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1.
Reaction of the potassium salts of (EtO)2P(O)CH2C6H4-4-(NHC(S)NHP(S)(OiPr)2) (HLI), (CH2NHC(S)NHP(S)(OiPr)2)2 (H2LII) or cyclam(C(S)NHP(S)(OiPr)2)4 (H4LIII) with [Cu(PPh3)3I] or a mixture of CuI and Ph2P(CH2)1-3PPh2 or Ph2P(C5H4FeC5H4)PPh2 in aqueous EtOH/CH2Cl2 leads to [Cu(PPh3)LI] (1), [Cu2(Ph2PCH2PPh2)2LII] (2), [Cu{Ph2P(CH2)2PPh2}LI] (3), [Cu{Ph2P(CH2)3PPh2}LI] (4), [Cu{Ph2P(C5H4FeC5H4)PPh2}LI] (5), [Cu2(PPh3)2LII] (6), [Cu2(Ph2PCH2PPh2)LII] (7), [Cu2{Ph2P(CH2)2PPh2}2LII] (8), [Cu2{Ph2P(CH2)3PPh2}2LII] (9), [Cu2{Ph2P(C5H4FeC5H4)PPh2}2LII] (10), [Cu8(Ph2PCH2PPh2)8LIIII4] (11), [Cu4{Ph2P(CH2)2PPh2}4LIII] (12), [Cu4{Ph2P(CH2)3PPh2}4LIII] (13) or [Cu4{Ph2P(C5H4FeC5H4)PPh2}4LIII] (14) complexes. The structures of these compounds were investigated by IR, 1H, 31P{1H} NMR spectroscopy; their compositions were examined by microanalysis. The luminescent properties of the complexes 1-14 in the solid state are reported. 相似文献
2.
Palladium [PdCl2(L)] complexes with N-alkylpyridylpyrazole derived ligands [2-(5-trifluoromethyl-1H-pyrazol-3-yl)pyridine (L1), 2-(1-ethyl-5-trifluoromethyl-1H-pyrazol-3-yl)pyridine (L2), 2-(1-octyl-5-trifluoromethyl-1H-pyrazol-3-yl)pyridine (L3), and 2-(3-pyridin-2-yl-5-trifluoromethyl-pyrazol-1-yl)ethanol (L4) were synthesised. The crystal and molecular structures of [PdCl2(L)] (L = L2, L3, L4) were resolved by X-ray diffraction, and consist of monomeric cis-[PdCl2(L)] molecules. The palladium centre has a typical square-planar geometry, with a slight tetrahedral distortion. The tetra-coordinate metal atom is bonded to one pyridinic nitrogen, one pyrazolic nitrogen and two chlorine ligands in cis disposition. Reaction of L (L2, L4) with [Pd(CH3CN)4](BF4)2, in the ratio 1M:2L, gave complexes [Pd(L)]2(BF4)2. Treatment of [PdCl2(L)] (L = L2, L4) with NaBF4 and pyridine (py) and treatment of the same complexes with AgBF4 and triphenylphosphine (PPh3) yielded [Pd(L)(py)2](BF4)2 and [Pd(L)(PPh3)2](BF4)2 complexes, respectively. Finally, reaction of [PdCl2(L4)] with 1 equiv of AgBF4 yields [PdCl(L4)](BF4). 相似文献
3.
N-heterocyclic carbene (NHC) complexes of rhodium(I) (3 and 4) bearing one diether (MeOCH2CH2OCH2CH2-NHC) functionality on N1 and bulky benzyl groups (CH2-C6H2(CH3)3-2,4,6 and CH2-C6(CH3)5) on N3 of (5,6-dimethyl)benzimidazole were synthesized by deprotonation of the corresponding benzimidazolium salt with [Rh(μ-OMe)(1,5-cod)]2 in dichloromethane at ambient temperature. All compounds have been fully characterized by elemental analysis, 1H and 13C NMR spectroscopy. X-ray diffraction studies on single crystals of 3a and 3b confirm the cis square planar geometry. All of the new benzimidazol-2-ylidene rhodium(I) complexes were found to be effective catalysts for the transfer hydrogenation reaction. 相似文献
4.
