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1.
V. V. Sharutin V. S. Senchurin O. K. Sharutina 《Russian Journal of Inorganic Chemistry》2012,57(3):398-401
The complex [(HOCH2)3CNH3] 2 + [HgI4]2? (I) was synthesized by reacting (trioxymethyl)methylammonium iodide with mercury dioide (2: 1 mol/mol) in acetone. X-ray crystallography shows that the complex consists of two types of crystallographically independent [(HOCH2)3CNH3]+ cations and tetrahedral anions [HgI4]2? (IHgI, 106.49(2)°–113.99(4)°; Hg-I, 2.7849(8)-2.8105(8) Å. [(HOCH2)3CNH3]+ cations are linked via hydrogen bonds O…H-N and O-H…N (O…N, 2.84–2.92 Å) to form polymer chains, which are cross-linked with one another via anions (I…H, 2.81, 2.82 Å). 相似文献
2.
A. S. Kubasov E. Yu. Matveev E. S. Turyshev I. N. Polyakova K. Yu. Zhizhin N. T. Kuznetsov 《Doklady Chemistry》2017,477(1):257-260
The interaction of the [B10H10]2– and [B12H12]2– anions with aliphatic and aromatic nitro compounds (RNO2, where R = Et, n-Pr, i-Pr, tert-Bu, Ph) has been studied under irradiation with visible and UV light. It has been shown that, depending on the reaction conditions, both mono- and disubstituted nitro-closo-decaborates can be selectively obtained in yields up to 50%. 相似文献
3.
Ab initio quantum-chemical calculations of the complexes XeF 5 + XF 6 ? (X = P, As, Sb, and Bi) were performed with the use of relativistic pseudopotentials for heavy atoms and full-electron basis sets. The chemical bonds were characterized by the parameters of critical points (electron density, its Laplacian, total electron energy, and its kinetic and potential components). It was demonstrated that the interaction between the XeF 5 + cation and the XF 6 ? anion in XeF 5 + XF 6 ? follows a key-lock scheme involving directed interactions of bridging fluorine atoms Fb → Xe and that the structuring function of the lone electron pair of the Xe atom is to compensate the destabilizing electrostatic interaction between the Xe and X atoms bearing excess positive charges. 相似文献
4.
I. A. Kyuntsel 《Journal of Structural Chemistry》2005,46(5):924-926
The temperature dependence of the 35Cl NQR frequencies and spin-lattice relaxation times has been investigated for a trigonal-bipyramidal vn complex SbCl3·NH2C6H5. Thermally activated motion of chlorine atoms (pseudorotation) was not revealed in the complex, in contrast to the vπ complexes of SbCl3 with related molecular structures. The high potential barrier of pseudorotation in the aniline complex is likely to be due to the unusually high nonequivalence of Sb-Cl chemical bonds. 相似文献
5.
V. V. Sharutin I. V. Egorova N. N. Klepikov O. K. Sharutina 《Russian Journal of Inorganic Chemistry》2010,55(7):1103-1106
The complex [Ph3P] 4 + [Bi4I16]4? · 2 Me2C=O (I) was synthesized by the reaction of triphenyl(propyl)phosphonium iodide with bismuth iodide in acetone. The crystal structure of complex I was determined by X-ray crystallography. It contains, in addition to solvent molecules, two types of crystallographically independent tetrahedral tetraphenyl(propyl)phosphonium cations and tetranuclear anions [Bi4I16]4? in a chair conformation with the bismuth atoms being in an octahedral coordination. The Bi-I distances in the anion vary within 2.8768(4)–3.2524(4) Å. 相似文献
6.
7.
A. I. Gubanov A. M. Danilenko A. I. Smolentsev N. V. Kuratieva A. B. Venediktov S. V. Korenev 《Journal of Structural Chemistry》2016,57(8):1606-1612
Double complex salts (DCS) α-[Pd(NH3)4][IrF6]·H2O (P21/m, a = 6.3181(3) Å, b = 10.8718(5) Å, с = 7.4526(4) Å, β = 103.568(2)°), β-[Pd(NH3)4][IrF6]·H2O (P21/с, a = 8.5773(3) Å, b = 10.8791(4) Å, с = = 12.6741(3) Å, β = 122.497(2)°), [Pd(NH3)4]3[IrF6]2Cl2·H2O (P-1, a = 7.6080(2) Å, b = 7.6274(2) Å, с = 11.8070(3) Å, β = 122.497(2)°), and [Pd(NH3)4]2[IrF6]NO3 (Fm-3m, a = 11.21210(10) Å) have been synthesized and structurally characterized for the first time. The existence of polymorphs for the DCS has been revealed. The influence of the chemical composition of the initial reagents on the reaction course and, respectively, the products, has been demonstrated. A hypothesis on the influence of the second coordination sphere on the formation of one or the other polymorph of the DCS has been suggested. It has been shown that the series α-[Pd(NH3)4][МF6]·H2O (M = Pt, Pd) exhibits isostructurality. 相似文献
8.
