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1.
A new ligand N′-(pyridin-2-ylmethylene)nicotinohydrazide (HL2) and two Ni(II) complexes of stoichiometry NiL1·H2O [L1-2-benzoylpyridine nicotinoylhydrazone] and NiL2·H2O have been synthesized and characterized by elemental analyses, IR and UV–Vis spectral studies. Structures of HL2 and Ni(II) compounds have been determined by single crystal X-ray diffraction studies which reveal a distorted octahedral
geometry around the two Ni(II) centers.
Graphical abstract A new ligand N¢-(pyridin-2-ylmethylene)nicotinohydrazide (HL2) and two Ni(II) complexes of stoichiometry NiL1·H2O [L1-2-benzoylpyridine nicotinoylhydrazone] and NiL2·H2O have been synthesized and characterized by elemental analyses, IR, UV–Vis spectral studies and single crystal X-ray analysis.相似文献
2.
Luana Bettanin Giancarlo V. Botteselle Marcelo Godoi 《Green Chemistry Letters and Reviews》2014,7(2):105-112
Herein, we report the microwave-assisted synthesis of 1,3-diynes from terminal acetylenes, catalyzed by CuI and tetramethylethylenediamine, in the presence of air as the oxidant, at 100 °C for only 10 min under solvent-free conditions. This efficient methodology allowed the homocoupling of several terminal alkynes in moderate to excellent yields. Moreover, the same protocol was also applicable for the synthesis of some unsymmetrical 1,3-diynes through the cross-coupling reaction. 相似文献
3.
《Journal of Coordination Chemistry》2012,65(13):2341-2352
Eight new copper(II) complexes with halo-aspirinate anions have been synthesized: [Cu2(Fasp)4(MeCN)2]?·?2MeCN (1), [Cu2(Clasp)4(MeCN)2]?·?2MeCN (2), [Cu2(Brasp)4(MeCN)2]?·?2MeCN (3), {[Cu2(Fasp)4(Pyrz)]?·?2MeCN} n (4), {[Cu2(Clasp)4(Pyrz)]?·?2MeCN} n (5), [Cu2(Brasp)4(Pyrz)] n (6), [Cu2(Clasp)4(4,4′-Bipy)] n (7), and [Cu2(Brasp)4(4,4′-Bipy)] n (8) (Fasp: fluor-aspirinate; Clasp: chloro-aspirinate; Brasp: bromo-aspirinate; MeCN: acetonitrile; Pyrz: pyrazine; 4,4′-Bipy: 4,4′-bipyridine). The crystal structure of two 2 and 4 have been determined by X-ray diffraction methods. All compounds have been studied employing elemental analysis, IR, and UV-Visible spectroscopic techniques. The results have been compared with previous data reported for complexes with similar structures. 相似文献
4.
Geng-Chen Li 《Monatshefte für Chemie / Chemical Monthly》2008,139(7):789-792
A simple, efficient and environmentally begin method has been developed for the synthesis of 3-aminopropenones and 3-aminopropenoates
through the reaction of 1,3-dicarbonyl compounds with amines in the presence of Cu(NO3)2 · 3H2O under solvent-free conditions.
Correspondence: Geng-Chen Li, School of Material Science and Engineering, Shijiazhuang Railway Institute, Shijiazhuang 050043,
China. 相似文献
5.
Mitra Ghassemzadeh Samira BahemmatMasoumeh Tabatabaee Salameh NassiriBernhard Neumüller 《Polyhedron》2011,30(11):1760-1766
The synthesis and characterization of three new palladium(II) complexes of 4-amino-6-ethyl-1,2,4-triazine-3-thion-5-one (AETTO, H3L), [PdCl2(H3L)]·H2O (1), [Pd2Cl2(H2L)(PPh3)3]NO3·2CH3CN (2) and [Pd(HL)(PPh3)2] (3), are reported. All the synthesized compounds are air-stable and were characterized by elemental analyses, IR, NMR spectroscopy and mass spectrometry. In addition, the molecular structures of the complexes have been determined by X-ray single crystal diffraction. On the basis of the crystallographic data, the neutral ligand in 1 and the deprotonated ligands in 2 and 3 act as bidentate NS donors. The singly deprotonated ligand in 2 acts as a bridging agent between two metal centers in the binuclear PdII-complex. 相似文献
6.
