| | 1 | Author
| Joachim Fuchs, Hernan Guevara | Requires 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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| default:Reihe_B/35/ZNB-1980-35b-1344.pdf | | | | Identifier
| ZNB-1980-35b-1344 | | | | Volume
| 35 | |
| 3 | Author
| J. Fritze, W. Preetz | Requires 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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| default:Reihe_B/42/ZNB-1987-42b-0293.pdf | | | | Identifier
| ZNB-1987-42b-0293 | | | | Volume
| 42 | |
| 4 | Author
| Walter Abriel, Hartmut Ehrhardt | Requires 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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| default:Reihe_B/43/ZNB-1988-43b-0557.pdf | | | | Identifier
| ZNB-1988-43b-0557 | | | | Volume
| 43 | |
| 5 | Author
| M. Maeda, T. Ito, M. Hori, G. Johansson | Requires 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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| default:Reihe_A/51/ZNA-1996-51a-0063.pdf | | | | Identifier
| ZNA-1996-51a-0063 | | | | Volume
| 51 | |
| 6 | Author
| Christovam Mendonça, SaidR. Rabbani | Requires 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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| default:Reihe_A/51/ZNA-1996-51a-0716.pdf | | | | Identifier
| ZNA-1996-51a-0716 | | | | Volume
| 51 | |
| 7 | Author
| MichaelJ. Castiglione, MauroC C Ribeiro, Mark Wilson, PaulA. Madden | Requires cookie* | | | Title
| | | | | 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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| default:Reihe_A/54/ZNA-1999-54a-0605.pdf | | | | Identifier
| ZNA-1999-54a-0605 | | | | Volume
| 54 | |
| 8 | Author
| | 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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| default:Reihe_B/30/ZNB-1975-30b-0914.pdf | | | | Identifier
| ZNB-1975-30b-0914 | | | | Volume
| 30 | |
| 10 | Author
| Heinrich Homborg, Wilhelm Preetz, Günes Barka, Gernot Schätzel | Requires 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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| default:Reihe_B/35/ZNB-1980-35b-0554.pdf | | | | Identifier
| ZNB-1980-35b-0554 | | | | Volume
| 35 | |
| 11 | Author
| G. C. Papavassiliou, D. Layek | Requires 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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| default:Reihe_B/35/ZNB-1980-35b-0676.pdf | | | | Identifier
| ZNB-1980-35b-0676 | | | | Volume
| 35 | |
| 13 | Author
| Ralf Steudel, Torsten Sandow, Jürgen Steidel | Requires 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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| default:Reihe_B/40/ZNB-1985-40b-0594.pdf | | | | Identifier
| ZNB-1985-40b-0594 | | | | Volume
| 40 | |
| 14 | Author
| Ralf Steudel, Detlef Jensen, Bettina Plinke | Requires 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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| default:Reihe_B/42/ZNB-1987-42b-0163.pdf | | | | Identifier
| ZNB-1987-42b-0163 | | | | Volume
| 42 | |
| 15 | Author
| W. Preetz, C. Sartori | Requires 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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| default:Reihe_B/43/ZNB-1988-43b-0094.pdf | | | | Identifier
| ZNB-1988-43b-0094 | | | | Volume
| 43 | |
| 17 | Author
| Rolf Minkwitz, Andreas Liedtke | Requires 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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| default:Reihe_B/43/ZNB-1988-43b-1263.pdf | | | | Identifier
| ZNB-1988-43b-1263 | | | | Volume
| 43 | |
| 18 | Author
| W. Preetz, A. Heinrich, J. Thesing | Requires 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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| default:Reihe_B/43/ZNB-1988-43b-1319.pdf | | | | Identifier
| ZNB-1988-43b-1319 | | | | Volume
| 43 | |
| 19 | Author
| A. Heinrich, W. Preetz | Requires 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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| default:Reihe_B/43/ZNB-1988-43b-1327.pdf | | | | Identifier
| ZNB-1988-43b-1327 | | | | Volume
| 43 | |
|
