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1Author    Joachim Fuchs, Hernan GuevaraRequires cookie*
 Title    Struktur und Eigenschaften des Kahumhydrogendiarsenit-Hemihydrats, KHAS204 1/2 H20 Structure and Properties of the Potassiumhydrogendiarsenite-hemihydrate, KHAS2O4 -1/2 H2O  
 Abstract    KHAS2O4 • 1/2 H2O crystallizes in the tetragonal space group I 4/m with the lattice constants a = 14,480 A, c = 5,250 A. The anion forms infinite chains, [HAs204]n n_ , in the direction of the c axis. Arsenic is surrounded by three oxygens in trigonal pyramidal co-ordinations. Ultracentrifuge work shows that the solution contains monomeric species, probably [ASO(OH)2]~. Raman spectra gave no evidence for the existence of As-H-bonds either in the solid or in solution. 
  Reference    Z. Naturforsch. 35b, 1344—1348 (1980); eingegangen am 20. Juni 1980 
  Published    1980 
  Keywords    Polyarsenite, Structure, Raman Spectra, Ultracentrifuge 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-1344.pdf 
 Identifier    ZNB-1980-35b-1344 
 Volume    35 
2Author    Hans Zimmer, Madhusudan Jayawant, Adel Amer, BruceS. AultRequires cookie*
 Title    Reactions of Alkylamino-and Dialkylaminotriphenylphosphonium Halides with Halogens and Interhalogen Compounds; Formation of Alkylaminotriphenylphosphonium Polyhalides  
 Abstract    Alkylamino-and cycloalkylaminotriphenylphosphonium halides react with elemental halogens or interhalogen compounds to afford alkylamino-or cycloalkylaminotriphenyl-phosphonium trihalides. The stability of these trihalides depends on the cation as well as the trihalide anion. The assignment of a trihalide structure to these compounds was based on elemental analysis and on IR-and Raman spectroscopic evidence. Most stable are the tribromide and [1X2]° salts. During all reactions involving N-alkylamino-and N-cyclo-alkylaminotriphenylphosphonium halides and elemental halogens an N-halogenation of the cation was not observed. 
  Reference    (Z. Naturforsch. 38b, 103—107 [1983]; received September 20 1982) 
  Published    1983 
  Keywords    Halides, IR Spectra, Raman Spectra 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-0103.pdf 
 Identifier    ZNB-1983-38b-0103 
 Volume    38 
3Author    J. Fritze, W. PreetzRequires cookie*
 Title    c/osö-Halogenohydrohexaborate, III Schwingungsspektren der c/oso-Halogenohydrohexaborate X"B  
 Abstract    ~, n = 1-5; X = Cl, Br, I c/oso-Halogenohydrohexaborate, III Vibrational Spectra of the c/oso-Halogenohydrohexaborates X"B 6 H 6 _" 2_ , n = 1-5; X = Cl, Br, I The IR and Raman spectra of 20 different halogenohydrohexaborates, including pairs of geometric isomers of the series X"B 6 H 6 _ n :_ , X = Cl, Br, I; n = 1—5, have been assigned according to their point groups D 4h , C 4v , C 3v and C 2v determined previously by NMR studies. Due to weak coupling, the vibrations are treated separately to a first approximation in terms of internal B 6 -cage modes on one hand and modes of the substituents against the cage entity on the other hand. Disregarding the splitting by lowered symmetry, depending on the degree of halogenation, all internal modes of the B 6 cluster are observed at nearly unchanged positions in the range of 450—1250 cm -1 . The B 6 —X stretching vibrations, however, exhibit significant shifts to lower energy with increasing mass of substituents. 
