共查询到20条相似文献,搜索用时 31 毫秒
1.
A novel organic-inorganic hybrid pentaborate [Ni(C4H10N2)(C2H8N2)2][B5O6(OH)4]2 has been synthesized by hydrothermal reaction and characterized by FT-IR, Raman spectroscopy, elemental analyses and DTA-TGA. Its crystal structure was determined from single crystal X-ray diffraction. The structure consists of isolated polyborate anion [B5O6(OH)4]− and nickel complex cation of [Ni(C4H10N2)(C2H8N2)2]2+, in which the two kinds of ligands come from the decomposition of triethylenetriamine material. The [B5O6(OH)4]− units are connected to one another through hydrogen bonds, forming a three-dimensional framework with large channel along the a and c axes, in which the templating [Ni(C4H10N2)(C2H8N2)2]2+ cations are located. The assignments of the record FT-IR absorption frequencies and Raman shifts were given. 相似文献
2.
A new aluminoborate, [C5H6N][AlB12O14(OH)12], has been hydrothermally synthesized at 200 °C. The single-crystal diffraction study reveals that it crystallizes in space group C2/c. It consists of aluminoborate clusters [AlB12O14(OH)12]− and counterions [C5H6N]+. The aluminoborate cluster contains an Al(OH)6 octahedron as a core that is capped by two raft-like polyborate units [B6O7(OH)6]. These clusters are further interlinked by extensive hydrogen bonding to form a three-dimensional (3D) network, containing large channels along the b-axis, in which the [C5H6N]+ cations are located. 相似文献
3.
Thomas Schölkopf 《Inorganica chimica acta》2011,374(1):181-186
The orthorhombically crystallizing salts Rb2[B12(OH)12]·2H2O (a = 1576.81(9), b = 813.08(5), c = 1245.32(7) pm) and Rb2[B12(OH)12]·2H2O2 (a = 1616.54(9), b = 814.29(5), c = 1260.12(7) pm) could be prepared from Rb2[B12H12] and hydrogen peroxide. Both crystal structures were determined by X-ray single crystal diffraction and refined in the space group Cmce. They are not isostructural to the other compounds containing icosahedral dodecahydroxo-closo-dodecaborate dianions [B12(OH)12]2− and potassium, rubidium or cesium cations already known to literature, but both title compounds crystallize quasi-isotypically exhibiting Rb+ cations in 10-fold oxygen coordination. The hydrogen peroxide adduct (Rb2[B12(OH)12]·2H2O2) is explosive on shock and heat, while the hydrate (Rb2[B12(OH)12]·2H2O) is not. 相似文献
4.
Reaction of [Ru2(O2CMe)4]Cl with K3[Cr(CN)5NO] in water forms Hx[RuII/III2(O2CMe)4]3−x-[Cr(CN)5NO]·zH2O (x = 0.2) that magnetically orders at 4.0 K and possesses an interpenetrating body centered cubic [a = 13.2509(2) Å] structure with random locations of the bridging nitrosyl ligands, and x/3 vacant cation sites. Similarly, the aqueous reaction of [Ru2(O2CMe)4]Cl with Na2[Fe(CN)5NO] forms paramagnetic [Ru2(O2CMe)4]2[Fe(CN)5NO]·H2O, which has a similar tetragonal interpenetrating structure [a = 13.0186(1) Å, c = 13.0699(2) Å] where the NO ligands are presumably nonbridging and 1/3 of the expected cation sites are unoccupied. The presence of uncoordinated NO sites in addition to missing neighboring [Ru2(O2CMe)4]+ units, results in significant vacancies (or holes) in the lattice. 相似文献
5.
