55172-29-7Relevant articles and documents
Reactions of trans- and cis-Dichlorobis(benzonitrile)platinum(II) with Acetylacetonate and Benzoylacetonate Carbanions. Formation of N-Acetyl β-Ketoamine Complexes by the Acetyl Group Migration
Uchiyama, Toshihiko,Takagi, Kazuhiko,Matsumoto, Keiji,Ooi, Shun'ichiro,Nakamura, Yukio,Kawaguchi, Shinichi
, p. 1077 - 1084 (1981)
trans-Dichlorobis(benzonitrile)platinum(II) reacted with twice the molar amount of thallium(I) acetylacetonate and benzoylacetonate in dichloromethane at room temperature to afford mainly N-acetyl β-ketoamine chelates, (1a and 3a).This N,O-chelate structure of 1a was determined by X-ray analysis.Reactions of cis- gave C-acetyl and C-benzoyl β-ketoamine chelates, , together with other minor products.Formation of these β-ketoamine chelates is explained by the nucleophilic reactions of the β-diketonate carbanions at the coordinated cyanide carbon atom, followed by migration of the acetyl group or the methine proton of the nucleophiles onto the imino nitrogen atom formed during these reactions.In the presence of free β-diketones, migration of the acyl group was generally suppressed; this led to high yields of C-acyl complexes especially in reactions of cis-.In each case, the reaction proceeded with retention of the geometrical configuration around the central metal atom.The structures of other products, including a compound obtained by acid hydrolysis of 1a, were explored and discussed, based on IR and 1H NMR data.
A study of the mechanochemical synthesis of TlCl nanoparticles by the method of dilution with the final product
Urakaev,Shevchenko
, p. 157 - 163 (2006)
The kinetics of the solid-state mechanochemical synthesis of the nanosized product (TlCl) in the reaction 2NaCl + Tl2SO4 + zNa 2SO4 = (z + 1)Na2SO4 + 2TlCl was studied experimentlaly. The method used was based on the dilution of the initial mixture of powdered reagents (2NaCl + Tl2SO4) with another exchange reaction product (Na2SO4) at the optimum theoretically estimated z value, z = z= 11.25. Several special features of the development of this reaction were established. The parameters of the kinetic curve obtained for the mechanochemical synthesis of the desired product were compared with those of the kinetic curve determined theoretically for the model reaction KBr + TlCl + zKCl = (z + 1)KCl + TlBr with z = z 1 * = 13.5. This allowed us to experimentally estimate the mass transfer coefficient in a mechanochemical reactor by mobile milling bodies. This estimate was obtained for the first time. The dynamics of changes in the size of desired product nanoparticles depending on the time of mechanochemical activation in an AGO-2 ball planetary mill was studied. Pleiades Publishing, Inc., 2006.
Raman spectroscopy study of products of reactions of zirconium and hafnium tetrachlorides with indium and thallium monochlorides
Salyulev,Vovkotrub
, (2013)
Reactions of ZrCl4 and HfCl4 with InCl and TlCl accompanied by formation of several solid complex compounds were studied by the Raman spectroscopy method.
Cobalt half-sandwich, sandwich, and mixed sandwich complexes with soft tripodal ligands
Dodds, Christopher A.,Lehmann, Mario-Alexander,Ojo, Jonathan F.,Reglinski, John,Spicer, Mark D.
, p. 4927 - 4934 (2004)
Reaction of sodium hydrotris(methimazolyl)borate (NaTmMe) with cobalt halides leads to the formation of paramagnetic pseudotetrahedral [Co(TmMe)X] (X = CI, Br, I), of which the bromide has been crystallographically characterized. Mas
New organobimetallic compounds containing catecholate and o-semiquinolate ligands
Piskunov, Alexandr V.,Lado, Arina V.,Ilyakina, Ekaterina V.,Fukin, Georgii K.,Baranov, Evgenii V.,Cherkasov, Vladimir K.,Abakumov, Gleb A.
