Reaction of ?-polynitroalkyl derivatives of sulfur and selenium with hydrogen halides and halide ions

1989 ◽  
Vol 38 (9) ◽  
pp. 1939-1944
Author(s):  
V. I. Erashko ◽  
A. T. Baryshnikov ◽  
N. I. Zubanova ◽  
A. A. Tishaninova
Keyword(s):  
Halide Ions ◽  
Hydrogen Halides ◽  
Derivatives Of

ChemInform Abstract: Reaction of α-Polynitroalkyl Derivatives of Sulfur and Selenium with Hydrogen Halides and Halide Ions.

ChemInform ◽  
1990 ◽  
Vol 21 (19) ◽  
Author(s):  
V. I. ERASHKO ◽  
A. T. BARYSHNIKOV ◽  
N. I. ZUBANOVA ◽  
A. A. TISHANINOVA
Keyword(s):  
Halide Ions ◽  
Hydrogen Halides ◽  
Derivatives Of

Chemistry of phosphorus fluorides. Part II. Secondary alkylamino derivatives of phosphoryl fluoride

1967 ◽  
Vol 45 (12) ◽  
pp. 1309-1319 ◽  
Author(s):  
R. G. Cavell
Keyword(s):  
Fluoride Salt ◽  
Equimolar Ratio ◽  
Hydrogen Halides ◽  
Physical Data ◽  
Phosphorus Fluorides ◽  
Derivatives Of

Phosphoryl fluoride reacts with dimethylamine in an equimolar ratio to yield volatile dimethylaminophosphoryldifluoride. The residual solid is a mixture of dimethylammonium hexafluorophosphate and dimethylammonium difluorophosphate salts rather than the simple fluoride salt. Dimethylamine reacts slowly with dimethylaminophosphoryldifluoride to yield bis(dimethylamino)phosphorylfluoride and the same complex fluorophosphate anions in the solid products. Physical data are reported on the alkylamino phosphoryl fluorides. The reaction of the difluorophosphoryl compound with hydrogen halides has been studied.

Free energies and entropies of transfer of hydrogen halides from water to aqueous 2-methoxy ethanol and structuredness of the solvents

1985 ◽  
Vol 63 (4) ◽  
pp. 798-803 ◽  
Author(s):  
Prabir K. Guha ◽  
Kiron K. Kundu
Keyword(s):  
Dielectric Constant ◽  
Mixed Solvents ◽  
Three Dimensional ◽  
Halide Ions ◽  
Aqueous Mixtures ◽  
Free Energies ◽  
Hydrogen Halides ◽  
Emf Measurements ◽  
Composition Profiles ◽  
The Individual

Standard free energies (ΔGt0) and entropies (ΔSt0) of transfer of HBr and HI from water to some aqueous solutions of 2-methoxy ethanol (ME) have been determined from emf measurements of the cells: Pt, H2 (g, 1 atm)/HBr (m), solvent/AgBr–Ag and Pt, H2 (g, 1 atm)/KOH (m1), KI (m2), solvent/AgI–Ag, respectively, at seven equidistant temperatures ranging from 15 to 45 °C. ΔGt0 values of HBr and HI as well as of HCl obtained from literature, and particularly that of the individual ions obtained by tetraphenylarsonium tetraphenylboron (TATB) assumption, suggest that while H+ is increasingly stabilized by cosolvent-induced larger "basicity", halide ions (X−) are increasingly destabilized by cosolvent-induced decreased "acidity" and the dielectric constant of the mixed solvents compared to that of water. Analysis of the variation of the observed TΔSt0(HX) and particularly of ΔY (= TΔSt0(H+) + TΔS0t.ch (X−), with composition, in the light of Kundu etal's semi-quantitative theory reveals that ME induces breakdown of three dimensional (3D) tetrahedral structures of water at water-rich compositions. This is being followed by an ordered region due to possible H-bonded cosolvent–water complexation and then the usual disordered region due to packing imbalance. Comparison of ΔY(HI)–composition profiles for aqueous mixtures of t-butanol (ButOH), ethylene glycol (EG), and 1,2-dimethoxy ethane (DME) also demonstrates that the remarkable enhancement of 3D water structures by the well known structure promoter ButOH gets succintly diminished when cosolvent ButOH is replaced by EG, ME, and DME, as is expected from structural and electronic considerations of the cosolvents.