Monika Moszner 《Inorganica chimica acta》2004,357(12):3613-3620
The decaaqua-di-rhodium(II) cation has been found to be an interesting starting material in the preparation of dioxygen complexes with different N-donor ligands. Treatment of aqueous HClO4 solution of [Rh2(H2O)10]4+ with NH4OH/NH3, py and/or en results in water exchange and the formation of corresponding [Rh2II(H2O)10−m(base)n(OH)m](4−m)+ derivatives. Reaction of the latter with dioxygen afforded superoxo and/or peroxo complexes, depending on reaction conditions: [Rh2III(O2 −)(NH3)8(OH)2](ClO4)3 (1), [Rh2III(O2 −)(NH3)8(OH)(H2O)](ClO4)4 (2), [Rh2III(O2 2−)(NH3)10](ClO4)4 · 6H2O (3), [Rh2III(O2 −)(py)8(H2O)2](ClO4)5 (4), [Rh2III(O2 2−)(en)4(H2O)2](ClO4)4 (5) and [Rh2III(O2 −)(en)4(H2O)2](ClO4)5 (6). All the obtained complexes were characterized by elemental analysis, mass spectrometry, UV-Vis, IR and ESR spectroscopies and magnetic measurements. 相似文献
6.
《Inorganica chimica acta》1988,142(1):59-67
Cyclic voltammograms of cis-diammineplatinum α-pyrrolidone-blue and -tan, [Pt4(NH3)8(C4H6NO)4]n+ (n = 5 and 6, respectively) show for either complex only one redox peak at 0.53 V (average potential of the anodic and cathodic peak potentials). Coulometry and UVVis spectra of bulk- electrolyzed solution indicated that the redox peak corresponds to the reaction [Pt4(NH3)8(C4H6NO)4]8+ + 4e ⇄ 2[Pt2(NH3)4(C4H6NO)2]2+. When cyclic voltammetry is carried out in a solution of [Pt4(NH3)8(C4H6NO)4]6+ or a platinum electrode adsorbed with [Pt4(NH3)8(C4H6NO)4]6+ is used in the presence of oxidizing agent in the solution, O2 gas generates from the electrode surface with large catalytic cathodic current at potentials below ca. 0.8 V. The O2 gas was confirmed to generate from water by GC-MS analysis. This abnormal O2 generation phenomenon is explained with cyclic reactions of chemical surface oxide formation on the electrode by the oxidizing agent and electrochemical reduction of the surface oxide. Oxygen gas generates from the reaction of [Pt4(NH3)8(C4H6NO)4]8+ or [Pt4(NH3)8(C4H6NO)4]6+ with OH− produced in the course of the electrochemical reduction of the electrode surface oxide. The ability of [Pt4(NH3)8(C4H6NO)4]8+ and [Pt4(NH3)8(C4H6NO)4]6+ to oxidize OH− into O2 has been reported previously. 相似文献
7.
Vadapalli Chandrasekhar Palani Sasikumar Tapas Senapati Atanu Dey 《Inorganica chimica acta》2010,363(12):2920-2928
The reaction of Cu(II) or Cd(II) salts with 2,4,6-iPr3C6H2PO3H2, 2,4,6-iPr3C6H2CH2PO3H2 or 2,6-iPr2C6H3OPO3H2 in the presence of strong chelating nitrogen ligands such as 2,2′-bipyridine (bpy), 1,10-phenanthroline (phen), 2-pyridylpyrazole (pypz) or 3,5-dimethyl pyrazole (dmpz) as the ancillary ligands afforded dinuclear copper or cadmium complexes [Cu2(2,4,6-iPr3C6H2PO3H)4(bpy)2] (4), [Cu2(2,6-iPr2C6H3OPO3H)2(bpy)2(OAc)2(CH3OH)2]·(CH3OH) (5), [Cd2(2,6-iPr2C6H3OPO3H)4 (bpy)2(CH3OH)2]·2(CH3OH) (6), [Cd2(2,6-iPr2C6H3OPO3H)4(phen)2] (7), [Cu2(2,6-iPr2C6H3OPO3H)2(PyPz)2(CH3OH)2] (8) and [Cu2(2,4,6-iPr3C6H2CH2PO3H)2(DMPz)2Cl2]·(CH3OH) (9) The molecular structures of 4-7 are grossly similar. The common structural features in these complexes are that the two metal centers are bridged by two bidentate [RPO2(OH)]− ligands generating a central eight-membered ring. Each of the metal centers also contains a chelating nitrogen ligand and a monodentate phosphonate or a phosphate ligand. In 5 and 6 other terminal ancillary ligands are also present. In compound 8, each of the two copper centers contains a monodentate [RPO2(OH)]− ligand along with a molecule of methanol. The two coppers are bridged by two monoanionic pyridylpyrazole ligands. The molecular structure of 9 is similar to that of 4-7. However, in 9 each of the two copper centers contain only terminal monodentate ligands in the form of two chlorides and a pyrazole. Magnetic studies on all of these copper complexes reveal an anti-ferromagnetic behavior at low temperatures. In addition, these complexes were found to be artificial nucleases and can convert supercoiled pBR322 DNA form I into nick form II in 1 min in the presence of an external oxidant through a hydrolytic and/or an oxidative pathway. 相似文献
8.