A series of flexible dithioethyl ligands that contain ethyleneoxy segments were designed and synthesized, including bis(2-(pyridin-2-ylthio)ethyl)ether (L1), 1,2-bis(2-(pyridin-2-ylthio)ethoxy)ethane (L2), bis(2-(benzothiazol-2-ylthio)ethyl)ether (L3) and 1,2-bis(2-(benzothiazol-2-ylthio)ethoxy)ethane (L4). Reactions of these ligands with AgNO3 led to the formation of four new supramolecular coordination complexes, [Ag2L1(NO3)2]2 (1), [Ag2L2(NO3)2] (2), [AgL3(NO3)]∞ (3) and [AgL4(NO3)] (4) in which the length of the (CH2CH2O)n spacers and the terminal groups of ligands cause subtle geometrical differences. Studies of the inhibitory effect to the growth of Phaeodactylum tricornutum show that all four complexes are active and the compound 4 has the highest inhibitory activity. 相似文献
5.
Reactions of ligands 1-ethyl-5-methyl-3-phenyl-1H-pyrazole (L1) and 5-methyl-1-octyl-3-phenyl-1H-pyrazole (L2) with [PdCl2(CH3CN)2 and K2PtCl4 gave complexes trans-[MCl2(L)2] (L = L1, L2). The new complexes were characterised by elemental analyses, conductivity measurements, infrared, 1H and 13C{1H} NMR spectroscopies and X-ray diffraction. The NMR study of the complex [PdCl2(L1)2], in CDCl3 solution, is consistent with a very slow rotation of ligands around the Pd-N bond, so that two conformational isomers can be observed in solution (syn and anti). Different behaviour is observed for complexes [PdCl2(L2)2] and [PtCl2(L)2] (L = L1, L2), which present an isomer in solution at room temperature (anti). The crystal structure of [PdCl2(L1)2] complex is described, where the Pd(II) presents a square planar geometry with the ligands coordinated in a trans disposition. 相似文献
6.
Bis-bidentate Schiff base ligand L and its two mononuclear complexes [CuL(CH3CN)2]ClO4 (1) and [CuL(PPh3)2]ClO4 (2) have been prepared and thoroughly characterized by elemental analyses, IR, UV-Vis, NMR spectroscopy and X-ray diffraction analysis. In both the complexes the metal ion auxiliaries adopt tetrahedral coordination environment. Their reactivity, electrochemical and photophysical behavior have been studied. Complex 1 shows reversible CuII/I couple with potential 0.74 V versus Ag/AgCl in CH2Cl2. At room temperature L is weakly fluorescent in CH2Cl2, however in Cu(I) complexes 1 and 2 the emission in quenched. 相似文献
7.
Jun-Jie Wang 《Inorganica chimica acta》2009,362(9):3147-3943
In our efforts to investigate the relationships between the structures of ligands and their complexes, two structurally related ligands, 1-(2-pyridylmethyl)-1H-benzimidazole (L1) and 1-(4-pyridylmethyl)-1H-benzimidazole (L2), and their four complexes, [Zn(L1)2Cl2] (1), [Hg(L1)Br2]∞ (2), {[Zn(L2)Cl2](CH3CN)}∞ (3) and [Hg(L2)Br2]2(CH3CN)2 (4) were synthesized and structurally characterized by elemental analyses, IR spectra and single-crystal X-ray diffraction analysis. Structural analyses show that 1 has a mononuclear structure, and 2 and 3 both take 1D structure. While 4 takes a dinuclear structure. 1, 2 and 4 were further linked into higher-dimensional supramolecular networks by weak interactions, such as C-H?Cl and C-H?Br H-bonding, C-H?π, and π?π stacking interactions. The structural differences of 1-4 may be attributed to the difference of the spatial positions of the terminal N donor atoms in the pendant pyridyl groups in L1 and L2, in which the pyridine rings may act as the directing group for coordination and the benzimidazole rings act as the directing group for π?π stacking and C-H?π interactions. The luminescent properties of the corresponding complexes and ligands have been further investigated. 相似文献
8.
