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'IR spectra' in keywords Facet   Publication Year 1980  [X]
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1980[X]
1Author    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 
2Author    Kurt Dehnicke, Rainer LößbergRequires cookie*
 Title    Preparation and IR Spectrum of 0s04 * 2 SbCl5  
 Abstract    Osmiumtetroxide and antimony pentachloride form a donor acceptor complex, 0s04 • 2 SbCls. According to the IR spectrum the complex contains OsOSb bridges. With VCLj, TiCU, M0CI5 and osmiumtetroxide rapid ligand exchange reactions occur, forming VOCI3, TiOCl2 and several oxochlorides of molybdenum and OsCLi, respectively. 
  Reference    Z. Naturforsch. 35b, 1587—1588 (1980); eingegangen am 4. August 1980 
  Published    1980 
  Keywords    Preparation, IR Spectra, Osmiumtetroxide-Antimonypentachloride Donor-Acceptor Complex 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-1587_n.pdf 
 Identifier    ZNB-1980-35b-1587_n 
 Volume    35 
3Author    Emmanuel Chukwuemeka OkaforRequires cookie*
 Title    The Metal Chelates of Heterocyclic /3-Diketones and their Derivatives, Part IV New Mixed Ligand Tetrakis Complexes of Lanthanides Derived from tris-Acetylacetonates and Some 4-Acyl Pyrazolones  
 Abstract    Some new mixed ligand tetrakis chelates derived from tris acetylacetonates of La, Ce, Pr, Nd, and Gd -with other /?-diketones, like l-phenyl-3-methyl-4-benzoyl-pyrazolone-5 and l-phenyl-3-methyl-4-acetyl-pyrazolone-5 have been synthesised. The compounds are characterised by elemental analyses and IR data. The UV spectral properties and the conductance in DMF have also been reported. 
  Reference    Z. Naturforsch. 35b, 715—718 (1980); received January 2 1980 
  Published    1980 
  Keywords    Lanthanon Mixed Ligand Tetrakis Chelates, Synthesis, UV Spectra, IR Spectra 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0715.pdf 
 Identifier    ZNB-1980-35b-0715 
 Volume    35 
4Author    Fritz Preuss, Willi Towae, Joachim WoitschachRequires cookie*
 Title    Darstellung und Reaktionen der Oxovanadin(V)-tricarboxylate Synthesis and Reactions of Oxovanadium(V) Tricarboxylates  
 Abstract    Monomeric oxovanadium(V) tricarboxylates VO(RCOO)3 are prepared by reaction of VOCI3 with an excess of silver carboxylate in CH2CI2 or by depolymerization of (V02RC00)n in carboxylic acid anhydride. Their properties are studied by IR and X H NMR spectroscopy as well as by chemical reactions such as thermolysis, solvolysis, redistribution and complex formation. The structure of 2,2'-dipyridyl and 1,10-phenanthroline complexes [VO(RCOO)3 • B] (B = C10H8N2, C12H8N2) has been found to be octahedral with meridional arrangement of the carboxylate ligands. Syntheses of Na[VO(CH3COO)4] and Ba[V02(CH3C00)3] • 2CH3COOH are described. 
  Reference    Z. Naturforsch. 35b, 817—823 (1980); eingegangen am 8. Oktober 1979/14. Januar 1980 
  Published    1980 
  Keywords    Oxovanadium(V) Tricarboxylates, Preparation, Reaction, iH NMR Spectra, IR Spectra 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0817.pdf 
 Identifier    ZNB-1980-35b-0817 
 Volume    35 
5Author    Kurt Dehnicke, Josef Schmitte, Dieter FenskeRequires cookie*
 Title    Tetrazido-Nitrido-Molybdat(VI); Darstellung, IR-Spektrum und Kristallstruktur von AsPh4[MoN(N3)4] Tetrazido-nitrido-molybdate(VI); Preparation, IR Spectrum and Crystal Structure of AsPh4[MoN(N3)4]  
 Abstract    The complex AsPh4[MoN(N3)4] is prepared by the reaction of AsPh4[MoNCl4] with silver azide in dichloromethane suspension in the presence of dry sodium sulfate. The IR spectrum indicates an Mo=N group and four covalently bonded N3 groups for the [MoN(N3)4] e anion. AsPh4[MoN(N3)4] crystallizes in the triclinic space group P1 with two formula units in the unit cell. The crystal structure was solved by X-ray diffraction methods (R = 0,038; 4049 independent reflexions). The structure consists of AsPh4® cations and [MoN(N3)4] e anions. The short MoN bond length of the nitrido ligand (163 pm) corresponds to an Mo = N triple bond. The steric effects of the lone pairs of the a-N atoms of the azido groups with the MoN ligand cause a propellerlike twisted conformation of the four azido groups. 