Phosphonium zwitterions of a known type were obtained in high yield via a 1:1 reaction of p-benzoquinone or methoxy-p-benzoquinone with the tertiary phosphines R3P [R = (CH2)3OH, Ph, Et, Me] and Ph2MeP, in acetone or benzene at room temperature. In all cases, attack of the P-atom occurs at a C-atom rather than at an O-atom. The products were characterized to various degrees by elemental analysis, 31P{1H}, 1H and 13C NMR spectroscopies, and mass spectrometry, and two of the zwitterions, the new [HO(CH2)3]3P+C6H2(O−)(OH)(MeO) and the known Ph3P+C6H3(O−)(OH), were structurally characterized by X-ray analysis. The PEt3 reaction also produces small amounts of the ‘dimeric’, μ-oxo co-product Et3P+C6H2(O−)(OH)-O-C6H3(O−)P+Et3 that is tentatively characterized by 1D- and 2D-NMR data. 2,5-Di-tert-butyl- and 2,3,5,6-tetramethyl-p-benzoquinone do not react with [HO(CH2)3]3P under the conditions noted above. Heating D2O solutions of the water-soluble zwitterions R3P+C6H3(O−)(OH) [R = (CH2)3OH, Et] at 90 °C for 72 h leads to complete H/D exchange of the H-atom in the position ortho to the phosphonium center. 相似文献
9.
Wen-Feng Liaw Chung-Hung HsiehShie-Ming Peng Gene-Hsiang Lee 《Inorganica chimica acta》2002,332(1):153-159
The SS bond-activation of diorganyl disulfide by the anionic metal carbonyl fragment [Mn(CO)5]− gives rise to an extensive chemistry. Oxidative decarbonylation addition of 2,2′-dithiobis(pyridine-N-oxide) to [Mn(CO)5]−, followed by chelation and metal-center oxidation, led to the formation of [MnII(SC5H4NO)3]− (1). The effective magnetic moment in solid state by SQUID magnetometer was 5.88 μB for complex 1, which is consistent with the MnII having a high-spin d5 electronic configuration in an octahedral ligand field. The average Mn(II)S, SC and NO bond lengths of 2.581(1), 1.692(4) and 1.326(4) Å, respectively, indicate that the negative charge of the bidentate 1-oxo-2-thiopyridinato [SC5H4NO]− ligand in complex 1 is mainly localized on the oxygen atom. The results are consistent with thiolate-donor [SC5H4NO]− stabilization of the lower oxidation state of manganese (Mn(I)), while the O,S-chelating [SC5H4NO]− ligand enhances the stability of manganese in the higher oxidation state (Mn(II)). Activation of SS bond as well as OH bond of 2,2′-dithiosalicylic acid by [Mn(CO)5]− yielded [(CO)3Mn(μ-SC6H4C(O)O)2Mn(CO)3]2− (4). Oxidative addition of bis(o-benzamidophenyl) disulfide to [Mn(CO)5]− resulted in the formation of cis-[Mn(CO)4(SR)2]− (R=C6H4NHCOPh) which was employed as a chelating metallo ligand to synthesize heterotrinuclear [(CO)3Mn(μ-SR)3Co(μ-SR)3Mn(CO)3]− (8) possessing a homoleptic hexathiolatocobalt(III) core. 相似文献
10.