  Reference    Z. Naturforsch. 42b, 293—300 (1987); eingegangen am 21. November 1986 
  Published    1987 
  Keywords    Halogenohydrohexaborates, IR Spectra, Raman Spectra 
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 TEI-XML for    default:Reihe_B/42/ZNB-1987-42b-0293.pdf 
 Identifier    ZNB-1987-42b-0293 
 Volume    42 
4Author    Walter Abriel, Hartmut EhrhardtRequires cookie*
 Title    Über hexakoordinierte gemischte Halogeno-Anionen des Te(IV): Kristallographische und Raman-spektroskopische Untersuchungen an Rb 2 TeBr 3 , 5 Cl 2 , 5 On Hexacoordinated Mixed Halogeno Anions of Te(IV): Crystallographic and Raman Spectroscopic Investigation of Rb 2 TeBr 3 5 C1 2 5  
 Abstract    The title compound contains the anions [TeBr 3 Cl 3 ] 2_ and [TeBr 4 Cl 2 ] 2_ in a 1:1 ratio. The corresponding point symmetries, detected by Raman spectroscopic methods, are 3 m and 4/mmm, respectively. The crystal structure analysis exhibits a random distribution of these anions: K 2 PtCl 6 -type, space group Fm3m with a = 10.4602(5) Ä and Z = 4, final R = 0.036 from 178 F n (MoKa). Einführung 
  Reference    Z. Naturforsch. 43b, 557—560 (1988); eingegangen am 7. Januar 1988 
  Published    1988 
  Keywords    Tellurates, Crystal Structure, Raman Spectra 
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 TEI-XML for    default:Reihe_B/43/ZNB-1988-43b-0557.pdf 
 Identifier    ZNB-1988-43b-0557 
 Volume    43 
5Author    M. Maeda, T. Ito, M. Hori, G. JohanssonRequires cookie*
 Title    The Structure of Zinc Chloride Complexes in Aqueous Solution  
 Abstract    The structure of zinc chloride complexes with different ratios of chloride to zinc, formed in concentrated ZnCl 2 aqueous solutions, were determined from large-angle X-ray scattering using concentrations of the chloride complexes estimated by complementary Raman spectroscopic mea-surements. The highest chloro complex, [ZnCl 4 ] 2 ~, is tetrahedral with a Zn-Cl bond length of 2.294(4) Ä. The trichloro complex, [ZnCl 3 ]~, which coordinates one water molecule, is pyramidal with the Cl-Zn-Cl angle 111°. The Zn-Cl and the Zn-H 2 0 bonds are 2.282(4) and 1.9 A, respec-tively. The two lower complexes, [ZnCl 2 ] and [ZnCl] + , cannot be separated by Raman spectra. o The average Zn-Cl distance in these complexes is 2.24 Ä, and the average Zn-H 2 Ö distance is 1.9 A. In [Zn(H 2 0) 6 ] 2+ the Zn-H 2 0 distance is 2.15 Ä. of zinc (II) chloride complexes; structure of hydrated non-complexed zinc (II) ion. 
  Reference    Z. Naturforsch. 51a, 63—70 (1996); received November 7 1995 
  Published    1996 
  Keywords    X-ray diffraction, Raman spectra, IR spectra, structures 
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 TEI-XML for    default:Reihe_A/51/ZNA-1996-51a-0063.pdf 
 Identifier    ZNA-1996-51a-0063 
 Volume    51 
6Author    Christovam Mendonça, SaidR. RabbaniRequires cookie*
 Title    Anharmonic Lattice Vibrations and the Temperature Shift of Raman Spectral Lines  
 Abstract    The temperature dependence of the average lattice mode frequency of a molecule undergoing librational motion in a quasi-harmonic potential has been calculated with the purpose of finding an explicit relationship between the observed shift of Raman spectral lines with temperature and the anharmonic term in the rotational potential. Calculations were carried out both for uncoupled and coupled oscillators. The equations obtained with this model provide good fittings for solid Cl 2 and benzene data. This result can be applied to the analysis of the temperature dependence of NQR frequencies in molecular crystals. 