, p. 128 - 134 (2008)
New organobimetallic compounds CatSn[CpM(CO)n]2 (2-4) were obtained by the insertion of CatSn(II) (1) into the metal-metal bond of [CpM(CO)n]2 (Cat - 3,6-di-tert-butylcatecholate dianion; M = Fe (2), n = 2; M =
Singh, N. B.,Singh, N.,Tiwari, B. N.,Ojha, P. N.
, (1983)
Pitzer Model Parameters for Sparingly Soluble Salts from Solubility Measurements: Thallium(I) Chloride in Aqueous Solutions of Ammonium Chloride, Rubidium Chloride and Caesium Chloride at 298.15 K
Khoo, Kean H.,Fernando, K. Rodney,Lim, Lee-Hoon
, p. 1895 - 1898 (1994)
Measurements are reported of the solubility of thallium(I) chloride in aqueous solutions of ammonium chloride, rubidium chloride and caesium chloride at 298.15 K at concentrations of added salt up to 4.0 mol kg-1.Pitzer model parameters for TlCl β(0) and β(1), were evaluated assuming CΦ = 0.These parameters can account satisfactorily for the ionic interactions between Tl(+) and Cl(-) without the need to assume ion association explicitly, thus simplifying the interpretation of the experimental data.Although the parameter α = 2, which is customarily used for a broad class of electrolytes, is found to be satisfactory for TlCl, larger values of α generally gave better fits to the experimental data.Mixture parameters, θ and ψ, relevant to the various mixed electrolytes are also reported.
MIXED-LIGAND PALLADIUM(II) COMPLEXES CONTAINING O,O prime -CHELATED beta -DIKETONATE AND eta 3-CARBON-BONDED ETHYL 3-OXOBUTANOATE ANIONS. PREPARATION AND REACTIONS WITH SOME LEWIS BASES.
Yamada,Baba,Nakamura,Kawaguchi
, p. 1393 - 1400 (1983)
Novel palladium(II) complexes in which anions of a beta -diketone and ethyl 3-oxobutanoate coordinate to the central metal atom by the O,O prime -chelation and the eta **3 carbon bonding, respectively, were prepared by the reactions of a dinuclear complex with thallium(I) beta -diketonates in benzene or acetone at room temperature. Reactions with Lewis bases such as triphenylphosphine, diethylamine, propylamine, and benzylamine were investigated. In almost all reactions, only the eta **3-carbon-bonded ester ligand was converted into a terminal-carbon-bonded one. The bonding modes for the ligands were determined by means of IR and **1H and **1**3C NMR spectroscopy.
Hydrothermal oxidation - Reduction methods for the preparation of pure and single crystalline alunites: Synthesis and characterization of a new series of vanadium jarosites
Grohol, Daniel,Nocera, Daniel G.
, p. 2640 - 2646 (2002)
Three new redox-based, hydrothermal, synthetic methods have been developed for the preparation of a new series of jarosites, AV3(OH)6(SO4)2 (A = Na+, K+, Rb+, TI+, and NH4+), in high purity and in single crystalline form. The V3+ jarosites have been characterized by single-crystal X-ray and elemental analysis, and by infrared and electronic absorption spectroscopy. The synthetic methods employed here represent a new approach for the preparation of the jarosite class of compounds, which for the past several decades, have been notoriously difficult to prepare in pure form. To demonstrate the impact of our new synthetic techniques on the magnetic properties of jarosites, the V3+ jarosites were also prepared according to the nonredox techniques used over the past 30 years. A comparative study of these samples and those prepared by our new synthetic methods reveals widely divergent magnetic properties, thus pointing to the importance of the new redox synthetic methods to future magnetism studies of jarosite compounds.