The synthesis and crystal structure of four new copper(I) and copper(II) supramolecular amine, and amine phosphonate, complexes is reported. Reaction of copper(I) with 2-,9-dimethyl-1-10-phenanthroline (dmp) produced a stable 4-coordinate Cu(I) species, [Cu(I)(dmp)2]Cl · MeOH · 5H2O (2), i.e., the increased steric hindrance in the ‘bite’ area of dmp did not prevent interaction with the metal and provided protection against oxidation which was not possible for the phen analogue [R. Clarke, K. Latham, C. Rix, M. Hobday, J. White, CrystEngCommun. 7(3) (2005), 28-36]. Subsequent addition of phenylphosphonic acid to (2) produced two structures from alternative synthetic routes. An ‘in situ’ process yielded red block Cu(I) crystals, [Cu(I)(dmp)2] · [C6H5PO3H2 · C6H5PO3H] (4), whilst recrystallisation of (2) prior to addition of the acid (‘stepwise’ process) produced a green, needle-like Cu(II) complex, [Cu(II)(dmp) · (H2O)2 · C6H5PO2(OH)] [C6H5PO2(OH)] (3). However, addition of excess dmp during the ‘stepwise’ process forced the equilibrium towards product (4) and resulted in an optimum yield (99%). The structure of (4) was similar to the phen analogue, [Cu(II)Cl(phen)2] · [C6H5PO2(OH) · C6H5PO(OH)2] (1) [R. Clarke, K. Latham, C. Rix, M. Hobday, J. White, CrystEngCommun. 7(3) (2005), 28-36], but the presence of dmp exerted some influence on global packing, whilst (3) exists as a polymeric layered material. In contrast, reaction of copper(I) with di-2-pyridyl ketone (dpk), followed by phenylphosphonic acid produced purple/blue Cu(II) species, [Cu(II)(dpk · H2O)2] Cl2 · 4H2O (5), and [Cu(II)(dpk · H2O)2] · [C6H5PO2(OH)2 · C6H5PO(OH)2] (6), respectively, i.e., in both cases oxidation of copper occurred. Solid-state luminescence was observed in (2) and (4). The latter showing a 5-fold enhancement in intensity. 相似文献
11.
Maura Pellei Mercedes Camalli Giancarlo Gioia Lobbia Grazia Papini Carlo Santini 《Inorganica chimica acta》2008,361(5):1456-1462
Copper(I) complexes have been synthesized from the reaction of CuCl, monodentate tertiary phosphines PR3 (PR3 = P(C6H5)3; P(C6H5)2(4-C6H4COOH); P(C6H5)2(2-C6H4COOH); PTA, 1,3,5-triaza-7-phosphaadamantane; P(CH2OH)3, tris(hydroxymethyl)phosphine) and lithium bis(3,5-dimethylpyrazolyl)dithioacetate, Li[LCS2]. Mono-nuclear complexes of the type [LCS2]Cu[PR3] have been obtained and characterized by elemental analyses, FT-IR, ESI-MS and multinuclear (1H, 13C and 31P) NMR spectral data; in these complexes the ligand behaves as a κ3-N,N,S scorpionate system. One exception to this stoichiometry was observed in the complex [LCS2]Cu[P(CH2OH)3]2, where two phosphine co-ligands are coordinated to the copper(I) centre. The solid-state X-ray crystal structure of [LCS2]Cu[P(C6H5)3] has been determined. The [LCS2]Cu[P(C6H5)3] complex has a pseudo tetrahedral copper site where the bis(3,5-dimethylpyrazolyl)dithioacetate ligand acts as a κ3-N,N,S donor. 相似文献
12.
Two new zinc phosphonates with 2-hydroxyphosphonoacetic acid (HPAA) and 1-hydroxyethylidenediphosphonic acid (hedpH4), [Zn2{HO3PCH(OH)CO2}3]·2NH2(CH3)2·3H2O (1) and [Zn3{CH3C(OH)(PO3)2}2]·2NH2(CH3)2·H2O (2) have been synthesized under mixed-solvothermal conditions at 160 °C and structurally characterized by X-ray single-crystal diffraction, X-ray powder diffraction, infrared spectroscopy and elemental analysis. The structure of compound 1 comprises Zn1O6 and Zn2O6 octahedra connected by [HO3PCH(OH)CO2]2− to form a 2D layered structure with one-dimensional channel system along c-axis direction, and the protonated dimethylamine cations are being located between two adjacent layers. Interestingly the layers of 1 arranged in an alternative sequence (ABAB). Compound 2 features a 3D framework structure with channels along the b- and c-axis, respectively. The charge-compensating protonated Hdma+ cations and solvate water molecules are located inside the channels along the c-axis. A notable feature for compound 2 is the presence of the alternate left- and right-handed helical chains in the structure. The luminescence properties of compounds 1 and 2 have also been studied. 相似文献
13.