Susana Quintal Inês Fonseca Michael G.B. Drew Margarida Meireles 《Inorganica chimica acta》2008,361(6):1584-1596
The reaction of FcCOCl (Fc = (C5H5)Fe(C5H4)) with benzimidazole or imidazole in 1:1 ratio gives the ferrocenyl derivatives FcCO(benzim) (L1) or FcCO(im) (L2), respectively. Two molecules of L1 or L2 can replace two nitrile ligands in [Mo(η3-C3H5)(CO)2(CH3CN)2Br] or [Mo(η3- C5H5O)(CO)2(CH3CN)2Br] leading to the new trinuclear complexes [Mo(η3-C3H5)(CO)2(L)2Br] (C1 for L = L1; C3 for L = L2) and [Mo(η3-C5H5O)(CO)2(L)2Br] (C2 for L = L1; C4 for L = L2) with L1 and L2 acting as N-monodentade ligands. L1, L2 and C2 were characterized by X-ray diffraction studies. [Mo(η3-C5H5O)(CO)2(L1)2Br] was shown to be a trinuclear species, with the two L1 molecules occupying one equatorial and one axial position in the coordination sphere of Mo(II). Cyclic voltammetric studies were performed for the two ligands L1 and L2, as well as for their molybdenum complexes, and kinetic and thermodynamic data for the corresponding redox processes obtained. In agreement with the nature of the frontier orbitals obtained from DFT calculations, L1 and L2 exhibit one oxidation process at the Fe(II) center, while C1, C3, and C4 display another oxidation wave at lower potentials, associated with the oxidation of Mo(II). 相似文献
9.
The coordination chemistry of thioether functionalized cyclodiphosphazane ligand, cis-{tBuNP(OCH2CH2SCH3)}2 (1) is described. The reactions of 1 with [Pd (COD)Cl2] in 1:1, 1:2 and 2:1 M ratios afforded cis-[PdCl2{tBuNP(OCH2CH2SCH3)}2] (2), cis-[{PdCl2}2{tBuNP(OCH2CH2SCH3)}2] (3) and trans-[PdCl2{(tBuNP(OCH2CH2SCH3))2}2] (4), respectively. Treatment of 1 with [Pd(PEt3)Cl2]2 or [PdCl(η3-C3H5)]2 in appropriate molar ratios produce the mono- and binuclear complexes [PdCl2(PEt3{tBuNP(OCH2CH2SCH3)}2] (5) and [{PdCl(η3-C3H5)}2{tBuNP(OCH2CH2SCH3)}2] (6) in good yield. The reaction of 1 with [{Ru(p-cymene)Cl2}2] afforded the mononuclear cationic complex, [{(p-cymene)RuCl{tBuNP(OCH2CH2SCH3)}2]Cl (7), whereas the reactions of [Rh(COD)Cl]2, [Pt(COD)Cl2] and [Au(SMe2)Cl] with 1 yielded the corresponding P-coordinated neutral complexes, [RhCl(COD){tBuNP(OCH2CH2SCH3)}2] (8)cis-[PtCl2{tBuNP(OCH2CH2SCH3)}2] (9), respectively. The binuclear palladium(II) complex 3 was found to be an effective catalyst for the Suzuki-Miyaura cross-coupling reactions. 相似文献
10.