  Reference    Z. Naturforsch. 51a, 716—720 (1996); received November 20 1995 
  Published    1996 
  Keywords    Vibrational Spectroscopy, Raman Spectra, Anharmonic Vibrations, NQR 
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 TEI-XML for    default:Reihe_A/51/ZNA-1996-51a-0716.pdf 
 Identifier    ZNA-1996-51a-0716 
 Volume    51 
7Author    MichaelJ. Castiglione, MauroC C Ribeiro, Mark Wilson, PaulA. MaddenRequires cookie*
 Abstract    The structures of melts containing cryolite have proved difficult to confirm, despite decades of study, on account of the high temperatures and corrosiveness of these melts. Raman spectroscopy has so far provided the majority of the insight into the aluminium coordination environments, but some of its interpretations are still debated. In this paper we present the results of MD simulations on various NaF-AlF^ liquid mixtures using published potentials developed for the solid state and published Raman spectra. 
  Reference    Z. Naturforsch. 54a, 605—610 (1999); received August 23 1999 
  Published    1999 
  Keywords    Cryolite, Raman Spectra, MD Simulation, Complex Ions 
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 TEI-XML for    default:Reihe_A/54/ZNA-1999-54a-0605.pdf 
 Identifier    ZNA-1999-54a-0605 
 Volume    54 
8Author    Requires cookie*
 Title    Komplexchemie polyfunktioneller Liganden  
 Abstract    , XXXV1 Das Reaktionsverhalten von Co2(CO)8 gegenüber dem tritertiären Phosphin l.l.l-Tris(diphenylphosphinomethyl)äthan Complex Chemistry of Polyfunctional Ligands, X X X V 1 Reaction o f Co2(CO)8 w ith the T ritertiary Phosphine 1,1,1-Tris(diphenylphosphinom ethyl)ethane J o c h e n E l l e r m a n n und J o a c h i m F. S c h i n d l e r Octacarbonyldicobalt reacts with the tritertiary phosphine l,l,l-tris(diphenylphosphino-methyl)ethane (TDPME) to give the ionic complex [Co(CO)2TDPME][Co(CO)4]. Treat­ ment of [Co(CO)2TDPME][Co(CO)4] with Na[B(CeH5)4], HCIO4 and CH3J yields the 
  Reference    (Z. Naturforsch. 30b, 914—919 [1975]; eingegangen am 7. Juli 1975) 
  Published    1975 
  Keywords    Cobaltcarbonyl Derivatives, Tritertiary Phosphine, Raman Spectra, IR Spectra 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0914.pdf 
 Identifier    ZNB-1975-30b-0914 
 Volume    30 
9Author    D. Layek, G. C. PapavassiliouRequires cookie*
 Title    Some New One-dimensional Compounds: Preparation and Optical Properties  
  Reference    (Z. Naturforsch. 35b, 112—113 [1980]; received June 7/October 2 1979) 
  Published    1980 
  Keywords    Raman Spectra, Preparation, Platinum-mixed Valence 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0112_n.pdf 
 Identifier    ZNB-1980-35b-0112_n 
 Volume    35 
10Author    Heinrich Homborg, Wilhelm Preetz, Günes Barka, Gernot SchätzelRequires cookie*
 Title    Darstellung und spektroskopische Charakterisierung von Tetrahalogenooxalato-Osmaten(IY)  
 Abstract    Reaction of [OsXe] 2-(X = CI, Br, I) with oxalic acid in water gives the very stable and deeply coloured new complexes [OsX40x] 2-which can be precipitated as alkali or tetra-alkylammonium salts. The salts with long-chain alkylammonium ions are soluble in all common no polar solvents. The IR and Ra spectra and the depolarization ratios are consistent with the local C2v-symmetry. The coupling between the vibrations of co-ordinated oxalate and with the skeletal [OsX402]-modes is apparently small. The optical spectra have been studied at low temperature (10 K). Analogous to [OsXe] 2-the very intense absorptions in the UV and VIS are assigned to the electric dipole allowed electron transfer from "(jr+cr)tiu, 7rt2U(y7), 7it2u(y8) and (<r-f-7r)tiu" to "dt2g". By the descent in symmetry each of these transitions is further split in three components (Ai, Bi, B2) corresponding to the three different groups of ligands, X2 tr -, X2 C -and ox. The distinction between the X2 tr --*-Os and X2 C --> Os is caused by a static trans-effect and depends on the difference of the optical electronegativities induced by ox. This splitting is not observed for [OsCLiox] 2 -but is about 900 cm-* for [OsBr4ox] 2 -and 1200 cm" 1 for [OsI4ox] 2 -. The well defined bands in the NIR and VIS are assigned to the intraconfigurational d-d-transitions between the spin-orbit components in the octahedral doublegroup Oh* splitted by the lower C2v-symmetry. Some of the zero-phonon transitions within the split of the 3 Tig, Oh-groundstate exhibit extremely high intensities (e~2500 cm 2 /mmol). The assign-ment of these transitions is improved by the electronic Ra spectra. The finestructure of some of the d-d-transitions originates from coupling with Ai vibrational modes especially with Vs(C-O). 