《Green Chemistry Letters and Reviews》2013,6(1):83-87
A novel one pot and solvent-free synthesis of 2,9,16,23-tetrachloro metal(II)phthalocyanines in microwave using monosodium salt of 4-chlorophthalate as starting material is described. This method in comparison to conventional route offers high yields (75–92%), eliminates the use of toxic organic solvents, reduces multistep synthesis to one-step, reaction temperature from 190 to 120°C, and reaction time from 5–6 hours to 5 minutes. 相似文献
7.
F.J. Barros-García F. Luna-Giles M.A. Maldonado-Rogado E. Viuelas-Zahínos 《Polyhedron》2005,24(18):2972-2980
A new ligand, 2-acetyl-2-thiazoline semicarbazone (ATsc), has been prepared and characterized by a variety of physico-chemical techniques. Likewise, the metal complexes [CuCl2(ATsc)] and [Ni(ATsc)2](NO3)2 · H2O have been isolated and characterized through elemental analysis, IR, UV–Vis–NIR diffuse reflectance and magnetic susceptibility, as well as, in the case of the copper complex, by means of EPR. Moreover, the structures have been determined by X-ray diffraction. In both complexes the Schiff base acts as a tridentate ligand through N(1), N(2) and O atoms, making two five-membered chelate rings. The copper complex consists of monomeric molecules in which the copper atom is five coordinated in a distorted square-pyramidal geometry, with one ATsc and two chlorine ligands. The complex cation of nickel possesses approximately a non-crystallographic C2 symmetry. The environment around the nickel atom may be described as a distorted octahedral geometry with the metallic atom coordinated to two ATsc ligands. 相似文献
8.
9.
Subhra Basak Soma Sen Samiran Mitra C. Marschner W. S. Sheldrick 《Structural chemistry》2008,19(1):115-121
Abstract Two new square planar Cu(II) and Ni(II) complexes, [CuL1(NCO)] (1) and [NiL2(N3)] (2) have been synthesized with two different tridentate N2O donor Schiff base ligands L
1
H (1:1 condensation product of benzoylacetone and 2-diethylaminoethylamine) and L
2
H (1:1 condensation product of benzoylacetone and 2-dimethylaminoethylamine), respectively. Both the complexes 1 and 2 have been characterized by elemental analysis, IR, UV-Vis spectroscopy, room temperature magnetic susceptibility measurement,
electrochemical, thermal, and single crystal X-ray diffraction studies. Structural studies reveal that in both the complexes
metal centers have square planar environment with N2O donor set of Schiff base ligands and terminal pseudohalide anions (isocyanate for 1 and azide for 2) at four coordination sites of square plane.
Graphical abstract
Square planar complexes of Cu(II) and Ni(II) with N
2
O donor set of two Schiff base ligands: synthesis and structural aspects
Subhra Basak, Soma Sen, Samiran Mitra, C. Marschner, W. S. Sheldrick
Two new square planar Cu(II) and Ni(II) complexes, [CuL1(NCO)] (1) and [NiL2(N3)] (2) have been synthesized with two different tridentate N2O donor Schiff base ligands L
1
H and L
2
H respectively. Both the complexes 1 and 2 have been characterized by elemental analysis, IR, UV-Vis
spectroscopy, room temperature magnetic susceptibility measurement, electrochemical, thermal and single crystal X-ray diffraction
studies.
相似文献
10.