Synthesis and dehydrative condensation of square-planar mono- and dinuclear hydroxopalladium complexes with the hydrotris(3,5-diisopropylpyrazolyl)borato ligand (Tp(iPr)2), Tp(iPr)2(Py)Pd-OH, and (μ-OH)2{PdTp(iPr)2(H2O)}2
Akita, Munetaka,Miyaji, Taichi,Muroga, Nobuyuki,Mock-Knoblauch, Cordula,Adam, Waldemar,Hikichi, Shiro,Moro-oka, Yoshihiko
, p. 2096 - 2102 (2000)
Mono- and dinuclear hydroxopalladium complexes (k2-Tp(iPr2,X))(py)Pd-OH (1; X= H,Br) and (μ-OH)2{Pd(κ2-Tp(iPr2))(H2O)}2 (2) are prepared by base hydrolysis of the corresponding chloride complexes (κ2-Tp(iPr2,X))(py)Pd-Cl (3) and (μ-Cl)2{Pd(κ3-Tp(iPr2))}2 (4), respectively. Functionalization of the OH part in 1 is effected via dehydrative condensation with protic substrates (H-A) to give a series of substituted products, (κ2-Tp(iPr))(py)Pd-A (5), and treatment of the dinuclear complex 2 with excess acetic acid affords the mononuclear diacetato complex 6, (κ2-Tp(iPr2)-H)Pd(OAc)2(HOAc). Complexes 1-4 and 6 have been characterized crystallographically, and it is revealed that complexes 2 and 6 involve cyclic hydrogen-bonding interaction among the nitrogen atom of the pendent noncoordinated pyrazolyl group, the hydrogen atom in the protic part of the ligand (OH, AcOH), and, in the case of 2, an external water molecule.
Activation Parameters of Bromoacetate-Thiosulfate Reaction in Ethylene Glycol-Water Mixtures
Biswas, Prasanta Kumar,Maula, Anwarul,Das, Mihir Nath
, p. 2615 - 2618 (1987)
The activation parameters for the reaction between bromoacetate (R) and S2O32- ions in water and aqueous mixtures of ethylene glycol (5-50percent) by weight) have been evaluated from the rate constants corresponding to zero ionic strength, at 1
Polysulfonylamines. CLXIV. Crystal structures of metal Di(methanesulfonyl)amides. 13. Dithallium tris(dimesylamido-N)argentate: A two-dimensional coordination polymer
Latorre, Violeta,Jones, Peter G.,Moers, Oliver,Blaschette, Armand
, p. 1515 - 1521 (2003)
The complex salt Tl2[Ag{N(SO2Me)2} 3] (monoclinic, space group P21/n, Z′ = 1) was obtained by serendipity. Its layer structure displays two unprecedented characteristics, viz. one (MeSO2)2N- ion that strongly deviates from the C2-symmetric standard conformation of this species and approximates to mirror symmetry, and a tris(dimesylamido)argentate anion featuring a trigonal-planar AgN3 core with Ag-N bond lengths of 225.6(6), 226.0(6), 236.3(6)pm and N-Ag-N angles in accordance with VSEPR concepts [149.8(2) vs. 102.8(2) and 107.3(2)°]. The independent thallium ions are coordinated by the complex anions to form monolayer substructures, in which Tl(1) attains an O6 and Tl(2) an O5 environment; the monolayers are associated into bilayers via one independent set of Tl(2)-O bonds that concomitantly raise the coordination number for Tl(2) to six. Both TlO6 polyhedra may be viewed as extremely distorted octahedra reflecting the stereochemical activity of the 6s lone pair of electrons. The two-dimensional Ag-N/Tl-O bonding system is reinforced by a three-dimensional network of weak C-H...O hydrogen bonds.
