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1Author    V. Ogler, F. Ranz, A. N. EugebauerRequires cookie*
 Title    H elm u t  
 Abstract    The striking similarities of the hypsochromic shifts of the longest wavelength absorption o b ­ served in the serie 1—3 and 4 —6 are rationalized by means o f sim ple molecular orbital theory. 
  Reference    Z. Naturforsch. 39b, 1790—1794 (1984); received May 10 1984 
  Published    1984 
  Keywords    Electronic Spectra, Betaines, Verdazyls 
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 TEI-XML for    default:Reihe_B/39/ZNB-1984-39b-1790.pdf 
 Identifier    ZNB-1984-39b-1790 
 Volume    39 
2Author    Sn Bakalova, A. Georgieva, P. Nikolov, E. StanoevaRequires cookie*
 Title    Dihydronaphthalenone Carboxylates - Spectral Characteristics and Structure  
 Abstract    The absorption and luminescence characteristics of a group of newly synthesized methyl esters of 2-alkyl (p-substituted-aryl) -aminomethylene-3,4-dihydro-l(2 H)-naphthalenone-4-carboxylic acids have been investigated. The studied compounds may exist in three tautomeric forms. On the basis of comparison of their electronic spectra to those of similar substances, the observed substituent effect on the position of the UV-VIS absorption bands, the IR spectra and the results of PPP-SCF-CI quantum-chemical calculations it is concluded that the keto tautomer predominates in solution. 
  Reference    Z. Naturforsch. 52a, 457—461 (1997); received December 31 1996 
  Published    1997 
  Keywords    Electronic spectra, Tautomerism, Dihydronaphthalenone carboxylates 
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 TEI-XML for    default:Reihe_A/52/ZNA-1997-52a-0457.pdf 
 Identifier    ZNA-1997-52a-0457 
 Volume    52 
3Author    Karin Oldenburg, Arnd VoglerRequires cookie*
 Title    Electronic Spectra and Photochemistry of Tin(II), Lead(II), Antimony(III), and Bismuth(III) Bromide Complexes in Solution  
 Abstract    The electronic spectra o f brom o complexes o f main group metal ions with an s2 electronic configuration (SnBr3~, PbBr3~, PbBr42_, SbBr4~, SbBr63~, BiBr4~, BiBr63~) in acetonitrile show long-wavelength absorption bands which are assigned to metal-centered sp transitions. C om ­ pared to the corresponding chloro complexes the sp bands o f the bromo complexes appear at longer wavelength due to sp/LM C T mixing (LM CT = ligand-to-metal charge transfer). As a result o f this mixing the luminescence which originates from low-energy sp excited states is much weaker than that o f the chloro complexes. M oreover, some o f the bromo complexes (e.g. BiBr4~) undergo a photochemical redox decom position induced by LMCT excitation. 
  Reference    Z. Naturforsch. 48b, 1519—1523 (1993); received July 1 1993 
  Published    1993 
  Keywords    Electronic Spectra, Bromo Complexes, Main Group M etals, Photochemistry 
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 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-1519.pdf 
 Identifier    ZNB-1993-48b-1519 
 Volume    48 
4Author    Z. NaturforschRequires cookie*
 Title    Darstellung, Eigenschaften und elektronische Raman-Spektren von Di(bromo)phthalocyaninatometallaten(III) der Eisengruppe  
 Abstract    Synthesis, P ro p erties an d E lectronic R am an Spectra of D i(b ro m o)p h th alo cy an in ato m etalates(III) of the Iron G roup E lem ents Svend Sievertsen, H en d rik Schlehahn, H ein er H om borg Low spin di(bromo)phthalocyaninatometalates of tervalent iron, ruthenium and osmium ([MBr2Pc2-]') are formed by the reaction of [FeBrPc2~] or H[MBr2Pc2 ] (M = Ru, Os) with ex­ cess bromide in DMF or THF and isolated as ("Bu4N)+ salts. The electronic spectra show the typical J i-jr*-transitions (B, Q, N region) of the Pc2~ ligand together with a number of extra bands due to trip-multiplett and (Pc, Br — » M)CT transitions. vs(MBr) is observed in the resonance Raman (RR) spectrum (RR enhanced for M = Fe, Ru) at 161 cm-1 (Fe), 183 cm4 (Ru) and 192 cm-1 (Os), vas(MBr) at 251 cm4 (Fe), 234 cm-1 (Ru) and 218 cm-1 (Os) in the FIR spectra. The RR spectra obtained by excitation at low absorbance between the B and Q region are dominated by the intraconfigurational 'T 7 — > r 8" transition due to spin orbit split­ ting of the 2T2g ground state for Fe at 583 cm-1, Ru at 1026/1050 cm-1 and Os at 3131 cm4 . In the MIR resp. NIR spectra vibronically induced transitions are observed for the Ru or Os complex. 