  Reference    Z. Naturforsch. 35b, 1070—1074 (1980); eingegangen am 15. Mai 1980 
  Published    1980 
  Keywords    Preparation, Tetrazido-nitrido-molybdate(VI), Crystal Structure, IR Spectra 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-1070.pdf 
 Identifier    ZNB-1980-35b-1070 
 Volume    35 
6Author    Tetrachloroplatinate, AsparaginePhilippe Arrizabalaga, Paule Castan, Jean-Pierre LaurentRequires cookie*
 Title    Platinum Blues -a Study of the Interaction between Potassium  
 Abstract    Potassium tetrachloroplatinate and asparagine form a paramagnetic complex in aqueous solution. This complex which displays a blue green color has been studied by ESR and IR spectroscopy. The ESR spectra are interpreted to be due to tervalent platinum in a low spin d 7 configuration. The IR data suggest that the doubly deprotonated ligand is co-ordinated through the COO -and CONH -groups. 
  Reference    Z. Naturforsch. 35b, 1508—1510 (1980); received August 11 1980 
  Published    1980 
  Keywords    Potassium Tetrachloroplatinate, Platinum (III), Asparagine, ESR Spectra, IR Spectra 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-1508.pdf 
 Identifier    ZNB-1980-35b-1508 
 Volume    35 
7Author    M. P. Berthet, H. Vincent, Y. MonteilRequires cookie*
 Title    A New Preparation of S4N4  
 Abstract    Pure S4N4 is prepared by a new method from reduction of S3N3CI3 by various metals (Hg, Cu, Sn). Realized either in an inert solvent or directly in gaseous phase the reaction is complete. The stability range of NSC1 has been determined by Raman spectrometry. Tetrasulfur tetranitride is a very interesting product because it is the starting material for many products containing sulfur and nitrogen. In the usual method S4N4 (1) is prepared by bubbling gaseous ammonia through a solution of sulfur di-chloride dissolved in an inert solvent: 16 NH3 + 6 SCls -> S4N4 + 12 NH4C1 + 2 S Besides S4N4, NH4C1 and S, the S7NH imine is also formed in small quantity. NH4CI is easily eliminated by iced water. The separation of S4N4 from the obtained mixture is difficult. The three compounds (S4N4, S7NH and S) have similar molecular struc-tures (puckered eight-membered rings), they have similar solubilities in solvents and are difficult to separate from one another. The extraction of S4N4 by dioxane permits to partly eliminate sulfur. S4N4 can be purified by chromatography on an alumina column (2), benzene, a good solvent for S4N4, is used for its elution. By sublimation under vacuum it is possible to eliminate sulfur from S4N4, but this method is dangerous due to the explosive character of S4N4. The methods of purification are long and not always very efficient. For the first time, we have prepared S4N4 in a high purity grade from S3N3CI3 which can be easily obtained (3). This new method consists in the action of reducing metals such as Hg, Cu or Sn on S3N3CI3 either in an inert solvent or directly in gaseous phase. The identification and the stability of the different gaseous compounds have been studied by infrared and Raman spectro-scopy. 
  Reference    Z. Naturforsch. 35b, 329—331 (1980); received September 17/November 16 1979 
  Published    1980 
  Keywords    Tetrasulfur Tetranitride Synthesis, Thiazyl Halogenide Decomposition, Metal Reaction, Monothiazyl Chloride Stability, IR Spectra 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0329.pdf 
 Identifier    ZNB-1980-35b-0329 
 Volume    35 
8Author    Helmut Behrens, Jochen Ellermann, EwaldF. HohenbergerRequires cookie*
 Title    Dicarbonyl-, Carbamoyl-carbonyl-und Carbomethoxo-carbonyl-Komplexe des Rhodiums mit tri-und tetratertiären Phosphinliganden [1] Dicarbonyl-, Carbamoyl-carbonyl-and Carbomethoxo-carbonyl Complexes of Rhodium with Tri-and Tetratertiary Phosphine Ligands [1]  
 Abstract    The cationic dicarbonyl complexes [Rh(CO)2(R2PCH2)3CR']PF6 (R = C6H5; R' = CH3, -CH2PR2), formed by high pressure synthesis from RhCl3(H20)3, CO and (R2PCH2)3CR' react with liquid ammonia at 20 °C to give the carbamoyl complexes Rh(CO)(CONH2)(R2PCH2)3CR'. At 100 °C in liquid ammonia the carbamoyl-carbonyl complexes Rh(CO)(CONH2)(R2PCH2)3CR' form the CO-bridged, dinuclear compounds (^-CO)2[Rh(R2PCH2)3CR']2. Upon treatment of Rh(CO)(CONH2)(R2PCH2)3CR' with CH3OH the carbomethoxo carbonyl complexes Rh(CO)(COOCH3)(R2PCH2)3CR' are obtained. The new compounds were characterised, as far as possible, by their IR, Raman and 31 P NMR spectra. 