Cobalt tris(mercaptoimidazolyl)borate complexes: Synthetic studies and the structure of the first cobaltaboratrane
Mihalcik, David J.,White, Jennifer L.,Tanski, Joseph M.,Zakharov, Lev N.,Yap, Glenn P.A.,Incarvito, Christopher D.,Rheingold, Arnold L.,Rabinovich, Daniel
, p. 1626 - 1634 (2004)
The paramagnetic complexes (TmtBu)CoX (X = Cl, Br, I) have been readily prepared and structurally characterized and provide a convenient entry into cobalt(II) tris(mercaptoimidazolyl)borate chemistry. A number of derivatives, including mononuclear triphenylphosphine adducts [(Tm tBu)Co(PPh3)]X and dinuclear compounds [Co 2(TmtBu)2X]Y, have been prepared in order to ascertain whether cobalt is a reliable surrogate for zinc in biological systems, particularly in sulfur-rich coordination environments. The structure of the first cobaltaboratrane is also reported.
Supersilyltrielanes R*nEHal3-n, (E = Triel, R* = SitBu3): Syntheses, characterization, reactions, structures [1]
Wiberg, Nils,Amelunxen, Kerstin,Blank, Thomas,Lerner, Hans-Wolfram,Polborn, Kurt,N?th, Heinrich,Littger, Ralf,Rackl, Manfred,Schmidt-Amelunxen, Martin,Schwenk-Kircher, Holger,Warchold, Markus
, p. 634 - 651 (2001)
Water- and oxygen-sensitive compounds R*EHal2?D, R*EHal2 and R*2EHal (R* = SitBu3; E = B, Al, Ga, In, Tl; Hal = F, Cl, Br, I; D = OR2, NR3) have been synthesized by reaction of EHal3 with NaR* in the absence or presence of donors as well as by substitution of D, Hal or R* by other substituents, or by reaction of R*2E-ER*2 (E = Al, In) with I2, H2, AgF2 or HBr. Thermal decomposition of the compounds in solution or in the gas phase leads to elimination of D from R*EHal2?D, or of R*Hal from R*EHal2 and R*2EHal, respectively. The dihalides R*EHal2 act as Lewis acids with respect to donors OR2 or NR3 (formation of adducts R*EHal2?D), the monohalides R*2EHal as Lewis bases with respect to acceptors EHal3 (formation of R*2E+ EHal4-). Dehalogenations of R*2EHal and R*EHal2 with alkali metals or NaR* leads to compounds R*4E2 (E = Al, In, Tl), R*3E2? (E = Al, Ga), R*4E3? (E = Al, Ga), R*4E4 (E = Al, Ga), R*6Ga8, R*8In12, (R*2B-), R*2Al-, R*3Ga2-, R*4Ga3-, R*4Ga42-, R*4Tl3Cl, or R*6Tl6Cl2. The structures of R*BBr2?Py, R* AlBr2?NEtMe2, (R*AlClOBu)2, R*2BF as well as R*2ECl (E = B, Al, Ga, Tl) have been determined by X-ray structure analyses.