So Young Lee 《Inorganica chimica acta》2009,362(4):1047-3853
Two isomeric dibenzo-O2S2 macrocycles L1 and L2 have been synthesised and their coordination chemistry towards palladium(II) has been investigated. Two-step approaches via reactions of 1:1-type complexes, [cis-Cl2LPd] (1a: L = L1, 1b: L = L2), with different O2S2 macrocycle systems (L1 and L2) have led to the isolation of the following bis(O2S2 macrocycle) palladium(II) complexes in the solid state: [Pd(L1)2](ClO4)2 (2a) and a mixture of [Pd(L1)2](ClO4)2 (2a) + [Pd(L2)2](ClO4)2 (2b). 相似文献
11.
Reaction of [(p-cymene)RuCl2(PPh3)] (1) or [Cp∗MCl2(PPh3)] (Cp∗ = C5Me5) (3a: M = Rh; 4a: M = Ir) with 1-alkynes and PPh3 were carried out in the presence of KPF6, generating the corresponding alkenyl-phosphonio complexes, [(p-cymene)RuCl(PPh3){CHCR(PPh3)}](PF6) (2a: R = Ph; 2b: R = p-tolyl) or [Cp∗MCl(PPh3){CHCPh(PPh3)}](PF6) (5: M = Rh; 6: M = Ir). Similar reactions of complexes [Cp∗RhCl2(L1)] (3a: L1 = PPh3; 3c: L1 = P(OMe)3) with L2 (L2 = PPh3, PMePh2, P(OMe)3) gave [Cp∗RhCl(L1)(L2)](PF6) (7bb: L1 = L2 = PMePh2; 7ca: L1 = P(OMe)3, L2 = PPh3; 7cc: L1 = L2 = P(OMe)3). Alkenyl-phosphonio complex 5 was treated with P(OMe)3 or 2,6-xylyl isocyanide, affording [Cp∗RhCl(L){CHCPh(PPh3)}](PF6) (8a: L = P(OMe)3; 8b: L = 2,6-xylNC). X-ray structural analyses of 2a, 6 and 8a revealed that the phosphonium moiety bonded to the Cβ atom of the alkenyl group are E configuration. 相似文献
12.
Martínez A Suárez J Shand T Magliozzo RS Sánchez-Delgado RA 《Journal of inorganic biochemistry》2011,105(1):39-45
The interactions of π-arene-Ru(II)-chloroquine complexes with human serum albumin (HSA), apotransferrin and holotransferrin have been studied by circular dichroism (CD) and UV-Visible spectroscopies, together with isothermal titration calorimetry (ITC). The data for [Ru(η6-p-cymene)(CQ)(H2O)Cl]PF6 (1), [Ru(η6-benzene)(CQ)(H2O)Cl]PF6 (2), [Ru(η6-p-cymene)(CQ)(H2O)2][PF6]2 (3), [Ru(η6-p-cymene)(CQ)(en)][PF6]2 (4), [Ru(η6-p-cymene)(η6-CQDP)][BF4]2 (5) (CQ: chloroquine; DP: diphosphate; en: ethylenediamine), in comparison with CQDP and [Ru(η6-p-cymene)(en)Cl][PF6] (6) as controls demonstrate that 1, 2, 3, and 5, which contain exchangeable ligands, bind to HSA and to apotransferrin in a covalent manner. The interaction did not affect the α-helical content in apotransferrin but resulted in a loss of this type of structure in HSA. The binding was reversed in both cases by a decrease in pH and in the case of the Ru-HSA adducts, also by addition of chelating agents. A weaker interaction between complexes 4 and 6 and HSA was measured by ITC but was not detectable spectroscopically. No interactions were observed for complexes 4 and 6 with apotransferrin or for CQDP with either protein. The combined results suggest that the arene-Ru(II)-chloroquine complexes, known to be active against resistant malaria and several lines of cancer cells, also display a good transport behavior that makes them good candidates for drug development. 相似文献
13.