  Reference    Z. Naturforsch. 35b, 554—563 (1980); eingegangen am 10. Dezember 1979 
  Published    1980 
  Keywords    Tetrahalooxalato-osmates(IV) UV-VIS Spectra, IR Spectra, Raman Spectra 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0554.pdf 
 Identifier    ZNB-1980-35b-0554 
 Volume    35 
11Author    G. C. Papavassiliou, D. LayekRequires cookie*
 Title    Electronic and Resonance Raman Spectra of Some New Mixed-Valence Compounds of Pt and Pd with a Metal-Halide Chain  
 Abstract    The electronic and resonance Raman spectra of new mixed-valence compounds of the type M2'[M(L)X3][M(L)X5], where M' = K, NH4, M -Pt or Pd, L = NH3 or pyridine, and X = Cl, Br or I, have been studied. The single-crystal polarized reflectance spectra indicate the one-dimensional semiconductor behaviour. The polarized resonance Raman spectra confirm the —M(II)—X-M(IV)-X linear chain structure, which is in accordance with the X-ray results. The polarization of M-N bands can be explained by the Snyder's theory (1971). 
  Reference    Z. Naturforsch. 35b, 676—679 (1980); received January 14 1980 
  Published    1980 
  Keywords    Electronic Spectra, Raman Spectra, Mixed-Valence, Oriented Molecules 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0676.pdf 
 Identifier    ZNB-1980-35b-0676 
 Volume    35 
12Author    Rolf Minkwitz, Rüdiger NaßRequires cookie*
 Title    Spektroskopische Untersuchungen an Monofluorammoniumsalzen Spectroscopic Studies on Monofluorammonium Salts  
 Abstract    The NMR, IR and Raman spectra of several NHaF+X -salts are reported. The prepara-tion of NH3F+SO3CI-and NH3F+SO3F-is described. 
  Reference    Z. Naturforsch. 37b, 1558—1563 (1982); eingegangen am 21. Juli 1982 
  Published    1982 
  Keywords    NMR Spectra, Raman Spectra, IR Spectra 
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 TEI-XML for    default:Reihe_B/37/ZNB-1982-37b-1558.pdf 
 Identifier    ZNB-1982-37b-1558 
 Volume    37 
13Author    Ralf Steudel, Torsten Sandow, Jürgen SteidelRequires cookie*
 Title    Darstellung und Eigenschaften von cyclo-Nonaschwefeloxid (S 9 0) und von cjc/o-Dekaschwefeloxid (Si 0 O) [1]  
 Abstract    Preparation and Properties of cyc/o-Nonasulfuroxide (S 9 0) and of cyc/o-Decasulfuroxide (S 10 O) [1] The homocyclic oxides S 9 0 (m.p. 33 °C, dec.) and S 10 O (m.p. 51 °C, dec.) have been prepared by oxidation of the corresponding sulfur rings S 9 and S 10 , respectively, by trifluoroperoxy acetic acid (molar ratio 1:2—3) in a carbon disulfide/methylene chloride mixture. According to infrared and Raman spectra, both compounds contain an exocyclic oxygen atom. S 9 0 and S 10 O decompose at 25 °C to give S0 2 and a polysulfuroxide S n O with «>10 but both can be stored at —78 °C without decomposition. The SS bond distances are discussed on the basis of the Raman spectra. In addition, the Raman spectrum of solid S 9 has been recorded for the first time. It shows that S 9 crystallizes as two allotropes (a-and ß-S g) both consisting of cyclic molecules of either Q or C 2 symmetry with bond distances of between 203 and 209 pm. 