Tai-Nan Chen Ming-Li Tsai Ming-Hsi Chiang Wen-Feng Liaw 《Inorganica chimica acta》2006,359(8):2525-2533
[PPN][Se5Fe(NO)2] (1) and [K-18-crown-6-ether][S5Fe(NO)2] (2′) were synthesized and characterized by IR, UV-Vis, EPR spectroscopy, magnetic susceptibility, and X-ray structure. [PPN][Se5Fe(NO)2] easily undergoes ligand exchange with S8 and (RS)2 (R = C7H4SN (5), o-C6H4NHCOCH3 (6), C4H3S (7)) to form [PPN][S5Fe(NO)2] and [PPN][(SR)2Fe(NO)2]. The reaction displays that [E5Fe(NO)2]− (E = Se (3), S (4)) facilely converts to [Fe4E3(NO)7]− by adding acid HBF4 or oxidant [Cp2Fe][BF4] in THF, respectively. Obviously, complexes 1 and 2′ serve as the precursors of the Roussin’s black salts 3 and 4. The electronic structure of {Fe(NO)2}9 core of [Se5Fe(NO)2]− is best described as a dynamic resonance hybrid of {Fe+1(NO)2}9 and {Fe−1(NO+)2}9 modulated by the coordinated ligands. The findings, EPR signal of g = 2.064 for 1 at 298 K, implicate that the low-molecular-weight DNICs and protein-bound DNICs may not exist with selenocysteine residues of proteins as ligands, since the existence of protein-bound DNICs and low-molecular-weight DNICs in vitro has been characterized with a characteristic EPR signal at g = 2.03. In addition, complex 2′ treated human erythroleukemia K562 cancer cells exposed to UV-A light greatly decreased the percentage survival of the cell cultures. 相似文献
14.
The preparation and variable temperature-magnetic investigation of three squarate-containing complexes of formula [Fe2(OH)2(C4O4)2(H2O)4]·2H2O (1) [Cr2(OH)2(C4O4)2(H2O)4]·2H2O (2) and [Co(C4O4)(H2O)4]n (3) [H2C4O4 = 3.4-dihydroxycyclobutene-1,2-dione (squaric acid)] together with the crystal structures of 1 and 3 are reported. Complex 1 contains discrete centrosymmetric [Fe2(OH)2(C4O4)2(H2O)4] diiron(II) units where the iron pairs are joined by a di-μ-hydroxo bridge and two squarate ligands acting as bridging groups through adjacent oxygen atoms. Two coordinated water molecules in cis position complete the octahedral environment at each iron atom in 1. The iron-iron distance with the dinuclear unit is 3.0722(6) Å and the angle at the hydroxo bridge is 99.99(7)°, values which compare well with the corresponding ones in the isostructural compound 2 (2.998 Å and 99.47°) whose structure was reported previously. The crystal structure of 3 contains neutral chains of squarato-O1,O3-bridged cobalt(II) ions where four coordinated water molecules complete the six-coordination at each cobalt atom. The cobalt-cobalt separation across the squarate bridge is 8.0595(4) Å. A relatively important intramolecular antiferromagnetic coupling occurs in 1 whereas it is very weak in 2, the exchange pathway being the same [J = −14.4 (1) and −0.07 cm−1 (2), the spin Hamiltonian being defined as ]. A weak intrachain antiferromagnetic interaction between the high-spin cobalt(II) ions occurs in 3 (J = −0.30 cm−1). The magnitude and nature of these magnetic interactions are discussed in the light of their respective structures and they are compared with those reported for related systems. 相似文献
15.
