5, forms 1D zigzag chains which are linked through C-I?Ag and Ag?O interactions to form a 3D structure. The tetranuclear complexes [Ag(L-X)(NO3)]4 [X = Cl, 6; Br, 7] form 16-membered metallocycles, while [Ag(L-X)(ClO4)] [X = Cl, 8; Br, 9] exhibit helical chains. The different structure of 5 from 1 and 2 appears to be due to the stronger nucleophilic character of the iodine atom. In these complexes, the relatively smaller NO3 anions lead to the formation of tetranuclear metallocycles and the larger CF3SO3 anions support the hexanuclear metallocycles, whereas the ClO4 anions induce the helical chains.  相似文献   

15.
The binuclear alkoxycarbene complexes [M2(CO)9{C(OEt)C4H3Y}] (M = Mn, Y = S(1), O(2); Re, Y = S(3), O(4)) were synthesised and characterised, giving axial carbene ligands for the dimanganese complexes, and equatorial carbene ligands for the dirhenium complexes. Aminolysis of these complexes with ammonia and n-propylamine yielded complexes [M2(CO)9{C(NHR)C4H3Y}] (R = H, M = Mn, Y = S(5), O(6); Re, Y = S(7), O(8); R = propyl, M = Mn, Y = S(9), O(10); Re, Y = S(11), O(12)). For the smaller NH2-substituted carbene ligands, the X-ray structures determined showed equatorial carbene ligands for both dimanganese and dirhenium complexes, while the NHPr-substituted carbene complexes retained the original configurations of the precursor alkoxy carbene complex, indicating that the steric effects of both the M(CO)5-fragment and the carbene ligand substituent can affect the coordination site of the carbene ligands of Group VII transition metal complexes in the solid state.  相似文献   

16.
The new potentially bidentate pyrazole-phosphinite ligands [(3,5-dimethyl-1H-pyrazol-1-yl)methyl diphenylphosphinite] (L1) and [2-(3,5-dimethyl-1H-pyrazol-1-yl)ethyl diphenylphosphinite] (L2) were synthesised and characterised. The reaction of L1 and L2 with the dimeric complexes [Ru(η6-arene)Cl2]2 (arene = p-cymene, benzene) led to the formation of neutral complexes [Ru(η6-arene)Cl2(L)] (L = L1, L2) where the pyrazole-phosphinite ligand is κ1-P coordinated to the metal. The subsequent reaction of these complexes with NaBPh4 or NaBF4 produced the [Ru(η6-p-cymene)Cl(L2)][BPh4] and [Ru(η6-benzene)Cl(L2)][BF4] compounds which contain the pyrazole-phosphinite ligand κ2-P,N bonded to ruthenium. All the complexes were fully characterised by analytical and spectroscopic methods. The structure of the complex [Ru(η6-p-cymene)Cl(L2)][BPh4] was also determined by a X-ray single crystal diffraction study.  相似文献   

17.
1-(Phenylselenomethyl)-1H-benzotriazole (L1) and 1-(4-methoxyphenyltelluromethyl)-1H-benzotriazole (L2) have been synthesized by reacting 1-(chloromethyl)-1H-benzotriazole with in situ generated nucleophiles PhSe and ArTe, respectively. The complexes of L1 and L2 with Pd(II) and Ru(II)(η6-p-cymene) have been synthesized. Proton, carbon-13, Se-77 and/or Te-125 NMR spectra authenticate both the ligands and their complexes. The single crystal structures of L1, L2 and [RuCl(η6-p-cymene)(L)][PF6] (L = L1: 3, L = L2: 4) have been solved. The Ru-Se and Ru-Te bond lengths have been found 2.4801(11) and 2.6183(10) Å, respectively. The palladium complexes, [PdCl2(L)] (L = L1: 1, L = L2: 2) have been explored for Heck and Suzuki-Miyaura C-C coupling reactions. The TON values are upto 95,000. The Ru-complexes have been found promising for catalytic oxidation of alcohols (TON ∼ 7.8-9.4 × 104). The complexes of telluroether ligands are as efficient catalysts as those of selenoether ones and in fact better for catalytic oxidation.  相似文献   