  Reference    Z. Naturforsch. 40b, 594—600 (1985); eingegangen am 5. November 1984 
  Published    1985 
  Keywords    Sulfur Rings, Sulfur Oxides, Raman Spectra 
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 TEI-XML for    default:Reihe_B/40/ZNB-1985-40b-0594.pdf 
 Identifier    ZNB-1985-40b-0594 
 Volume    40 
14Author    Ralf Steudel, Detlef Jensen, Bettina PlinkeRequires cookie*
 Title    Low Temperature Raman Spectra of Dichlorosulfane (SC1 2 ), Tetrachlorosulfurane (SC1 4 ), Dichlorodisulfane (S 2 C1 2 ) and Dichlorodiselane (Se 2 Cl 2 ) [1]  
 Abstract    The Raman spectrum of commercial "sulfur dichloride" shows strong lines due to SC1 2 and S 2 C1 2 and weak Cl 2 lines at 25 °C, but strong SC1 2 and SC1 4 signals at —100 °C (the latter are superimposed on the S 2 C1 2 lines). Thus, the intense Raman effect of SC1 4 can be used to detect small amounts of chlorine in SC1 2 . Mixtures of SC1 2 and Cl 2 (1:15) yield the Raman spectrum of SC1 4 at —140 °C, while at 25 °C not trace of this compound can be detected. The spectra of SC1 4 and a-SeCl 4 are quite different, indicating different molecular and/or crystal structures, although EC1 3 + ions (E — S, Se) are present in both cases. While Se 2 Cl 2 dimerizes reversibly below —50 °C, S 2 C1 2 neither dimerizes nor isomerizes on cooling. The S 2 C1 2 dimer is characterized by a Raman line at 215 cm" 1 the intensity of which was used to calculate an enthalpy of dimerization as of -17 kJ/mol. 
  Reference    Z. Naturforsch. 42b, 163—168 (1987); received September 22 1986 
  Published    1987 
  Keywords    Raman Spectra, Sulfur Chlorides, Selenium Chlorides 
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 TEI-XML for    default:Reihe_B/42/ZNB-1987-42b-0163.pdf 
 Identifier    ZNB-1987-42b-0163 
 Volume    42 
15Author    W. Preetz, C. SartoriRequires cookie*
 Title    Darstellung und Schwingungsspektren des 13 C-und 18 0-markierten rrans-Dioxotetracyanoosinats(VI), [0s0 2 (CN) 4 ] 2 ~ Preparation and Vibrational Spectra of 13 C and ls O Labelled mms-Dioxotetracyanoosrnate(VI), [0s0 2 (CN) 4 ] 2  
 Abstract    Through careful acidification of the aqueous solution of [0s0 2 (0H) 4 ] 2 ~ in the presence of CN or 13 CN~ with acetic acid, [0s0 2 (CN) 4 ] 2 " or [OsO : (13 CN) 4 ] 2:: are formed, respectively. The reaction of 0s 18 0 4 and tetrabutylammonium cyanide with glacial acetic acid in anhydrous methanol yields [0s 18 0 2 (CN) 4 ] 2 ~. The shifts of the infrared and Raman bands of the isotopically labelled complexes are in good agreement with Teller-Redlich calculations. The degenerate E modes, expected for tetragonal symmetry, are split by approx. 15 cm ', indicating an orthorhombic distortion of the complex ion in the solid state. Therefore, all the observed IR-and Raman frequencies are assigned according to point group D 2h . For the complex containing an 16 0 = 0s= 18 0 axis, the symmetry is lowered to C 2v , and the rule of mutual exclusion is restricted. This results in a weak absorption in the infrared spectrum of the Raman active symmetric OsO stretching vibration and vice versa a weak band in the Raman spectrum for the antisymmetric infrared active mode. 
