42879-93-6Relevant academic research and scientific papers
Characterization of mechanochemically synthesized imidazolates of Ag+1, Zn+2, Cd+2, and Hg+2: Solid state reactivity of nd10 cations
Fernández-Bertrán,Hernández,Reguera,Yee-Madeira,Rodriguez,Paneque,Llopiz
, p. 1612 - 1617 (2006)
Silver, zinc, cadmium, and mercury imidazolates have been synthesized mechanochemically by milling imidazole and the metal oxides in an agate mortar. The reaction products were characterized by FTIR and XRPD techniques. The results obtained for the mechanochemical imidazolates have been compared with those obtained by precipitation reported in the literature. The mechanochemical Ag imidazolate has the same orthorhombic crystal structure as the precipitated one. The mechanochemical Zn imidazolate has a tetragonal structure with similar crystal parameters to those of Zn(Imz)2H2O, but no water molecules are present in the structure. This new anhydrous form is a polymorph of the one obtained by precipitation. The mechanochemical Cd imidazolate has a monoclinic structure which is the polymorph of the precipited orthorombic form. The mechanochemical Hg imidazolate presents a hexagonal structure which is a polymorph of the orthorombic structure obtained by precipitation. The influence of the nd10 electronic configuration of the cations on the mechanochemical reaction is discussed.
Chemical Reactions of Imidazole with Metallic Silver Studied by the Use of SERS and XPS Techniques
Xue, Gi,Dai, Quinpin,Jiang, Shuangen
, p. 2393 - 2395 (1988)
Chemical reactions of imidazole with metallic silver have been studied by surface-enhanced Raman scattering (SERS), infrared (IR), and X-ray photoelectron spectroscopy (XPS) techniques.We found that imidazole can react with metallic silver directly in the presence of oxygen.The product formed is (imidazolato)silver(I), which covers the surface of metal as a monolayer.The reaction scheme and the structural features of the product are discussed.
Imidazole complexes of nickel(II), copper(II), zinc(II), and silver(I)
Bauman Jr., John E.,Wang, James C.
, p. 368 - 373 (1964)
The site of complex formation of the imidazole molecule has been determined to be the pyridine nitrogen by comparing data on the N-methylimidazole complex with the imidazole complex of Ag(I). The preparation and characterization of a dual system of imidazole and imidazolate complexes is presented for Ni(II), Cu(II), Zn(II), and Ag(I). Total heats of formation of these complexes have been determined.
Powder Route to Crystal Structures: X-Ray Powder Diffraction Determination of Polymeric Silver Imidazolate
Masciocchi, Norberto,Moret, Massimo,Cairati, Paolo,Sironi, Angelo,Ardizzoia, G. Attilio,Monica, Girolamo La
, p. 1671 - 1676 (1995)
Silver imidazolate has been synthesized and its solid-state structure determined, ab initio, from conventional X-ray powder diffraction data only.The crystals are orthorhombic, space group P212121, with a = 5.5759(4), b = 6.7452(4), c = 22.174(1) Angstroem, U = 834.0(1) Angstroem3, Z = 8, Dc = 2.786 g cm-3.The structure was solved by a real-space scavenger technique and refined by the Rietveld method down to Rp and RF values of 0.062 and 0.027, respectively, for 4401 data points (1262 reflections) measured at room temperature in the 17-105 deg (2θ) range.The crystal structure of n> (Him = imidazole) consists of a complex packing of polymeric chains folding about the crystallographic c axis, containing linearly co-ordinated silver atoms joined by imidazolate fragments.Short interchain Ag...Ag contacts were observed.