Perchlorate and difluorophosphate coordination derivatives of manganese carbonyl

1978 ◽  
Vol 31 (2) ◽  
pp. 267 ◽  
Author(s):  
FL Wimmer ◽  
MR Snow
Keyword(s):  
Mass Spectroscopy ◽  
Room Temperature ◽  
Halide Ions ◽  
Substitution Reactions ◽  
Decomposition Products ◽  
Solvent Molecules ◽  
Ion Yields ◽  
Manganese Carbonyl ◽  
Hydrolysis Of ◽  
Derivatives Of

The complexes Mn(CO)5(OClO3) and Mn(CO)3L2(OClO3) (L = PPh3, P(OPh)3; L2 = bpy*) are formed by abstraction reactions with AgClO4 from the corresponding bromo complexes in dichloromethane. The perchlorato complexes have been characterized by i.r. and mass spectroscopy. They undergo facile substitution reactions in which the perchlorato group is replaced by halide ions (X- = Cl, Br, I), phosphines [PR3 (R = Ph, p- tolyl, m-tolyl), dpe, dpm]* or solvent molecules (MeCN, PhCN, MeOH, Me2CO, py*). Reaction with fluoride ion yields Mn(CO)3F3 plus other decomposition products. When Mn(CO)5X and Mn(CO)3L2X (X = Br) are made to react with AgPF6 in dichloromethane, hydrolysis of the PF6- ion occurs to yield the corresponding difluorophosphato complexes (X = PO2F2-), which have been characterized by i.r., 19F N.M.R. and mass spectroscopy. They are reasonably stable at low temperatures, but decompose at room temperature. The difluorophosphato group is more inert than perchlorato with the rate of substitution decreasing in the order CO ≈ PPh3 > bpy > P(OPh)3.

Effects of Hydrogen Halides On Anodic Polarization of Stainless Steel

CORROSION ◽  
1963 ◽  
Vol 19 (5) ◽  
pp. 180t-185t ◽  
Author(s):  
OLEN L. RIGGS
Keyword(s):  
Stainless Steel ◽  
Sulfuric Acid ◽  
Hydrogen Fluoride ◽  
Anodic Polarization ◽  
Potential Range ◽  
Halide Ions ◽  
Effective Protection ◽  
Hydrogen Halides ◽  
High Concentrations ◽  
Protection From Corrosion

Abstract The anodic polarization of stainless steel in 10 moles/liter sulfuric acid with various concentrations of HF, HCl and HBr has been investigated. At sufficiently high concentrations all of these hydrogen halide ions make it more difficult to establish and maintain passivity. They did not change the potential at which passivation was established, but they narrowed the passive potential range by increasing the potential at which breakdown occurred. They all accelerated the decay of passivity when the applied currents were interrupted. Effective protection from corrosion can still be obtained in these systems. In the presence of 1 mole per liter hydrogen fluoride, there was a substantial increase in current to maintain passivity without any corresponding loss of metal.

Reaction of nido-[6,9-C2B8H10]2–with hydrogen halides. General synthesis of 5-substituted derivatives of arachno-6,9-C2B8H14

1985 ◽  
pp. 1365-1366 ◽  
Author(s):  
Bohumil Štibr ◽  
Zbyněk Janoušek ◽  
Jaromir Plešek ◽  
Tomáš Jelinek ◽  
Stanislav Heřmánek
Keyword(s):  
Hydrogen Halides ◽  
Derivatives Of ◽  
General Synthesis
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