  Reference    (Z. Naturforsch. 43b, 94—98 [1988]; eingegangen am 11. September 1987) 
  Published    1988 
  Keywords    /rans-Dioxotetracyanoosmate(VI) Isotopic Labeling, IR Spectra, Raman Spectra 
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 TEI-XML for    default:Reihe_B/43/ZNB-1988-43b-0094.pdf 
 Identifier    ZNB-1988-43b-0094 
 Volume    43 
16Author    Reinhard Strauss, Ralf SteudelRequires cookie*
 Title    Darstellung von Cyclopentadekaschwefel (S 15 ) aus Titanocenpentasulfid und Sulfurylchlorid [1] Synthesis of Cyclopentadecasulfur (S 15 ) from Titanocene Pentasulfide and Sulfuryl Chloride [1]  
 Abstract    Titanocene pentasulfide reacts with sulfuryl chloride under suitable conditions to give a mixture of mainly S 10 , S 15 , and S 2 n which can be separated by repeated crystallization and precipitation. Pure S, 5 is obtained as a lemon-yellow powder at low temperatures which transforms to a sticky mass at 20 °C. Solutions of S 15 in CS 2 are stable at 20 °C for months. Pure S 15 does not decompose at 20 °C within a few hours. Raman spectra of S 15 show stretching vibrations at 409—480 cm" 1 and bending and torsional modes at < 270 cm H . 
  Reference    Z. Naturforsch. 43b, 1151—1155 (1988); eingegangen am 20. Mai 1988 
  Published    1988 
  Keywords    Elemental Sulfur, Raman Spectra, HPLC, Sulfur Rings 
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 TEI-XML for    default:Reihe_B/43/ZNB-1988-43b-1151.pdf 
 Identifier    ZNB-1988-43b-1151 
 Volume    43 
17Author    Rolf Minkwitz, Andreas LiedtkeRequires cookie*
 Title    Darstellung und spektroskopische Charakterisierung von FIuor(trifluormethylsulfenyl)phosphonium-Salzen, CF 3 SPH 2 F + MF 6 -(M = As, Sb) Preparations and Spectroscopic Characterization of Fluoro(trifluoromethylsulfenyl)phosphonium Salts, CF 3 SPH 2 F~MF 6 ~ (M = As, Sb)  
 Abstract    The preparations of the title compounds are reported. The species have been characterized by multinuclear ('H, l3 C, 19 F, 3I P) NMR techniques. Their decomposition, leading mainly to PH 2 F 2 + MF 6 ~, was also studied. The Raman spectrum of CF,SPH 2 F + AsF 6 ~ is presented. 