Synthesis, crystal structure and characterization of two polymeric silver(I) complexes containing imidazolate anions
Liu, Xiu-Ying,Zhu, Hai-Liang
, p. 155 - 159 (2005)
Two new imidazolate-containing complexes, [Ag5(Im) 5]n (1) and [Ag(2-MeIm)]n (2), were prepared and characterized by X-ray single crystal structure determination. (1) consists of 1-D chains running along three different directions, namely [2 1 1], [2 1 1] and [2 1 1]. This type of packing of chains is unusual. The chains are linked to form a three-dimensional structure through weak Ag...Ag interactions. The silver(I) atom in each chain is linearly coordinated by two nitrogen atoms from different imidazolates and the 1-D chain is somewhat helical due to the geometrical constraints imposed by the 1,3-arrangement of the nitrogen atoms in the imidazolate bridges. (2) is a linear chain in which each silver(I) atom is two-coordinated with the different bridged methylimidazolate nitrogen atoms. The two structures were refined to R1 = 0.0315 for (1) and R1 = 0.0495 for (2). Complexes (1) and (2) are sparingly soluble and very stable in CH3CN containing 0.1 mol·L-1 of n-Bu 4NBF4 in the range 2.0 to -2.0 V at room temperature and do not undergo any redox process. When being boiled in a solution of 30% sodium hydroxide for two hours, the large colorless prismatic crystals of (1) and (2) remain unchanged. TG/DTG analyses shows that the two complexes begin to decompose at 382°C for (1) and 357°C for (2). Copyright
Synthesis and Characterization of cyclo-Pentazolate Salts of NH4+, NH3OH+, N2H5+, C(NH2)3+, and N(CH3)4+
Yang, Chen,Zhang, Chong,Zheng, Zhansheng,Jiang, Chao,Luo, Jun,Du, Yang,Hu, Bingcheng,Sun, Chengguo,Christe, Karl O.
, p. 16488 - 16494 (2018)
A breakthrough in polynitrogen chemistry was recently achieved by our bulk synthesis of (N5)6(H3O)3(NH4)4Cl in which the cyclo-pentazolate anions were stabilized extensively by hydrogen bridges with the NH4+ and OH3+ cations. Significant efforts have been carried out to replace these nonenergetic cations and the Cl- anion by more energetic cations. In this paper, the metathetical syntheses of cyclo-pentazolate salts containing the simple nitrogen-rich cations NH4+, NH3OH+, N2H5+, C(NH2)3+, and N(CH3)4+ are reported. These salts were characterized by their crystal structures; vibrational, mass, and multinuclear NMR spectra; thermal stability measurements; sensitivity data; and performance calculations. It is shown that the cyclo-pentazolates are more energetic than the corresponding azides but are thermally less stable decomposing in the range of 80 °C to 105 °C. As explosives, the hydrazinium and hydroxyl ammonium salts are predicted to match the detonation pressure of RDX but exhibit significantly higher detonation velocities than RDX and HMX with comparable impact and friction sensitivities. Although the ammonium salt has a lower detonation pressure than RDX, its detonation velocity also exceeds those of RDX and HMX. As a rocket propellant, the hydrazinium and hydroxyl ammonium salts are predicted to exceed the performances of RDX and HMX. The crystal structures show that the cyclo-pentazolate anions are generally stabilized by hydrogen bonds to the cations, except for the N(CH3)4+ salt which also exhibits strong cation- interactions. This difference in the anion stabilization is also detectable in the vibrational spectra which show for the N(CH3)4+ salt a decrease in the cyclo-N5 stretching vibrations of about 20 cm-1.
MANUFACTURING METHOD OF FLUORINATED HYDROCARBON
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Paragraph 0065, (2018/05/08)
PROBLEM TO BE SOLVED: To provide a method for industrially advantageously manufacturing fluorinated hydrocarbon (3). SOLUTION: There is provided a method for manufacturing fluorinated hydrocarbon represented by the formula (3), including contacting a secondary or tertiary ether compound represented by the formula (1) and acid fluoride represented by the formula (2) in the presence of a silver salt in a hydrocarbon solvent. R1 and R2 are each independently a C1 to 3 alkyl group, R1 and R2 may bind to form a ring structure, R3 is H, a methyl group or an ethyl group, R4 and R5 are each independently a methyl group or an ethyl group. SELECTED DRAWING: None COPYRIGHT: (C)2018,JPOandINPIT
