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'IR spectra' in keywords Facet   Publication Year 1983  [X]
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1983[X]
1Author    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 
2Author    M. Bobadilla, M. MoránRequires cookie*
 Title    Oxidative Addition of Pseudohalogen to [P(OPh)3]4Ni  
 Abstract    The title compound reacts with cyanogen halides, XCN (X = Br or I) to give the com-plexes L2(X)(CN)Ni (L = P(OPh)3, X = Br or I). The oxidative addition of (SCN)2 and (SeCN)2 to the same compound results in the formation of L2Ni(XCN)2 (X = S or Se). All the complexes have been characterized by elemental analysis, and IR, iH NMR and electronic spectra. 
  Reference    Z. Naturforsch. 38b, 1069—1071 (1983); received May 13 1983 
  Published    1983 
  Keywords    Pseudohalogens, IR Spectra, Nickel 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-1069.pdf 
 Identifier    ZNB-1983-38b-1069 
 Volume    38 
3Author    KarlE. Schwarzhans, Herwig SchottenbergerRequires cookie*
 Title    Ferrocenylen-cobaltocenylenium  
 Abstract    hexafluorophosphat [(h 5 :h 5 '-C10H8)2FeCo] [PF6], ein gemischtkerniger Komplex vom Bis(fulvalen)dimetall-Typus Ferrocenylenecobaltocenyleniumhexafluorophosphate [(h 5 : h 5 '-CioH8)2FeCo][PF6], Ferrocenylenecobaltocenylenium-monochloride and ferrocenylenecobaltocenylenium-hexafluorophosphate were prepared under the aspect of influencing the valence averaging phenomena described for homodinuclear metallofulvalenes. Detected paramagnetism of the monocation is assumed to result from such interactions in dibridged rigid metallocenes. The above cation is characterized by IR, CV, MS, electron microprobe and elemental analyses. 
  Reference    Z. Naturforsch. 38b, 1493—1496 (1983); eingegangen am 28. Juni 1983 
  Published    1983 
  Keywords    Ferrocenylenecobaltocenylenium-monochloride, IR Spectra, MS Spectra 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-1493.pdf 
 Identifier    ZNB-1983-38b-1493 
 Volume    38 
4Author    W. Preetz, M. BrunsRequires cookie*
 Title    Darstellung und spektroskopische Charakterisierung von Hexachloroosmat(V)  
 Abstract    (TEA)[OSC16] is formed quantitatively by heating solid £RARAS-(TEA)[OsX4(CO)2] (X = Br, I) in a stream of chlorine at 120 °C, and can be purified by recrystallisation from CH2CI2 without decomposition. It is reduced immediately by acetone, methanol, CU, Br~, I -to give [OsCl6] 2 -. The standard potential [OsCl6] -/[OsCl6] 2 ~ in acetonitrile referred to the saturated mercury-mercurous sulphate electrode is 0.840 V. The IR and Ra bands of (TEA)[OsCl6], assigned according to point group Oh, are shifted to higher frequencies compared with (TEA)2[OsCle]. The excitation at 488.0 nm gives a resonance Raman spectrum exhibiting 6 overtones of vi and combination tones up to 4 J»I + v-0. The electronic absorption spectrum shows five spin-forbidden intraconfigurational transitions coupled with odd vibrational modes in the near infrared region. The spin-allowed 4 A2g -> 4 T2g, 4 Tig-transitions are observed at 347 and 305 nm. The excited levels can be fitted with the parameters A = 28500 cm-1 , B = 340 cm-1 , $ = 2500 cm 4 , allowing to calculate the nephel-auxetic ratio /J55 to 0.47. In the visible region extensive charge transfer transitions are observed. Based on the strong oxidizing character of Os(V) there is a bathochromic shift of corresponding bands of [OsClß]-in relation to [OsC^] 2-of about 6600 cm -1 and to the isoelectronic [ReCle] 2-of about 13700 cm -1 , respectively. From Jitiu->dt2g the optical electronegativity is calculated to a0pt(Os v) — 2.49. 