Kinetics of Thallium Dissolution in Aqueous Solutions of Hydrochloric Acid
Sarbaeva,Tuleshova, E. Zh.,Zhylysbaeva,Sarbaeva
, (2019)
Abstract: Potentiometry is used to study the kinetics of electrochemical oxidation and reduction of thallium in aqueous solutions of hydrochloric acid. Kinetic parameters are calculated to characterize the mechanism of the electro-oxidation of thallium: c
Investigation of the C-H activation potential of [hydrotris(1H-pyrazolato-κN1)borato(1-)]iridium (IrTpx) fragments featuring aromatic substituents x at the 3-position of the pyrazole rings
Slugovc, Christian,Mereiter, Kurt,Trofimenko, Swiatoslaw,Carmona, Ernesto
, p. 2868 - 2883 (2001)
A series of pyrazole-substituted [hydrotris(1H-pyrazolato-κN1)borato(1-)]iridium complexes of the general composition [Ir(Tpx)(olefin)2] (Tpx = TpPh and TpTh) and their capability to activate C-H bonds is presented. As a test reaction, the double C-H activation of cyclic-ether substrates leading to the corresponding Fischer carbene complexes was chosen. Under the reaction conditions employed, the parent compound [Ir(TpPh)(ethene)2] was not isolable; instead, (OC-6-25)-[Ir(TpPhκCPh,κ3N, N′,N″)(ethyl)(η2-ethene)] (1) was formed diastereoselectively. Upon further heating, 1 could be converted exclusively to (OC-6-24)-[Ir(TpPhκ2CPh,C Ph,κ3N,N′,N″)(η2- ethene)] (2). Complex 1, but not 2, reacted with THF to give (OC-6-35)-[Ir(TpPhκ3N,N′,N″)H (dihydrofuran-2(3H)-ylidene)] (3), a cyclic Fischer carbene formed by double C-H activation of THF. Accordingly, complexes of the general formula [Ir(Tpx)(butadiene)] (see 4-6; butadiene = buta-1,3-diene, 2-methylbuta-1,3-diene (isoprene), 2,3-dimethylbuta-1,3-diene) reacted with THF to yield 3 or the related derivative 9. The reaction rate was strongly dependent on the steric demand of the butadiene ligand and the nature of the substituent at the 3-position of the pyrazole rings.
Thiolato-bridged linear trinuclear platinum complexes [Pt 3(μ-SR)4(dppm)2]2+
Singhal, Anshu,Jain, Vimal K.,Klein, Axel,Niemeyer, Mark,Kaim, Wolfgang
, p. 2134 - 2142 (2004)
Thiolato-bridged tri- and dinuclear platinum complexes of the types [Pt3(μ-SR)4(dppm)2]2+ (1) and [Pt2(μ-ER)2(dppm)2]2+ (2) (E=S or Se; R=alkyl or aryl; dppm=bis(diphenylphosphino)methane) have been prepared using the mononuclear precursors [Pt(ER)2(dppm)]. The complexes have been characterized by NMR (1H, 13C, 31P, 195Pt), FT-IR and FAB mass spectral data. The structure of [Pt 3(μ-SC6H4CH3-4) 4(dppm)2][CF3SO3] 2·6CH2Cl2 (1d), has been established through X-ray crystallography, revealing a zig-zag arrangement of the three coordination spheres around the platinum atoms.
Insertion of allenes into the Pd-C bond of ortho-palladated primary arylamines of biological relevance: Phenethylamine, phentermine, (l)-Phenylalanine methyl ester, and (l)-tryptophan methyl ester. Synthesis of tetrahydro-3-benzazepines and their salts
Garcia-Lopez, Jose-Antonio,Saura-Llamas, Isabel,McGrady, John E.,Bautista, Delia,Vicente, Jose
, p. 8333 - 8347 (2013/02/22)
The previously reported ortho-metalated complexes [Pd(C,N-ArCH 2CRR'NH2-2)(μ-X)]2 derived from phenethylamine (Ar = C6H4, R = R' = H, X = Cl, Br), phentermine (Ar = C6H4, R = R' = Me, X = Cl), (l)-phenylalanine methyl ester (Ar = C6H4, R = H, R' = CO2Me, X = Cl, Br)), and (l)-tryptophan methyl ester (Ar = C 8H5N, R = H, R' = CO2Me, X = Cl) react with various allenes to give (1) the corresponding η3-allyl complexes derived from the insertion of one molecule of the allene into the Pd-C bond, the formation of which has been studied by DFT using a model complex, or (2) Pd(0) and the tetrahydro-3-benzazepinium salts, resulting from the decomposition of the above mentioned η3-allyl complexes, containing an exocyclic double bond, which, subsequently, react with a base to afford the corresponding benzazepines. The regiochemistry of these decomposition reactions has been studied and compared with that described for similar processes involving five-membered palladacycles. The crystal structures of the salts of some benzazepines and one isoquinoline, derived from a five-membered palladacycle, have been determined by X-ray diffraction studies.