E. E. Karslyan D. S. Perekalin P. V. Petrovskii A. O. Borisova A. R. Kudinov 《Russian Chemical Bulletin》2009,58(3):585-588
The cation [CpRu(η6-C10H8)]+ was shown to exchange naphthalene for other arenes under visible-light irradiation to form the complexes [CpRu (η6-arene)]+ (arene = C6H6, 1,4-C6H4Me2, 1,3,5-C6H3Me3, or 1,2,4,5-C 6H2Me4) in 70–95% yields. The reaction rate of exchange decreases in the series arene = 1,4-C6H4Me2 > C6H6 > 1,3,5-C6H3Me3 > 1,2,4,5-C 6H2Me4 >> C6Me6 and increases with the coordinating ability of the solvent in the order CH2Cl2 < THF—CH2Cl2 mixture (1: 1) < acetone. 相似文献
9.
Makoto Takezaki Hiroyuki Aoki Michiko Kodama Toshihiro Tominaga 《Journal of Thermal Analysis and Calorimetry》2010,101(3):1149-1153
The solubility of hexadecyltrimethylammonium tetrachloroaurate (CTA·AuCl4) in water was measured at different temperatures of 288.2, 293.2, 298.2, 303.2, and 308.2 K. The enthalpy change associated
with the formation of the CTA·AuCl4 precipitate was estimated on the basis of the van’t Hoff equation and was found to be −42.5 ± 2.8 kJ mol−1 at 298.2 K. The calorimetric enthalpy change for the CTA·AuCl4 precipitate formation was directly determined by isothermal titration calorimetry performed at 298.2 K and was found to agree
well with that estimated from the van’t Hoff equation. 相似文献
10.
S. Menecier S. Valette P. Denoirjean P. Lefort 《Journal of Thermal Analysis and Calorimetry》2012,107(2):607-616
In this article, corrosion of Invar® in a static carbon dioxide atmosphere \( 2\times 1 0^{4} \le P_{{{\text{CO}}_{ 2} }} \le 10^{5} \,{\text{Pa}} \) has been studied between 1163 and 1263 K. At the beginning, after a short initial deceleration for weight gains Δm/S <0.5 mg cm?2, oxidation kinetics were linear up to weight gains of about 4.0 mg cm?2, and only wüstite Fe1?x O was formed with a constant rate r (mg cm?2 s?1) \( r = \frac{{{\text{d}}\left( {\frac{\Updelta m}{S}} \right)}}{{{\text{d}}t}} = 0.41 \times P_{{{\text{CO}}_{ 2} }} \exp \left( {\frac{ - 198000}{RT}} \right) \) where R is the gas constant and t the time (s). Reaction mechanism is similar to that of the pure iron in analogous conditions, with the same rate limiting step i.e. external reaction of CO2 with wüstite and outward diffusion of ions Fe2+ (not limiting). For weight gains Δm/S higher than 4 mg cm?2, the limiting step changes, with an increase of the reaction rate and an internal oxidation. The origin of this mechanism change lies in the microcracks appearing in the oxide during its growth. Then, wüstite is no longer bound to the substrate; outward diffusion of ions Fe2+ stops and a topotactic transformation converts wüstite into magnetite. 相似文献
11.
F. Bousmina L. Zayani D. Ben Hassen-Chehimi N. Kbir-Ariguib M. Trabelsi-Ayedi 《Monatshefte für Chemie / Chemical Monthly》2003,134(5):763-768
Summary. The diagram of the ternary system Mg2+/Cl−, SO4
2−–H2O was established at 15°C by means of analytical and conductimetric measurements. Three compounds were found in this diagram,
which are MgSO4·6H2O, MgSO4·7H2O, and MgCl2·6H2O. The solubility field of MgSO4·7H2O is important whereas those of MgSO4·6H2O and MgCl2·6H2O are small. The compositions (mass-%) of the two invariant points determined by the two methods are: MgSO4:MgCl2=2.73:33.80 and MgSO4: MgCl2=3.38:28.91. Both the measured and the calculated isotherm at 15°C have been used for modelling of the diagram Mg2+/Cl−, SO4
2−–H2O between 0 and 35°C. The polythermal invariant point was approximately located between 15 and 10°C.
