7647-14-5Relevant articles and documents
Sodium atom Reactions with the Bromochloromethanes: Branching Ratios and Relative Reaction Rates
Jayne, J. T.,Davidovits, P.
, p. 3574 - 3579 (1989)
Branching ratios into bromide and chloride products have been measured for the reaction of atomic sodium with BrCCl3, BrCHCl2 and BrCH2Cl.The bromide to chloride product ratios are 0.55, 1.83, and 4.00, respectively.The experiments were performed in a lin
Facile reactions for the preparation of [(Me3CCH2)2GaNH2]2 and of GaN
Beachley Jr.,Pazik, John C.,Noble, Matthew J.
, p. 2121 - 2123 (1998)
Four reactions of neopentylgallium compounds with ammonia have been investigated. The dihydronaphthalene derivative C10H8[Ga(CH2CMe3)2] 2· 2NaCl has been observed to react with anhydrous ammonia at low temperature (-78 °C) to form (Me3-CCH2)2GaNH2, dihydronaphthalene (C10H10), and NaCl, whereas the related elimination reaction between Ga(CH2-CMe3)3 and NH3 occurred at 140-150 °C. The new compound (Me3CCH2)2GaNH2 was also prepared by reacting Ga(CH2CMe3)2Cl with sodium in liquid ammonia at -70 °C. Bis(neopentyl)gallium amide was fully characterized and exists as a dimer at room temperature in benzene solution. Neopentylgallium(I) [Ga(CH2CMe3)]n has been observed also to react with NH3 at 460-480 °C to form GaN(s), CMe4, and H2.
Hydrogen storage materials: Room-temperature wet-chemistry approach toward mixed-metal borohydrides
Jaro, Tomasz,Orlowski, Piotr A.,Wegner, Wojciech,Fijalkowski, Karol J.,Leszczyski, Piotr J.,Grochala, Wojciech
, p. 1236 - 1239 (2015)
The poor kinetics of hydrogen evolution and the irreversibility of the hydrogen discharge hamper the use of transition metal borohydrides as hydrogen storage materials, and the drawbacks of current synthetic methods obstruct the exploration of these systems. A wet-chemistry approach, which is based on solvent-mediated metathesis reactions of precursors containing bulky organic cations and weakly coordinating anions, leads to mixed-metal borohydrides that contain only a small amount of "dead mass". The applicability of this method is exemplified by Li[Zn2(BH4)5] and M[Zn(BH4)3] salts (M = Na, K), and its extension to other systems is discussed.
Study on the non-isothermal kinetics of decomposition of 4Na 2SO4?2H2O2?NaCl
Hong-Kun,Cao,Dao-Sen,Wen-Lin,Ya-Qong,Qi-Shu
, p. 531 - 536 (2007)
The non-isothermal decomposition kinetics of 4Na2SO 4?2H2O2?NaCl have been investigated by simultaneous TG-DSC in nitrogen atmosphere and in air. The decomposition processes undergo a single step reaction. The multivariate nonlinear regression technique is used to distinguish kinetic model of 4Na2SO 4?2H2O2?NaCl. Results indicate that the reaction type Cn can well describe the decomposition process, the decomposition mechanism is n-dimensional autocatalysis. The kinetic parameters, n, A and E are obtained via multivariate nonlinear regression. The n th-order with autocatalysis model is used to simulate the thermal decomposition of 4Na2SO4?2H2O 2?NaCl under isothermal conditions at various temperatures. The flow rate of gas has little effect on the decomposition of 4Na 2SO4?2H2O2?NaCl.
Flame synthesis of calcium-, strontium-, barium fluoride nanoparticles and sodium chloride
Grass, Robert N.,Stark, Wendelin J.
, p. 1767 - 1769 (2005)
Non-oxidic salts such as NaCl, CaF2, SrF2 and BaF2 were synthesised using a flame spray method; optional doping of such fluorides with rare earth elements suggests possible applications in optics. The Royal Society of Chemistry 2005.
Layered double hydroxide and zirconium phosphate as ion exchangers for the removal of 'black crusts' from the surface of ancient monuments
Boccalon,Nocchetti,Pica,Romani,Casciola
, p. 2976 - 2985 (2018)
The chloride form of MgAl layered double hydroxide (hereafter MgAlCl) as an anion exchanger and the semisodic form of α-zirconium phosphate (hereafter ZrPNaH) as a cation exchanger are proposed as new cleaning agents for the removal of gypsum from ancient monuments. The ability of these exchangers to capture the calcium and sulphate ions of the gypsum powder was first investigated separately and then as a coupled system. MgAlCl/gypsum, ZrPNaH/gypsum and MgAlCl/ZrPNaH/gypsum mixtures were characterized by X-ray powder diffraction (XRD), field emission scanning electron microscopy (FE-SEM) and dispersive X-ray spectroscopy (EDX). ZrPNaH in the form of a wet paste exhibited a rapid uptake of calcium from gypsum powder via Na+ and H+/Ca2+ cation exchange. Gypsum powder was also successfully dissolved by a wet paste of MgAlCl by exploiting the Cl-/SO42- anion exchange reaction. However, the dehydration of the paste favoured the reprecipitation of a secondary gypsum that was characterized by lower crystallinity and smaller particle size than the pristine gypsum. The combination of wet MgAlCl and ZrPNaH showed a synergic effect on the dissolution of gypsum and partially prevented the reprecipitation of gypsum in the dry paste. Finally, a preliminary test of the removal of gypsum crust grown on a sandstone sample was performed.