Reactions of labile [MCl3(PPh3)2(NCMe)] (M = Tc, Re) precursors with 1H-benzoimidazole-2-thiol (H2L1), 5-methyl-1H-benzoimidazole-2-thiol (H2L2) and 1H-imidazole-2-thiol (H2L3), in the presence of PPh3 and [AsPh4]Cl gave a new series of trigonal bipyramidal M(III) complexes [AsPh4]{[M(PPh3)Cl(H2L1-3)3]Cl3} (M = Re, 1-3; M = Tc, 4-6). The molecular structures of 1 and 3 were determined by X-ray diffraction. When the reactions were carried out with benzothiazole-2-thiol (HL4) and benzoxazole-2-thiol (HL5), neutral paramagnetic monosubstituted M(III) complexes [M(PPh3)2Cl2(L4,5)] (M = Re, 8, 9; M = Tc, 10, 11) were obtained. In these compounds, the central metal ions adopt an octahedral coordination geometry as authenticated by single crystal X-ray diffraction analysis of 8 and 11. Rhenium and technetium complexes 1, 4 and rhenium chelate compounds 8, 9 have been also synthesized by reduction of [MO4]− with PPh3 and HCl in the presence of the appropriate ligand. All the complexes were characterized by elemental analyses, FTIR and NMR spectroscopy. 相似文献
14.
The mono- and dinuclear base-stabilized gold(I) pyrazolate complexes, (PPh3)Au(μ-3,5-Ph2pz)) (1), (TPA)Au(3,5-Ph2pz), TPA=1,3,5-triaza-7-phophaadamantane (2), [(PPh3)2Au(μ-3,5-Ph2pz)]NO3 (3) and [(dppp)Au(μ-3,5-Ph2pz)]NO3, dppp=bis(diphenylphosphino)propane (4), have been synthesized and structurally characterized. The mononuclear gold(I) complexes 1 and 2 show intermolecular Au?Au interactions of 3.1540(6) and 3.092(6) Å, while the dinuclear gold(I) complexes 3 and 4 show an intramolecular Au?Au distances of 3.3519(7) and 3.109(2) Å, respectively, typical of an aurophilic attraction. Complexes 1-4 exhibit luminescence at 77 K when excited with ca. 333 nm UV light with an emission maximum at ca. 454 nm. The emission has been assigned to ligand-to-metal charge transfer, LMCT, based upon the vibronic structure that is observed. 相似文献
15.
Gregorio Sánchez Joaquín García Luis García Gregorio López 《Inorganica chimica acta》2010,363(6):1084-12865
The reaction between Pd(dba)2 and phosphino-amide ligands yielded the unexpected Pd(II) homoleptic complexes [Pd(o-Ph2PC6H4CO-NR)2] [R = iPr (1), Ph (2), 4-MeC6H4 (3), 4-FC6H4 (4)], in which an κ2-P,N coordination mode for diphenylphosphine-benzamidate ligands is observed. In order to induce amide protonation in the ligands and subsequent κ2-P,O coordination, compounds (1-4) were treated with HClO4(aq) to give cationic complexes [Pd(o-Ph2PC6H4CO-NHR)2][ClO4]2 (5-8). These complexes and the analogous with iminophosphine ligands [Pd(o-Ph2PC6H4CHN-R)2] [ClO4]2 [R = iPr (9), Ph (10)] can be alternatively obtained when [PdCl2(PhCN)2] is treated with AgClO4 in the presence of the corresponding ligand. The reaction of Pd(dba)2 with iminophosphines has also been explored, yielding in this case the Pd(0) derivatives [Pd(o-Ph2PC6H4CHN-R)2] [R = iPr (11), Ph (12)]. X-ray structures of (3), (4), (5), (8) and (9) have been established, allowing an interesting comparative structural discussion. 相似文献
16.