  Reference    Z. Naturforsch. 38b, 680—686 (1983); eingegangen am 10. Februar 1983 
  Published    1983 
  Keywords    Hexachloroosmate(V), Electronic Spectra, IR Spectra, Raman Spectra 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-0680.pdf 
 Identifier    ZNB-1983-38b-0680 
 Volume    38 
5Author    Hans Sohr, Günter Hanschmann, Hermann UtschikRequires cookie*
 Title    Thermoanalytische, IR-spektroskopische und quantenchemische Untersuchungen an Kristallmodifikationen des Trichlorphons Thermo-analytical, IR-spectroscopical and Quantum-chemical Investigations on Crystal Modifications of Trichlorphone  
 Abstract    Several modifications of trichlorphone can be prepared by recrystallizing the raw substance from various solvents under special conditions. One of these modifications is obviously an optical isomer. The different thermo-analytical behavior of the modifications is probably due to the relative content of distinct dimer species. This interpretation is supported by quantum-chemical calculations and by analysis of infrared spectra. Die phosphor-organische Verbindung 2.2.2-Tri-chlor-1 -hydroxyethyl-dimethyl-phosphonat (Tri-chlorphon, Metrifonat) ist ein seit etwa 30 Jahren bekanntes Insektizid [1], das auch als Arzneimittel für die Behandlung von Schistosomiasis eingesetzt wird [2]. Diese im folgenden als Trichlorphon be-zeichnete Substanz hat nach Schräder [3] einen Schmelzpunkt von 356-357 K. In den meisten Fäl-len hegen jedoch die von verschiedenen Autoren angegebenen Schmelzpunkte um 348-351 K. Bei der Reinigung von Trichlorphonproben durch Umkristallisieren stellten wir fest, daß man je nach den gewählten Bedingungen mehrere Kristallfor-men erhält, deren Schmelzpunkte zwischen 343 und 383 K variieren. Über die Erscheinung der Polymorphie beim Tri-chlorphon sind uns aus der Literatur keine Hinweise bekannt. Das Ziel unserer Untersuchungen war es deshalb, mit Hilfe strukturanalytischer Methoden eine Erklärung für die beobachteten Schmelzpunkts-differenzen zu finden. Von den bisher publizierten physikochemischen Eigenschaften der Substanz sind neben den zahl-reichen Schmelzpunkten hauptsächlich die optische Aktivität und die Bimolekularität als Ausgangs-punkt für eine Strukturanalyse von Bedeutung. Brienne und Jacques [4] gelang die präparative Dar-stellung einer optisch aktiven Form (Drehung [a] 
  Reference    Z. Naturforsch. 38b, 819—824 (1983); eingegangen am 29. November 1982/11. März 1983 
  Published    1983 
  Keywords    Differential Thermal Analysis, IR Spectra, Quantum Chemistry, Polymorphism, Trichlorphone 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-0819.pdf 
 Identifier    ZNB-1983-38b-0819 
 Volume    38 
6Author    Matthias Moll, Behrens* Werner Helmut, Günther Popp, WolfPeter Liehr, FehlhammerRequires cookie*
 Title    Über das [C7H7Fe2(CO)5]--Anion (C7H7 = Cycloheptatrienyl) About the [C7H7Fe2(CO)5]--Anion (C7H7 = Cycloheptatrienyl)  
 Abstract    The extremely unstable anionic complex [C7H7Fe2(CO)6]~ (C7H7 = cycloheptatrienyl) which decomposes in polar solvents under CO elimination to give [C7H7Fe2(CO)s]~ can be prepared by deprotonation of C7H8Fe2(CO)6 (C7H8 = cycloheptatriene) with NaN(SiMe3)2 in CßHe-The NMR spectra of [C7H7Fe2(CO)5]~ show the highly fluctional character of this anion in solution. The X-ray structural parameters of Ph4As[C7H7Fe2(CO)5] (space group P2i/n) can be interpreted in terms of a rotation of the tub shaped C7H7 ring against the CO bridged Fe2(CO)5 fragment in the solid state. Consequently, each iron atom is alternatingly rj 3 -or ^-coordinated to the allyl anion and the diene part, respectively, of the anionic 8n system of the cycloheptatrienyl ring. 