Crystal chemistry of the Na/FeCl2 battery
Adendorff,Thackeray
, p. 2121 - 2123 (1988)
Five stoichiometric phases of the NaCl-FeCl2 system that can be represented by the general formula Na8-2xFexCl8 (x=0,1,2,3,4,) have been identified in high temperature Na/ FeCl2 cells. Their formation
Reactions of Ground-State and Electronically Excited Sodium Atoms with Methyl Bromide and Molecular Chlorine
Weiss, P. S.,Mestdagh, J. M.,Schmidt, H.,Covinsky, M. H.,Lee, Y. T.
, p. 3005 - 3011 (1991)
The reactions of ground- and excited-state Na atoms with methyl bromide (CH3Br) and chlorine (Cl2) have been studied by using the crossed molecular beams method.For both reactions, the cross sections increase with increasing electronic energy.The product
Functionalization of η1,η2-Bridging Cyaphide (C≡P)- Ligands: Trinuclear η1,η1,η2-Bridging Cyaphide and Dinuclear Bridging Isocyaphide (C≡PR) Complexes of Platinum
Konze, Wayde V.,Young Jr., Victor G.,Angelici, Robert J.
, p. 258 - 267 (1999)
The oxidative addition reaction of Pt(PEt3)4 with Cl2C=PN(SiMe3)2 at low temperature (-50 °C) forms the η1-phosphavinyl complex cis-Cl(Et3P)2Pt[C(Cl)=PN(SiMe3)2] (Ia), which isomerizes to the trans-isomer (Ib) upon warming to 0 °C; the structure of Ib was determined by X-ray diffraction studies. Complex Ib reacts with Pt(PEt3)2Cl2 in the presence of 3 equiv of sodium benzophenone to generate the bridging, dinuclear η1,η2-cyaphide complex Cl(Et3P)2-Pt(μ-η1,η 2-C≡P)Pt(PEt3)2 (II) in good yield, providing a much simpler and higher yield preparation of II, which was synthesized and characterized previously by a more circuitous route. Compound II reacts with 0.5 equiv of [Cl2Pt(PEt3)]2 or with 1 equiv of W(CO)5(THF) to generate the trinuclear metal-cyaphide complexes Cl(Et3P)2Pt[μ-η1,η 1,η2-C≡P{Pt(PEt3)-(Cl) 2}]Pt(PEt3)2 (III) and Cl(Et3P)2Pt[μ-η1,η 1,η2-C≡P{W(CO)5}]Pt(PEt 3)2 (IV), respectively, in which the lone pair of electrons on the C≡P phosphorus atom is coordinated to a Pt-(PEt3)(Cl)2 fragment in the former and to a W(CO)5 fragment in the latter; the structure of IV was determined by X-ray diffraction studies. Compound II also reacts with MeI to form the methyl isocyaphide complex (Cl)(Et3P)Pt(μ-C=PMe)Pt(PEt3)2(I) (Vc), in which the cyaphide (C≡P-) ligand is converted to a methyl isocyaphide (C≡PMe) ligand in a semibridging coordination mode. When compound II is reacted with MeOTf, the product is the cationic isocyaphide complex [(Cl)(Et3P)2Pt(μ-η1,η 2-C≡PMe)Pt(PEt3)2](OTf) (Va), which is likely coordinated in an η1,η2-bridging mode. Compound Va reacts with NaI to form Vc, which suggests that Va forms as an intermediate before Vc in the reaction of II with MeI. ? Dedicated to Professor Helmut Werner on the occasion of his 65th birthday.
Catalytic Reduction of Aqueous Chlorate with MoO xImmobilized on Pd/C
Ren, Changxu,Yang, Peng,Gao, Jinyu,Huo, Xiangchen,Min, Xiaopeng,Bi, Eric Y.,Liu, Yiming,Wang, Yin,Zhu, Mengqiang,Liu, Jinyong
, p. 8201 - 8211 (2020)
Chlorate (ClO3-) is an undesirable byproduct in the chlor-alkali process. It is also a heavily used chemical in various industrial and agricultural applications, making it a toxic water pollutant worldwide. Catalytic reduction of ClO3- into Cl- by H2 is of great interest to both emission control and water purification, but platinum group metal catalysts are either sluggish or severely inhibited by halide anions. Here, we report on the facile preparation, robust performance, and mechanistic investigation of a MoOx-Pd/C catalyst for aqueous ClO3- reduction. Under 1 atm H2 and room temperature, the Na2MoO4 precursor is rapidly immobilized from aqueous solution onto Pd/C as a mixture of low-valent Mo oxides. The catalyst enables complete reduction of ClO3- in a wide concentration range (e.g., 1 μM to 1 M) into Cl-. The addition of Mo to Pd/C not only enhances the catalytic activity by >55-fold, but also provides strong resistance to concentrated salts. To probe the reaction mechanisms, we conducted a series of kinetic measurements, microscopic and X-ray spectroscopic characterizations, sorption experiments, tests with other oxyanion substrates, and a comparative study using dissolved Mo species. The catalytic sites are the reduced MoOx species (primarily MoIV), showing selective and proton-assisted reactivity with ClO3-. This work demonstrates a great promise of using relatively abundant metals to expand the functionality of hydrogenation catalysts for environmental and energy applications.