Yasutaka Kataoka Koichi Shimada Tsuneaki Yamagata Kazuhide Tani 《Inorganica chimica acta》2004,357(10):2965-2979
The Indox ligands, [{(S)-(iPr)Indox}n]H (1) [n=2 (a), 3 (b)] and [{(H)Indox}n=3]H (2), in which an indenyl group and an oxazoline ring are connected by an ethylene or propylene spacer, have been prepared. Reaction of [Ir(coe)2Cl]2 or [RhCl(C2H4)2]2 with the potassium salt of 1 afforded η5-[{(S)-(iPr)Indox}n]Ir(coe)2 (3) or η5-[{(S)-(iPr)Indox}n]Rh(C2H4)2 (6) as a 1:1 mixture of two diastereomers. The oxazoline ring in 3 and 6 did not coordinate to the metal center. When the complexes 3 or 6 reacted with iodine in diethyl ether, oxidative addition proceeded and the oxazoline ring coordinated to the metal center to give diiodoiridium(III) or rhodium(III) complexes, η5:η1-[{(S)-(iPr)Indox}n]M(I)2 [M=Ir (4), Rh (7)]. The corresponding diiodoiridium(III) complex bearing the Indox ligand 2, η5:η1-[{(H)Indox}n=2]Ir(I)2 (5), was also prepared by a similar method. Reaction of 4 or 7 with PPh3 in THF afforded diiodo-phosphine complexes, η5-[{(S)-(iPr)Indox}n]M(PPh3)(I)2 [M=Ir (8), Rh (9)] as a 1:1 mixture of two diastereomers in which the oxazoline ring dissociated from the metal center. The related reaction of 8 or 9 with more than 2 equiv. of AgOTf afforded the cationic complexes, [η5:η1-[{(S)-(iPr)Indox}n]M(PPh3)(OTf)]OTf [M=Ir (10), Rh (11)], having a stereogenic center at the metal center as a mixture of only two diastereomers. From 1H and 31P NMR analyses, each diastereomer of 8 or 9 afforded only a single isomer of 10 or 11. The corresponding iridium(III) complex bearing the Indox ligand 2, [η5:η1-[{(H)Indox}n=3]Ir(PPh3)(OTf)]OTf (12) was also prepared. The coordinated triflate ligand of 12 was slowly replaced by water in CDCl3 to afford the dicationic aquo complex, (S*pl,R*Ir)-[η5:η1-[{(H)Indox}n=3]Ir(PPh3)(H2O)](OTf)2 (13). The monocationic complex, [η5:η1-[{(S)-(iPr)Indox}n=2]Ir(PPh3)(I)]OTf (14a), having metal-centered chirality, was observed as a mixture of only two diastereomers in the reaction of 10a (a mixture of two diastereomers) with 1 equiv. of AgOTf. These observations indicated that the ligand exchange reaction of 8 or 9 with AgOTf contained the following three steps: (i) abstraction of one of the two prochiral iododes by AgOTf, (ii) recoordination of the oxazoline ring, and (iii) exchange of the remaining iodide for the triflate by AgOTf. The stereochemistry around the metal center was determined at the second step. All complexes have been characterized by usual spectroscopic methods as well as elemental analyses, and 4 and 13 have been characterized by X-ray analyses. 相似文献
17.
Five copper(I) complexes having general formula [Cu2(μ-X)2(κ2-P,P-B-dppf)2] (X = Cl(1), Br(2), I(3), CN(4), and SCN(5)) were prepared starting with CuX and B-dppf in 1:1 molar ratio in DCM-MeOH (50:50 V/V) at room temperature. The complexes have been characterized by elemental analyses, IR, 1H NMR, 31P NMR and electronic spectral studies. Molecular structures for 1, 2 and 4 were determined crystallographically. Complexes 1, 2 and 4 exist as centrosymmetric dimers in which the two copper atoms are bonded to two bridging B-dppf ligands and two bridging (pseudo-)halide groups in a μ-η1 bonding mode to generate nearly planar Cu2(μ-η1-X)2 framework. Both bridging B-dppf ligands are arranged in antiperiplanar staggered conformation in 1 and 2 (mean value 56.40-56.76°), and twisted from the eclipsed conformation (mean value 78.19°) in 4. The Φ angle value in 4 is relatively larger as compared to 1 and 2. This seems to indicate that the molecular core [Cu2(μ-η1-X)2] in 4 is a sterically demanding system that forces the B-dppf ligand to adopt a relatively strained conformation in comparison to less strained system in 1 and 2. All the complexes exhibit moderately strong luminescence properties in the solution state at ambient temperature. 相似文献
18.