  Reference    (Z. Naturforsch. 49b, 50—56 [1994]; eingegangen am 31. August 1993) 
  Published    1994 
  Keywords    Phthalocyanines, Electronic Spectra, Vibrational Spectra, Electronic Resonance Raman Spectra 
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 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-0050.pdf 
 Identifier    ZNB-1994-49b-0050 
 Volume    49 
5Author    G. C. Papavassilioua ', G. A. Mousdis3, A. Terzisb, C. P. RaptopoulouhRequires cookie*
 Title    Similar Compounds  
 Abstract    The title compounds (natural low-dimensional semiconductor systems) exhibit strong exci­ tonic optical absorption bands in the UV spectral region, because of the quantum confinement of excitons, as in the cases of bivalent-metal and trivalent-metal halide complexes. The excitonic bands are shifted to longer wavelengths, approaching those of the corresponding bulk materials, as the anion-size or the anion-dimensionality increases. 
  Reference    (Z. Naturforsch. 54b, 109—112 [1999]; received July 3 1998) 
  Published    1999 
  Keywords    Main Group Metal-Halide Complexes, Electronic Spectra, Excitons 
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 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-0109.pdf 
 Identifier    ZNB-1999-54b-0109 
 Volume    54 
6Author    Z. NaturforschRequires cookie*
 Title    Structural and Spectroscopic Characterization of Two New Cu(II)-Dipeptide Complexes  
 Abstract    Two new Cu(II) complexes of stoichiometry [Cu(L-dipept)], containing as ligands the dipep­ tides L-alanine-L-valine and L-alanine-L-phenylalanine were prepared. They were character­ ized by single crystal X-ray diffractometry, and infrared and electronic spectroscopy. Both crystallize in the orthorhombic space group P2i2i2i with Z = 4. The Cu(II) ion has essentially the same elongated pyramidal coordination, being equatorially cis coordinated by a N2O2 ar­ rangement of ligand atoms and axially by a carbonyl oxygen atom. The compounds show rather similar polymeric structures that differ from each other basically in the dihedral angle between adjacent N2O2 planes. The infrared and electronic spectra are briefly discussed on the basis of the structural characteristics of the complexes. Superoxide dismutase-like activity was tested for both compounds. 
  Reference    Z. Naturforsch. 55b, 1157—1162 (2000); received July 4 2000 
  Published    2000 
  Keywords    Copper(II)-Dipeptide Complexes, Electronic Spectra, SOD Activity 
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 TEI-XML for    default:Reihe_B/55/ZNB-2000-55b-1157.pdf 
 Identifier    ZNB-2000-55b-1157 
 Volume    55 
7Author    Requires cookie*
 Title    Spectroscopic Behaviour of Quasi-One-Dimensional Linear Chains in MgPt(CN)4 * 7 H ,0 Single Crystals  
 Abstract    H a r t m u t Y e r s i n a n d G ü n t e r G l i e m a n n In stitu t In the direction of the crystallographic c-axis MgPt(CN)4 • 7 H 20 has a relatively low P t-P t-distance (3.15 A at 300 °K). Thus the optical behaviour shows inter-molecular interactions. Single crystal polarized emission and absorption spectra were measured between 300 °K and 5 °K. In this tem perature range the emission peaks shift to the red by about 1,100 cm-1. This is attributed to a decrease in Pt-Pt-distance. MgPt(CN)4 • 7 H 20 undergoes phase transitions at about 166 °K and 60 °K. To interprete the solid state emission and absorption behaviour the Davydov theory is applied. The two lowest excited bands of electronic origin are assigned to the symmetries r ^ f k) and r ^ u(k) in the double group Dgh. 
  Reference    (Z. Naturforsch. 30b, 183—190 [1975]; received December 27 1974) 
  Published    1975 
  Keywords    Electronic Spectra, Phase Transitions, Davydov Splitting 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0183.pdf 
 Identifier    ZNB-1975-30b-0183 
 Volume    30 
8Author    H.-H Perkampus, E. SchönbergerRequires cookie*
 Title    Untersuchungen über die Wechselwirkung von Aromaten mit Antimontrichlorid, IV* Elektronenspektroskopische Untersuchung zur Frage der Farbigkeit der Molekülverbindung ArH * 2 SbCl3 Investigations about the Interaction of Aromatic Compounds with Antimonytrichloride, IV* Elektronspectroscopical Investigation about the Colour of the Aromatics * 2 SbCl3 Complexes  
 Abstract    Contrary to the published results it is shown the colour of the solid molecular complexes arene • 2 SbCl3 is due to impurities in these systems. These impurities are mainly the radical ions of the aromatic compounds. If the formation of these radical ions is avoided the complexes in the solid state are colourless or slightly yellow-coloured. 
  Reference    (Z. Naturforsch. 31b, 73—75 [1976]; eingegangen am 13. September 1975) 
  Published    1976 
  Keywords    Electronic Spectra, Solution, Solid State, Radicalions, Aromatic Compounds 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-0073.pdf 
 Identifier    ZNB-1976-31b-0073 
 Volume    31 
9Author    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 
10Author    G. C. Papavassiliou, D. LayekRequires cookie*
 Title    Resonance Raman and Electronic Spectra of Mixed Valence Compounds with Ni(II) ---X-Ni(rV) and Ni(II)—X-Pt(IY) Chains (X = C1 or Br)  
 Abstract    The resonance Raman and electronic spectra of compounds Ni(en)2X3, Ni(dapn)2X3 etc. and of compounds [Ni(en)2Pt(en)2X2](C104)4 (where X = Cl or Br) show that these are mixed valence compounds with a metal halide chain (en = 1,2-diaminoethane, dapn = 1,2-diaminopropane). 