  Reference    Z. Naturforsch. 38b, 1446—1453 (1983); eingegangen am 7. Juni 1983 
  Published    1983 
  Keywords    Cycloheptatrienyl Pentacarbonyl Diferrate, IR Spectra, NMR Spectra, X-Ray 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-1446.pdf 
 Identifier    ZNB-1983-38b-1446 
 Volume    38 
7Author    Ramesh Kapoor, Ramneek SharmaRequires cookie*
 Title    Anhydrous Chromium(III) Carboxylates: Reactions of Cr03 with Carboxylic Acid Anhydrides  
 Abstract    Chromium(VI) oxide reacts with excess of carboxylic acid anhydrides [(RC0)20 where R = CH3, C2H5, n-C3H7 and CHCI2] to give pure chromium(III) carboxylates. Their IR and 1H NMR spectra suggest the presence of two different types of carboxylate groups. Magnetic susceptibility and absorption spectra favour an octahedral geometry around Cr. 
  Reference    (Z. Naturforsch. 38b, 42—44 [1983]; received August 28 1982) 
  Published    1983 
  Keywords    Anhydrous Chromium(III) Carboxylates, Chromium(VI) Oxide, Carboxylic Acid Anhydrides, IR Spectra, Magnetic Moment 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-0042.pdf 
 Identifier    ZNB-1983-38b-0042 
 Volume    38 
8Author    W. Preetz, G. RimkusRequires cookie*
 Title    Darstellung von trans-[PtCl4Br2] 2 -und [PtClsBr] 2 - durch oxidative Addition an [PtCl4] 2 ~ Preparation of Jrarwi-[PtCl4Br2] 2 -and [PtCl5Br] 2 -by Oxidative Addition to [PtCl4] 2 ~  
 Abstract    The oxidative addition of Br2 to [PtCl4] 2-in HBr yields almost pure frans-[PtCl4Br2] 2-, in HCl nearly pure [PtClsBr] 2-, and in CH2C12 by a quantitative and stereospecific reaction completely pure £ram-[PtCl4Br2] 2 ~. This is confirmed by ion exchange chromatography on diethylaminoethyl cellulose and by analysis of the vibrational spectra in comparison with the IR and Raman spectra of the well-known species of the series [PtClnBr6-n] 2_ , n = 0-6. The literature concerning £rans-[PtCl4Br2] 2 ~ and other mixed ligand complexes is critically discussed. 
  Reference    Z. Naturforsch. 38b, 442—445 (1983); eingegangen am 8. Dezember 1982 
  Published    1983 
  Keywords    Oxidative Addition, £rans-Tetrachlorodibromoplatinate(IV), Pentachlorobromoplatinate(IV), IR Spectra, Raman Spectra 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-0442.pdf 
 Identifier    ZNB-1983-38b-0442 
 Volume    38 
9Author    Borislav Bogdanović, Martin Rubach, Klaus SeevogelRequires cookie*
 Title    ?f-Allyl-hydrogensulfidopalladium-und -platin-Komplexe ?7 3 -Allylmetal-Sulfur Complexes, IV [1] ?y 3 -A]lyl-hydrogensulfidopalladium and -platinum Complexes  
  Reference    Z. Naturforsch. 38b, 592—598 (1983); eingegangen am 28. Dezember 1982 
  Published    1983 
  Keywords    r/ 3 -Allyl-hydrogerisulfklopalladium Complexes, r/ 3 -Allyl-hydrogensulfidoplatinum Complexes, IR Spectra, Raman Spectra, NMR Spectra 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-0592.pdf 
 Identifier    ZNB-1983-38b-0592 
 Volume    38