  Reference    Z. Naturforsch. 43b, 1263—1267 (1988); eingegangen am 1. Juni 1988 
  Published    1988 
  Keywords    Fluoro(trifluoromethylsulfenyl)phosphonium Salts, NMR Spectra, Raman Spectra 
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 TEI-XML for    default:Reihe_B/43/ZNB-1988-43b-1263.pdf 
 Identifier    ZNB-1988-43b-1263 
 Volume    43 
18Author    W. Preetz, A. Heinrich, J. ThesingRequires cookie*
 Title    c/oso-Halogenohydrohexaborate, IV Protonierung, Deuterierung und Schwingungsspektren von c/aso-Hexaboraten c/oso-Halogenohydrohexaborate, IV Protonation, Deuteration and Vibrational Spectra of c/oso-Hexaborates  
 Abstract    The weak Brönsted acids B 6 H 7 ~ and XB^H,", X = Cl, Br, I; pk a : 7-4,75, are formed by protonation of B 6 H h 2 ~ and XB 6 H 5 2 respectively. The deuteration rates, evaluated from inte-grated IR band intensities of the BH and BD stretching vibrations, are linearly dependent on the mole fractions of the protonated species, and decrease with increasing degree of halogenation in the series Cl>Br>I. H atoms trans-positioned to halogens are exchanged 100 times more rapidly than the remaining ones. The activation energy for the H/D exchange amounts to 76 ± 1,5 kJ/mol for B 6 H 7 ". The lower symmetry of the protonated borates is evident from additional IR and Raman bands. They are distinguished from the corresponding Brönsted bases by a high frequency shift of the BH stretching vibrations in the order of 100 cm '. Due to the pH dependent equilib-rium B h H (S 2 ~/B (,H 7 " and different solubilities of the tetrabutylammonium salts, the separation of BF,H 6 2 "/B 12 H| 2 2 " mixtures is achievable. In alkaline solutions the very soluble B ft H 6 2 ~ is present, whereas (TBA) 2 B, : HI : precipitates quantitatively. By subsequent cautious acidification of the supernatant, insoluble (TBA)B 6 H 7 is obtained. 
  Reference    Z. Naturforsch. 43b, 1319—1326 (1988); eingegangen am 16. Juni 1988 
  Published    1988 
  Keywords    Halogenohydrohexaborates, Protonation Deuteration, IR Spectra, Raman Spectra 
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 TEI-XML for    default:Reihe_B/43/ZNB-1988-43b-1319.pdf 
 Identifier    ZNB-1988-43b-1319 
 Volume    43 
19Author    A. Heinrich, W. PreetzRequires cookie*
 Title    Darstellung und Schwingungsspektren von Alkyl-und Rhodanohydrohexaboraten Preparation and Vibrational Spectra of Alkyl and Rhodano Hydrohexaborates  
 Abstract    Treatment of B 6 H 6 2 " with iodoalkanes and (SCN) 2 in organic solvents affords the monosubsti-tuted protonated hexaborates RB 6 H 6 ", R = CH 3 , C 2 H 5 < C 3 H 7 , C 4 H 9 , C 8 H 17 and SCN, respective-ly. The acidity constants of these weak Brönsted acids range for the alkylated species from 8.8 to 9.6, and for R = SCN the pk a value is ~5. From basic solutions the salts Cs 2 RB 6 H 5 can be precipitated, which show band patterns in the IR and Raman spectra typical for monosubstituted hydrohexaborates. The protonated compounds RB 6 H 6 " are distinguished from the corresponding Brönsted bases RB 6 H 5 2 " by a high frequency shift of the BH stretching vibrations in the order of 100 cm" 1 . For Cs 2 (SCN)B 6 H 5 , S coordination of SCN" is supposed because of the high frequency of v CN : 2144 cm" 1 . 
  Reference    Z. Naturforsch. 43b, 1327—1331 (1988); eingegangen am 8. Juli 1988 
  Published    1988 
  Keywords    Alkylhydrohexaborates, Rhodanohydrohexaborate, Protonation, IR Spectra, Raman Spectra 
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 TEI-XML for    default:Reihe_B/43/ZNB-1988-43b-1327.pdf 
 Identifier    ZNB-1988-43b-1327 
 Volume    43 
20Author    Rolf Minkwitz, Volker GerhardRequires cookie*
 Title    Preparation of SH3 +AsF6~ and SCl3 ^SbF6_ [1]  
  Reference    Z. Naturforsch. 44b, 364 (1989); eingegangen am 21. D ezem ber 1988 
  Published    1989 
  Keywords    Preparation, Raman Spectra, N M R Spectra, Sulfonium Salts 
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 TEI-XML for    default:Reihe_B/44/ZNB-1989-44b-0364_n.pdf 
 Identifier    ZNB-1989-44b-0364_n 
 Volume    44