18.
The syntheses and structures of a series of metal complexes, namely Cu2Cl4(L1)(DMSO)2·2DMSO (L1 = N,N′-bis(2-pyridinyl)-1,4-benzenedicarboxamide), 1; {[Cu(L2)1.5(DMF)2][ClO4]2·3DMF} (L2 = N,N′-bis(3-pyridinyl)-1,4-benzenedicarboxamide), 2; {[Cd(NO3)2(L3)]·2DMF} (L3 = N,N′-bis-(2-pyrimidinyl)-1,4-benzenedicarboxamide), 3; {[HgBr2(L3)]·H2O}, 4, and {[Na(L3)2][Hg2X5]·2DMF} (X = Br, 5; I, 6) are reported. All the complexes have been characterized by elemental analysis, IR spectra and single crystal X-ray diffraction. Complex 1 is dinuclear and the molecules are interlinked through S?S interactions. In 2, the Cu(II) ions are linked through the L2 ligands to form 1-D ladder-like chains with 60-membered metallocycles, whereas complexes 3 and 4 form 1-D zigzag chains. In complexes 5 and 6, the Na(I) ions are linked by the L3 ligands to form 2-D layer structures in which the [Hg2X5] anions are in the cavities. The L2 ligand acts only as a bridging ligand, while L1 and L3 show both chelating and bridging bonding modes. The L1 ligand in 1 adopts a trans-anti conformation and the L2 ligand in 2 adopts both the cis-syn and trans-anti conformations, whereas the L3 ligands in 36 adopt the trans conformation.  相似文献   

19.
Reaction of 2,3-diaminopyridine with one equivalent of a functionalised vicinal diketone, in ethanol, yields a series of ligands based upon the pyrido[2,3-b]pyrazine core. The ligands were characterised by 1H, 13C–{1H} NMR, MS and UV–Vis spectroscopy. Reaction of the ligands with one equivalent of {ReBr(CO)5} gave a series of Re-Ln complexes based upon the general formula fac-{ReBr(CO)3(L)} (where L = pyrido[2,3-b]pyrazine-derived ligands, L1L6). Solution IR studies confirmed the retention of the facially capped, tri-carbonyl coordination geometry at rhenium, and 1H NMR studies confirmed coordination of the ligand to Re(I). EI HR MS data were obtained for each complex confirming the proposed formulation and stoichiometry. Single crystal X-ray structures were obtained for three of the complexes (Re-L1, Re-L2, Re-L6), with each demonstrating that the ligands coordinate to Re(I) in a bidentate manner, via a four-membered chelate ring, which was unsymmetrical in the former two cases. The electronic absorption spectra of the complexes showed absorption into the visible region ca. 375–500 nm, (the complexes are orange-red in appearance). Following irradiation at 350–450 nm, the complexes display a solid-state broad emission peaking between 600–700 nm. The complexes were not sufficiently luminescent in solution to allow further investigation into the origin of this emission band, although with reference to related 1,8-naphthyridine complexes of Re(I) it is likely to incorporate significant 3MLCT character.  相似文献   

20.
Four new coordination complexes with azole heterocycle ligands bearing acetic acid groups, [Co(L1)2]n (1), [CuL1N3]n (2), [Cu(L2)2·0.5C2H5OH·H2O]n (3) and [Co(L2)2]n (4) (here, HL1=1H-imidazole-1-yl-acetic acid, HL2=1H-benzimidazole-1-yl-acetic acid) have been synthesized and structurally characterized. Single-crystal structure analysis shows that 3 and 4 are 2D complexes with 44-sql topologies, while another 2D complex 1 has a (43)2(46)-kgd topology. And 2 is a 3D complex composed dinuclear μ1,1-bridging azido CuII entities with distorted rutile topology. The magnetic properties of 1 and 2 have been studied.  相似文献   

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