Jahar Lal Pratihar Debprasad Patra Surajit Chattopadhyay 《Inorganica chimica acta》2011,367(1):182-186
Reactions of 2-(arylazo)aniline, HL (H represents the dissociable protons upon orthometallation and HL is p-RC6H4NNC6H4-NH2; RH for HL1; CH3 for HL2 and Cl for HL3) with IrCl3 in methanol afforded orthometallated complexes of composition (L)(HL)IrCl2 (2) and (L)(MeOH)IrCl2 (3), respectively. Complex (L)(MeOH)IrCl2 (3) converted into (L)(CH3CN)IrCl2 (4) upon refluxing in acetonitrile. The X-ray structure of the complexes (L1)(HL1)IrCl2 (2a) and (L3)(CH3CN)IrCl2 (4c) have been determined and characterized unequivocally. The anionic L− binds the metal in tridentate (C, N, N) manner for all the complexes. 相似文献
19.
Wing-Sze Lee Leung-Shi Cheng Chi-Sing Lee Wing-Tak Wong 《Inorganica chimica acta》2004,357(15):4389-4395
Chiral N,O pyridine alcohols HL1-HL6 were used to form complexes with copper(II) ions. Ligands HL1 and HL2 formed complexes with copper(II) ions when Cu(OAc)2 and HL were refluxed in methanol/ethanol mixture. Ligand HL3 formed a complex with copper(II) when deprotonated with NaH and stirred in a Cu(II) acetate THF solution. Ligands HL4-HL6 did not form complexes with copper(II) under similar conditions. Two complexes, [Cu(L1)2] and [Cu(L2)2], were isolated as single crystals and characterized by X-ray crystallography. These complexes showed low catalytic activities in asymmetric reactions. However, they became active when reacted with triflic acid. Copper complexes, [Cu(L)] or [Cu(L)]+, formed in situ by reacting ligands HL with copper(I) or (II) ions, respectively, were also found to be active copper catalysts for asymmetric cyclopropanation of styrene with ethyl diazoacetate and allylic oxidation of cyclohexene with t-butylperoxybenzoate. Enantioselectivities up to 56% and 38% were obtained in asymmetric cyclopropanation of styrene and asymmetric allylic oxidation of cyclohexene, respectively. 相似文献
20.
Mohammad K. Rofouei Marjan Hematyar Vanik Ghoulipour Jafar Attar Gharamaleki 《Inorganica chimica acta》2009,362(10):3777-1363
The reaction of [1,3-di(2-methoxy)benzene]triazene, [HL], with Hg(CH3COO)2 and Hg(SCN)2 in methanol as solvent, resulted in the formation of [HgL2] (1) and [HgL(SCN)] (2), respectively. These compounds were characterized by means of X-ray diffraction, FT-IR spectroscopy, CHN and TGA-DTA analysis. In the lattice of the compound 1, the mono-nuclear complexes were connected to dimer structure by intermolecular non-classical C-H···O hydrogen bonds. Also, weak Hg-η2-arene π-interactions link the dimers into 1D supramolecular chains. The compound 2 is a 2D coordination polymer induced by C-H···π stacking interactions between 1D chains produced by weak Hg-η3-η3-arene π-interactions. The results of studies of the stoichiometry and formation of complexes of 1 and 2 in methanol solution were found to be in support of their solid state stoichiometry. 相似文献