  Reference    Z. Naturforsch. 35b, 661—668 (1980); eingegangen am 10. Dezember 1979/30. Januar 1980 
  Published    1980 
  Keywords    Rhodium Complexes, Polytertiary Phosphines, IR Spectra, Raman Spectra, 31 P NMR Spectra 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0661.pdf 
 Identifier    ZNB-1980-35b-0661 
 Volume    35 
9Author    Emmanuel Chukwuemeka OkaforRequires cookie*
 Title    Structures of l-Phenyl-3-methyl-pyrazolone-5 and its Benzoyl Derivatives +  
  Reference    Z. Naturforsch. 35b, 1019—1023 (1980); received September 20/December 17 1979 
  Published    1980 
  Keywords    Benzoylated l-Phenyl-3-methyl-pyrazolones-5, NMR Spectra, Mass Spectra, IR Spectra 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-1019.pdf 
 Identifier    ZNB-1980-35b-1019 
 Volume    35 
10Author    Ekkehard Lindner, Günter Von AuRequires cookie*
 Title    Darstellung und Eigenschaften von und Reaktionen mit metallhaltigen Heterocyclen, VII [1] Heterolytische Spaltung der Re-Re-Bindung in den Zweikern-Anionen [(OC)4ReP(R2 )0] 2 2 ~ mit Elektrophilen - ein Weg zu Heterocyclen mit Re-C-o-Bindung Preparation and Properties of, and Reactions with, Metal-Containing Heterocycles, VII [1] Heterolytic Cleavage of the Re-Re Bond in the Binuclear Anions [(0C)4ReP(R2)0]2 2_ with Electrophiles -a Pathway to Heterocycles with Re-C a Bonds  
 Abstract    The preparation of the six-membered rhenacyclohexanes (OC)4ReP(R2)OCH2C(CH3)2CH2 (la, b) [R = CH3 (a), C6H5 (b)J is accomplished by heterolytic cleavage of the Re-Re bond in the binuclear anions [(0C)4ReP(R2)0]2 2 -with strong electrophiles like the alkane-diylbis(triflate) (CH3)2C(CH2Y)2 (Y= OSO2CF3), followed by an attack of the a>-positioned carbenium-like C atom on the phosphinite oxygen of the anion. 1 a, b insert SO2 under ring I I 
  Reference    Z. Naturforsch. 35b, 1104—1110 (1980); eingegangen am 9. Mai 1980 
  Published    1980 
  Keywords    Rhenacyclohexanes, Mechanism, S02-Insertio", X-ray, IR spectra, NMR spectra : 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-1104.pdf 
 Identifier    ZNB-1980-35b-1104 
 Volume    35 
11Author    W. Preetz, G. PetersRequires cookie*
 Title    Darstellung und Charakterisierung der Tetrabutylammoniumsalze von [TC2C18] 2 ", [TC2C18] 3 -und [Te2Br8] 2 - Preparation and Characterization of the Tetrabutylammonium Salts of [TcaClg] 2 -, [Tc2Cl8] 3 -and [Tc2Br8] 2  
 Abstract    The reduction of [TcCL] 2-with Zn in conc. HCl after evaporation and extraction of ZnCl2 by diethylether yields a red-brown product from which after dissolving in dilute HCl by a solution of (TBA)Cl in CH2C12 (TBA)2[Tc2Cl8] and (TBA)3[Tc2Cl8] can be extracted. The separation is achieved by the much better solubility of the green (TBA)2[Tc2Cl8] in acetone compared with that of the grey-blue (TBA)3[Tc2Cl8]. On treatment of (TBA)2[Tc2Cl8] dissolved in acetone with bromine-free conc. HBr carmine red (TBA)2[Tc2Br8] is obtained for the first time. The vibrational spectra are similar and can be assigned according to the assumed D4H-symmetry. In the Raman spectra of both octachloroditechnetates the intensive Tc-Tc-vibration (Aig) is observed at 307 cm -1 , for (TBA)2[Tc2Br8] it is found at 323 cm-1 . The electronic spectrum of (TBA)2[Tc2Cl8] agrees to a high extent with that of the corresponding Re compound. 
  Reference    Z. Naturforsch. 35b, 797—801 (1980); eingegangen am 17. März 1980 
  Published    1980 
  Keywords    Octachloroditechnetate(III), Octachloroditechnetate(II, III), Octabromoditechnetate(III), Raman Spectra, IR Spectra, UVS Spectra 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0797.pdf 
 Identifier    ZNB-1980-35b-0797 
 Volume    35