Reaction of vanadium(III) chloride with 8-quinolinol (Hqn) gave a mononuclear vanadium(IV) complex, [VOCl2(H2O)2] 1) · 2H2qn · 2Cl · CH3CN, and three dinuclear vanadium(IV) complexes: [V2O2Cl2(qn)2(H2O)2] (2) · Hqn, [V2O2Cl2(qn)2(C3H7OH)2] (3), and [V2O2Cl2(qn)2(C4H9OH)2] (4). Reaction of vanadium(III) chloride with 5-chloro-8-quinolinol (HClqn) gave four dinuclear vanadium(IV) complexes: [V2O2Cl2(Clqn)2(H2O)2] (5) · 2HClqn, [V2O2Cl2(Clqn)2(C3H7OH)2] (6), [V2O2Cl2(Clqn)2(C6H5CH2OH)2] (7), and [V2O2Cl2(Clqn)2(C4H9OH)2] (8) · 2C4H9OH. Reaction of vanadium(III) chloride with 5-fluoro-8-quinolinol (HFqn) gave two dinuclear vanadium(IV) complexes: [V2O2Cl2(Fqn)2(H2O)2] (9) · HFqn · 2H2O and V2O2Cl2(Fqn)2(C3H7OH)2] (10). X-ray structures of 1 · 2H2qn · 2Cl · CH3CN, 3, 4, 6, 7, 8 · 2 t-BuOH, and 10 have been determined. As to the mononuclear species 1 · 2H2qn · 2Cl · CH3CN, coordination of Hqn to vanadium does not occur, but protonation to Hqn occurs to give H2qn+, which links 1’s through hydrogen bonding, while each of the dinuclear species has a terminal and a bridging qn (or Clqn, Fqn) ligand, giving rise to a (V-O)2 ring. Magnetic measurements of 3, 4, 6, 7, and 10 in solid form show very weak antiferromagnetic behavior, and the effective magnetic moments are close to spin only value (2.44) of d1-d1 system, while ESR of 3 in THF shows dissociation to monomeric species. Change from mononuclear, 1, to dinuclear, 2, species was followed by the change of electronic spectrum. 相似文献
16.
The dinuclear and trinuclear copper(II) complexes [Cu2(L)(OH)(ClO4)(phen)(H2O)]ClO4 · [Cu2(L)(OH)(ClO4)2(phen)(CH3OH)] (1) and [Cu3(L)2(OH)2(H2O)2](NO3)2 (2) (HL=2-[2-(α-pyridyl)ethyl]imino-3-butanone oxime and phen=1,10-phenanthroline) were prepared and their crystal structures have been determined by X-ray crystallography. Complex 1 is composed of [Cu2(L)(OH)(ClO4)(phen)(H2O)]ClO4 (1a) and [Cu2(L)(OH)(ClO4)2(phen)(CH3OH)] (1b). In 1a and 1b, one oximato of L and one hydroxo group bridge two copper(II) ions. The linear trinuclear cation [Cu3(L)2(OH)2(H2O)2]2+ in 2 is centrosymmetric, and one oximato and one hydroxo group bridge the central and terminal copper(II) ions. The strong antiferromagnetic interactions within the dinuclear and trinuclear complexes 1 and 2 have been observed (2J=∼−900 cm−1 for 1 and 2, respectively, H=−2JS1·S2). 相似文献
17.