Oana Bumbu Cristian Silvestru Michael B Hursthouse 《Journal of organometallic chemistry》2003,687(1):118-124
The reactions between PhHgCl or PhHgAc and M[(XPR2)(YPR′2)N] (M=Na, K; X, Y=O, S; R, R′=Me, Ph, OEt), in 1:1 molar ratio, have been investigated. PhHg[(XPR2)(YPR′2)N] derivatives were isolated as microcrystalline powders and were characterised using IR and NMR (1H, 13C and 31P) spectroscopy and mass spectrometry. The molecular structure of PhHg[(OPR2)(SPPh2)N] [R=Me (1), Ph (2)] was investigated by X-ray diffraction. In the monomeric unit, PhHg[(OPR2)(SPPh2)N], the mercury atom forms the primary bonds with the carbon of the phenyl group and the sulfur atom of the phosphorus ligand [Hg(1)-S(1) 2.405(1) Å for 1, 2.398(2) Å for 2]. These primary bonds are significantly deviated from the expected linear arrangement [C(1)-Hg(1)-S(1) 166.4(2)° for 1, 165.0(2)° for 2]. Both compounds exhibit dimeric associations in the crystal through S,O-bridging organophosphorus ligands [Hg(1)-O(1) 2.556(4) Å for 1, 2.588(4) Å for 2], thus resulting in a distorted T-shaped arrangement of the CHgSO coordination core.. The formation of a 12-membered Hg2O2S2P4N2 ring with different conformation in 1 and 2, respectively, results in different additional chalcogen atoms being in the proximity of the metal atom. Weak transannular Hg?O [2.753(4) Å] are also established in 1, leading to a tricyclic ladder structure with a planar central Hg2O2 ring. 相似文献
11.
Two novel adducts of formula Mn(hfac)2( NITPhCl )2 (1) and [Mn(hfac)2(IMHPhCl)]2(NIT-PhCl)·0.5H2O (2), where hfac = hexafluoroacetylacetonate, NITPhCl = 2-(3-chlorophenyl)-4,4,5,5-tetram-ethylimidazolyl-1-oxyl-3-oxide, IMHPhCl = 2-(3-chlorophenyl)-4, 4, 5, 5-tetramethylimidazolyl-3-oxide, have been prepared by the reaction of Mn(hfac)2·2H2O with NITPhCl. Compound 1 is triclinic, space group P-1with a = 1.3003(3) nm, 6 = 1.3138(3) nm,c = 1.4931 (3) nm, α = 83.74(3)°, β = 77.77(3)°, γ = 60.59(3)°, V=2.171(1)nm3, Z = 2. Compound 2 is triclinic, space group P-1 with a = 1.2994(3) nm, b = 1.4841(3) nm, c = 2.1031 (4) nm, a = 92.30(3)° ,p = 98.68(3)°, γ = 97.89(3)°, V= 3.964(2)nm3, Z = 2. Each manganese atom is hexacoordinated in both compounds and compound 2 is organized inchains by hydrogen bonds between neighboring pairs of NITPhCl and IMHPhCl. 相似文献
12.
13.
《Journal of Coordination Chemistry》2012,65(6):942-951
Two new complexes, trans-[MnL2(NCS)2] (1) and trans-[CoL2(H2O)(EtOH)](ClO4)2?·?H2O (2) with asymmetrical triaryltriazole ligands [L?=?3-(p-chlorophenyl)-4-(p-methylphenyl)-5-(2-pyridyl)-1,2,4-triazole], have been synthesized and characterized by elemental analysis, FT-IR, ESI-MS, and single-crystal X-ray diffraction. In the complexes each L adopts a chelating bidentate mode via the nitrogen of pyridyl and triazole. Both complexes have a similar distorted octahedral core with two NCS? ions in the trans position in 1, while one H2O and one EtOH are present in the axial sites in 2. 相似文献
14.
《Journal of Coordination Chemistry》2012,65(17):3100-3112
A new asymmetrical substituted triazole, 3-phenoxymethyl-4-phenyl-5-(2-pyridyl)-1,2,4-triazole (L) and its complexes, cis-[Cu2 L 2Cl4]·2CH3CN (1) and trans-[CoL 2Cl2]·2H2O·2CH3CN (2), have been synthesized and characterized by IR, single-crystal X-ray diffraction, thermogravimetric analyses and Hirshfeld surfaces. In the structure, two L are mainly stabilized by an intermolecular C–H?N hydrogen bond. In 1 (or 2), each L involves a doubly-bidentate (or chelating bidentate) coordination mode through one pyridine and two nitrogens (or one) of triazole, respectively. Complex 1 has a distorted trigonal bipyramidal [CuN3Cl2] core with two cis Cl? while 2 shows a distorted octahedron [CoN4Cl2] with two trans Cl?. We also prepared molecular Hirshfeld surface and fingerprint plot for L, 1 and 2, which revealed the influence of different metals on coordinate of L. 相似文献
15.