Corresponding author. E-mail: ariguib@planet.tn
Received October 16, 2002; accepted (revised) December 3, 2002
Published online April 24, 2003
RID="a"
ID="a" Dedicated to Prof. Dr. Heinz Gamsj?ger on the occasion of his 70th birthday 相似文献
12.
B. K. Kasenov Sh. B. Kasenova Zh. I. Sagintaeva A. A. Seisenova M. O. Turtubaeva E. E. Kuanyshbekov K. T. Ermaganbetov 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2016,90(4):739-743
Temperature dependences of the heat capacity of new zincate-manganites of LaM2IIZnMnO6 (MII = Mg, Ca, Sr, Ba) composition are studied via experimental calorimetry in the interval of 298.15–673 K. It is found that all compounds have λ-shape effects on the curve of dependence Cp° ~ ?(T) with respect to phase transitions of the second kind. Equations for the temperature dependence of the heat capacity are derived with allowance for phase transition temperatures, and thermodynamic functions H°(T) ? H°(298.15), S°(T) and Φxx(T) are calculated on the basis of experimental data on Cp°(T) and the calculated S°(298.15) value. 相似文献
13.
Yu. V. Rakitin V. T. Kalinnikov S. G. Khodasevich V. M. Novotortsev 《Russian Journal of Coordination Chemistry》2007,33(12):891-895
The electronic structures of the complex ions [CuCl4]2? and [CuCl5]3? were analyzed in terms of the extended angular overlap model (AOM) with consideration to sd and pd mixing. The total antibonding orbital energies of these ions show no anomalies in the transition from a tetrahedron to a planar square [CuCl4]2? and from a trigonal bipyramid to a tetragonal pyramid [CuCl5]3?. Presumably, the existence of numerous intermediate forms of these complexes is mainly due to the packing effects rather than the electronic factors. 相似文献
14.
E. E. Karslyan D. S. Perekalin P. V. Petrovskii K. A. Lyssenko A. R. Kudinov 《Russian Chemical Bulletin》2008,57(10):2201-2203
Naphthalene in the [CpRu(6−C10H8)]+ complex (1) is substituted for other arenes under reflux in 1,2-dichloroethane to form the [CpRu(6-arene)]+ cations (arene = C6H6, 1,2-C6H4Me2, 1,2,4,5-C6H2Me4, or C6Me6) in 70–80% yields. The reaction is accelerated in the presence of a catalytic amount of acetonitrile. The structure of [1]PF6 was established by X-ray diffraction. 相似文献
15.
P. Storoniak M. Kabir J. Błażejowski 《Journal of Thermal Analysis and Calorimetry》2008,93(3):727-732
The enthalpies of formation of PbCl4, PbCl5− and PbCl62−, originating from quantum mechanics, have enabled the thermodynamic behaviour of these ions with respect to Cl-detachment
to be assessed. The stability of salts containing PbCl5− and PbCl62− as a function of the dimensions of these anions and complementary cations was studied using an approach combining the Kapustinskii-Yatsimirskii
equation with basic thermochemical relationships.
It was found that hexachloroplumbates of monovalent metal cations will not dissociate into metal chlorides and PbCl4, provided the complementary cations are suitably large in size. Hexachloroplumbates of divalent metal cations have not yet
been synthesised since no known metal cations attain the requisite large size. Such salts will not dissociate if the divalent
metal cations are able to complex suitably large electron-donating ligands. The pentachloroplumbates of both monovalent and
divalent metal cations are unstable, since no known metal cations have appropriately large ionic radii. The approach adopted
appears to be useful for the examination of the thermal behaviour, stability and reactivity of chloroplumbates. 相似文献
16.
E. Yu. Matveev S. S. Akimov A. S. Kubasov A. I. Nichugovskii A. S. Nartov V. M. Retivov K. Yu. Zhizhin N. T. Kuznetsov 《Russian Journal of Inorganic Chemistry》2017,62(6):808-813
The reactions of 1,4-dioxane-substituted closo-decaborate anion ([B10H9O2C4H8]–) with metal acetylenides, diethyl malonate, ethyl acetoacetate, triethyl orthoformate, acetylacetone, and malonodinitrile were studied. The reactions were shown to be accompanied with substituent ring opening and attachment of the corresponding pendant functional group. The obtained compounds were characterized by various physicochemical methods (IR and polynuclear NMR spectroscopy, ESI mass spectrometry). 相似文献
17.