Carlos Bustos Desmond Mac-Leod Carey René Thouvenot Pierre Gouzerh 《Inorganica chimica acta》2010,363(15):4262-4268
A series of aryldiazenido polyoxomolybdates of the type (nBu4N)2[Mo5O13(OMe)4(NNAr){Na(MeOH)}] (Ar = C6F5, 1; Ar = O2N-o-C6H4, 2; Ar = O2N-m-C6H4, 3; Ar = O2N-p-C6H4, 4a; Ar = (O2N)2-o,p-C6H3, 5) have been obtained by controlled degradation of the parent compounds (nBu4N)3[Mo6O18(NNAr)] with NaOH in methanol. They have been characterized by elemental analysis and UV-Vis and IR spectroscopy. In addition, 4a has been characterized by 95Mo NMR spectroscopy and the crystal structure of (nBu4N)2[Mo5O13(OMe)4(NNC6H4-p-NO2){Na(H2O))]·H2O (4b) has been determined by X-ray diffraction. The molecular structure of the anion of 4b features a lacunary Lindqvist-type anion [Mo5O13(OMe)4(NNC6H4-p-NO2)]3− interacting with a sodium cation through the four terminal axial oxygen atoms. The 1:1 sodium complexes react with BaCl2 and BiCl3 to yield 2:1 complexes which have been isolated as (nBu4N)4[Ba{Mo5O13(OMe)4(NNAr)}2] (Ar = C6F5, 6; Ar = O2N-p-C6H4, 7) and (nBu4N)3[Bi{Mo5O13(OMe)4(NNAr)}2] (Ar = C6F5, 8; Ar = O2N-p-C6H4, 9). X-ray crystallography analysis of 9·Me2CO has shown that the tetradentate [Mo5O13(OMe)4(N2C6H4-p-NO2)]3− anions provide a square-antiprismatic environment for Bi. In contrast, IR spectroscopy provides evidence for a square-prismatic environment of Ba in 6 and 7. In acetonitrile-methanol mixed solvent, [Mo5O13(OMe)4(NNAr)]3− and [PW11O39]7−, generated in situ by alkaline degradation of their respective parents, [Mo6O18(NNAr)]3− and [PW12O40]3−, react together to give the Keggin-type diazenido compounds (nBu4N)4[PW11O39(MoNNAr)] (Ar = O2N-o-C6H4, 10; Ar = O2N-m-C6H4, 11; Ar = O2N-p-C6H4, 12), which have been characterized by 31P and 183W NMR spectroscopy. 相似文献
18.
The complexes [Re{MeN(CH2CH2O)(CH2CH2OH)-κ3N,O,O}(CO)3] (1), [Re{N(CH2CH2O)(CH2CH2OH)2-κ3N,O,O}(CO)3] (2), [Me3NH]2[(OC)3Re{N(CH2CO2)2-κ3N,O,O}CH2CH2{N(CH2CO2)2-κ3N,O,O}Re(CO)3] (3), [Me3NH]2[Re2{μ2-2,6-(O2C)2(C5H3N)-κ3N,O,O}2(CO)6] (4) and [Re2{μ2-2,6-(OCH2)(C5H3N)(CH2OH)-κ2N,O}2(CO)6] (5) were synthesized in high yields via the reactions of [Re2(CO)10] and Me3NO with MeN(CH2CH2OH)2, N(CH2CH2OH)3, EDTA, pyridine-2,6-dicarboxylic acid and pyridine-2,6-dimethanol, respectively. Complexes 1-5 were characterized by IR and 1H NMR spectroscopy, elemental analysis and X-ray crystallography. 相似文献
19.
Cobalt(II) complexes of sulfadiazine formulated as [Co(C10H9N4O2S)2(CH3OH)2] and [Co(C10H9N4S)2(H2O)2] have been synthesized and characterized by elemental analysis, infrared and UV-Vis spectroscopy and magnetic susceptibility measurements. The crystal structures of the complex [Co(C10H9N4O2S)2(CH3OH)2] and of free sulfadiazine are also reported. The cobalt complex and the sulfadiazine ligand both crystallize in the monoclinic space group, P21/c, with sulfadiazine acting as a bidentate ligand. Cobalt is coordinated to two-sulfonamide nitrogen and the pyrimidine nitrogen of the sulfadiazine. Two molecules of methanol complete the octahedral geometry around the cobalt, with interligand hydrogen bonding between methanol and sulfadiazine. Infrared spectroscopy confirmed the presence of water molecule in the coordination sphere of [Co(C10H9N4S)2(H2O)2]. The electronic spectra and magnetic moments of both complexes were similar, indicating that both complexes have similar structure. 相似文献
20.
Via self-assembly of the molecular precursors sodium orthovanadate and isopropyltin-dihydroxide-chloride the unprecedented organic-inorganic hybrid polyoxoanion [(iPrSn)3(OV)4O10(OH)3]2− was synthesized in dimethylsulfoxide (DMSO) and isolated as its sodium salt Na2[(iPrSn)3(OV)4O10(OH)3]·5H2O·3DMSO. This spherical nanosized anion is composed of two different structural subunits, a well-known trinuclear monoorganotin-polyoxo-hydroxo unit with octahedrally coordinated tin atoms and a new open-chain, branched isopolyoxo tetravanadate(V) with tetrahedrally coordinated vanadium atoms. 相似文献