The synthesis and physical properties of bis(2-(1H-imidazol-2-yl)-pyridine)copper(II) with chloride, nitrate and perchlorate as counteranions have been described. Microanalysis, magnetic susceptibility, conductivity and various spectroscopic measurements have been used for the characterization of the complexes. The crystal structures of all three complexes have been determined. Intermolecular hydrogen-bonding interactions and the resulting self-assembly patterns for each of the species have been scrutinized. The chloride containing complex crystallizes as a trihydrate, where the metal ion is in a tetragonally elongated cis-N4Cl2 coordination sphere. This complex provides a three-dimensional honeycomb-like structure through N–H?Cl, O–H?Cl and O–H?O hydrogen bonds. In the nitrate containing species, one of the two counteranions coordinates to the metal centre to provide an irregular N4O2 coordination sphere, while the other counteranion, with the help of a lattice water molecule, assembles a ladder-like structure via N–H?O and bifurcated O–H?O,O hydrogen bonds. A one-dimensional polymeric species has been formed when perchlorate is the counteranion. Here one of the two perchlorates acts as a bridge between the metal centres that are in tetragonally elongated trans-N4O2 coordination spheres. This polymeric chain, together with the second perchlorate and a water molecule, form a ribbon-like structure due to N–H?O and O–H?O hydrogen bonds. 相似文献
16.
《Journal of Coordination Chemistry》2012,65(2):243-249
A ligand 1,3-bis(1-benzylbenzimidazol-2-yl)-2-oxopropane (Bobb) and the zinc(II) complex, [Zn(Bobb)2](picrate)2 · 2DMF, were synthesized and characterized by elemental analyses, electrical conductivities, IR, and UV. The crystal structures of the ligand and the zinc complex have been determined by single crystal X-ray diffraction. The ligand displays a V-shaped configuration and the Zn(II) cation is six-coordinate by four nitrogens and two oxygens from Bobb. The N4O2 donor set is a distorted octahedron. 相似文献
17.
Hong Liu Lin Xu Guang-Gang Gao Yan-Yan Yang Yu Sun 《Journal of solid state chemistry》2007,180(5):1664-1671
Reaction of Keggin polyoxotungstate with copper(II)-EDTA (EDTA=ethylenediamine tetraacetate) complex under mild conditions led to the formation of hybrid inorganic-organic compounds Na4(OH)[(Cu2EDTA)PW12O40]·17H2O (1) and Na4[(Cu2EDTA)SiW12O40]·19H2O (2). The single-crystal X-ray diffraction analyses reveal their two structural features: (1) one-dimensional chain structure consisting of Keggin polyoxotungstate and copper(II)-EDTA complex; (2) Two-dimensional layer architecture assembled by the one-dimensional chain structure and sodium linker. The results of magnetic measurements in the temperature range 300-2 K indicated the existence of ferromagnetic exchange interactions between the CuII ions for both compounds. In addition, TGA analysis, IR spectra, and electrochemical properties were also investigated to well characterize these two compounds. 相似文献
18.
19.
A simple, efficient and practical procedure for the Biginelli reaction using strontium(II) triflate [Sr(OTf)2] as a novel catalyst is described under solvent-free conditions in high yields. The catalyst exhibited remarkable reactivity and it is reusable. Some of dihydropyrimidiones showed strong pesticidal activity. 相似文献
20.
Ram C. Besra 《Tetrahedron letters》2005,46(37):6213-6217
Copper(II) tetrafluoroborate hydrate is a new and extremely efficient catalyst for 1,3-dithiolane/dithiane formation from aromatic, heteroaromatic and aliphatic aldehydes and cyclic saturated ketones in 1-5 min under solvent-free conditions at room temperature. The reaction is compatible with other functionalities such as ether, ester, hydroxyl, halide, nitro and cyano groups and exhibits excellent chemoselectivity. α,β-Unsaturated aldehydes/ketones lead to selective formation of 1,3-dithiolanes instead of Michael addition products. For substrates bearing an aldehyde and a ketone carbonyl group, chemoselective dithiolane formation takes place with the aldehyde. 相似文献