A. V. Churakov E. A. Legurova A. A. Dutov P. V. Prikhodchenko T. A. Tripol’skaya 《Russian Journal of Inorganic Chemistry》2008,53(8):1187-1192
Peroxide derivatives of heteropoly compounds with Keggin anions [PW12O40]3? and [SiW12O40]4? are isolated in an individual state from concentrated hydrogen peroxide solutions and characterized by physicochemical methods. The structure of Ba2[SiW12O40] · 4H2O2 · 11H2O (I) is solved by X-ray crystallography. Crystals of compound I (H30Ba2O59Si1W12, FW = 3483.21) are monoclinic, space group C2/c, a = 24.981(2) Å, b = 12.2103(11) Å, c = 18.7142(17) Å, β = 122.620(2)o, V = 4808.0(8) Å3, Z = 4. The structure contains Keggin anions [SiW12O40]4?; all hydrogen peroxide molecules are coordinated to Ba2+ cations. 相似文献
18.
Zongxiao Li Chunlan Yuan 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2011,85(8):1332-1335
With the help of the kinetic parameters (the rate constant (k
in
k
p) and the apparent activation energy (E
in
E
p) of the oscillatory induction period and oscillation period) of the oscillating reaction using thirteen amino acids, leucine
(Leu), threonine (Thr), arginine (Arg), lysine (Lys), histidine (His), alanine (Ala), glutamine (Glu), glycine (Gly), methionine
(Met), cystine (Cys), tryptophan (Trp), serine (Ser) and tyrosine (Tyr), as organic substrates in amino acid-BrO3−-Mn2+-H2SO4-acetone system, then based on the Oregonator model and the thermodynamics theory on irreversible process, the thermodynamic
function (ΔH
in, ΔG
in, ΔS
in and ΔH
p, ΔG
p, ΔS
p) of these oscillating system are studied. The results indicate the entropy ΔS of these oscillating reaction are negative, thereby it is proved that the oscillating reaction is a noequilibrium system
with dissipation structure in agreement with the character of the oscillating reaction from disorder to order in irreversible
thermodynamics. These are satisfactorily to explain the experimental phenomena. 相似文献
19.
M. S. Tarasenko A. Yu. Ledneva N. V. Kurat’eva D. Yu. Naumov Sung-Jin Kim V. E. Fedorov N. G. Naumov 《Russian Journal of Coordination Chemistry》2007,33(12):876-885
The reactions of SnMe3Cl with salts of the cluster anionic complexes [Re6Q8(CN)6]4? (Q = S, Se) gave novel complexes [{(SnMe3)2(OH)}2{SnMe3}2{Re6S8(CN)6}] (I), (Me4N)2[{SnMe3(H2O)}2{Re6Se8(CN)6}] (II), [{(SnMe2)4(μ3-O)}2{Re6Se8(CN)6}] (III), and [(SnMe2)4(μ3-O)2(μ2-OH)2(H2O)2][{SnMe3 2{Re6Se8(CN)6}] (IV). The structures of I–IV were determined by X-ray diffraction. Compounds I, IV have the chain structures with the CN-SnMe3-NC bridges between the cluster anions [Re6Q8(CN)6]4?. Compound II contains isolated fragments {SnMe3(H2O)}2{Re6Se8(CN)6}2?. In the polymer framework of compound III, the cluster anionic complexes [Re6Se8(CN)6]4? are bound by the complex cations [(SnMe2)4(μ3-O)2]4+ formed due to the hydrolysis of the initial (SnMe3)Cl. 相似文献
20.
Evidence for the existence of primitive life forms such as lichens and fungi can be based upon the formation of oxalates.
These oxalates form as a film like deposit on rocks and other host matrices. The anhydrous oxalate mineral moolooite CuC2O4 as the natural copper(II) oxalate mineral is a classic example. Another example of a natural oxalate is the mineral wheatleyite
Na2Cu2+(C2O4)2·2H2O.
High resolution thermogravimetry coupled to evolved gas mass spectrometry shows decomposition of wheatleyite at 255°C. Two
higher temperature mass losses are observed at 324 and 349°C. Higher temperature mass losses are observed at 819, 833 and
857°C. These mass losses as confirmed by mass spectrometry are attributed to the decomposition of tennerite CuO. In comparison
the thermal decomposition of moolooite takes place at 260°C. Evolved gas mass spectrometry for moolooite shows the gas lost
at this temperature is carbon dioxide. No water evolution was observed, thus indicating the moolooite is the anhydrous copper(II)
oxalate as compared to the synthetic compound which is the dihydrate. 相似文献