  Reference    Z. Naturforsch. 37b, 1406—1409 (1982); received July 7 1982 
  Published    1982 
  Keywords    Resonance Raman Spectra, Electronic Spectra, Mixed Valence Compounds 
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 TEI-XML for    default:Reihe_B/37/ZNB-1982-37b-1406.pdf 
 Identifier    ZNB-1982-37b-1406 
 Volume    37 
11Author    H. S. Sangari, G. S. Sodhi, N. K. Kaushik, R. P. SinghRequires cookie*
 Title    Bis(?? 5 -cyclopentacüenyl)N,N-Disiibstituted Dithiocarbamato(cUoro)oxomolybdeniim(VI) Complexes  
 Abstract    Bis(?j 5 -cyclopentadienyl)N,N-disubstituted Dithiocarbamato(chloro)oxomolybdenum(VI) complexes of the type (C5H5)2MoO(S2CNR2)C1 and (CsHshMoO^CNRR'JCl where R = Me, Et, «'-Pr and R' = cyclohexyl (cyhx) have been prepared by the reaction of stoichio- metric amounts of bis(^5-cyclopentadienyl)oxomolybdenum(VI) dichloride with sodium dichio-thiocarbamates in refluxing dichloromethane. Infrared spectral studies demonstrate that in these complexes, the dithiocarbamate ligands are bidentate. Hence a coordination number of 7 may be assigned to the molybdenum(VI) atom in each case. In addition to infrared studies, electronic spectra, NMR studies, magnetic susceptibility, elemental analyses and conductance measurements have been carried out for these complexes. 
  Reference    Z. Naturforsch. 35b, 1254—1256 (1980); received May 9 1980 
  Published    1980 
  Keywords    Complexes, Electrical Conductance, Magnetic Susceptibility, Electronic Spectra, NMR Spectra 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-1254.pdf 
 Identifier    ZNB-1980-35b-1254 
 Volume    35 
12Author    Thomas Gerdau, Reinhard KramolowskyRequires cookie*
 Title    Koordinationschemie von Liganden mit den Donatoren Phosphor und Schwefel, I Nickel(II)-Komplexe mit Phosphinomethylthioethera als Liganden Gleichgewicht zwischen planarem und tetraedrischem Nickel(II) Coordination Chemistry of Ligands with the Donors Phosphorus and Sulfur, I Nickel(II) Complexes with Phosphinomethylthioethers as Ligands A Planar-Tetrahedral Equilibrium with Nickel(II)  
 Abstract    The preparation and structural characterization of phosphinomethylthioethernickel(II) complexes of the general type [NiX2(Ph2PCH2SR)2] (X = CI, Br, I, NCS: R = Me, Ph) are reported. In all the complexes the phosphinomethylthioethers act as monodentate ligands coordinating via the phosphorus atom. The isothiocyanate complexes are diamagnetic both in solution and in the solid state and have been assigned trans-planar configuration. As shown by magnetic measurements and by electronic spectroscopy, the halo complexes exhibit a square-planar (diamagnetic) ^ distorted-tetrahedral (paramagnetic) equilibrium in solution, while in the solid state the complexes are either square-planar or distorted-tetrahedral. For the complex [NiBr2(Ph2PCH2SMe)2] both isomers have been isolated in the solid state. 
  Reference    Z. Naturforsch. 37b, 332—340 (1982); eingegangen am 20. November 1981 
  Published    1982 
  Keywords    Phosphinomethylthioethernickel(II) Complexes, Planar-Tetrahedral Equilibrium, Electronic Spectra, Magnetic Properties 
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 TEI-XML for    default:Reihe_B/37/ZNB-1982-37b-0332.pdf 
 Identifier    ZNB-1982-37b-0332 
 Volume    37 
13Author    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 
14Author    E. G. Ferrer, E. J. BaranRequires cookie*
 Title    Neue ternäre Vanadyl(IV) Komplexe mit A D P und AMP New Ternary Vanadyl(IV) Complexes with A D P and AMP  
 Abstract    Four new ternary V 0 2+ complexes, [VO HADP-dipy], 6 H 20 , [VO HADP-ophen], 6 H 20 , [VO AMP-dipy], 6 H 20 and [VO AMP-ophen]. 6 H 20 (diny: a.a'dipyridyl; ophen: o-phe-nanthroline) were prepared and characterized by chemical analyses, electronic and vibrational spec­ tra. Their bonding peculiarities are briefly discus­ sed. 
  Reference    Z. Naturforsch. 50b, 851—853 (1995); eingegangen am 13. September 1994 
  Published    1995 
  Keywords    Vanadyl(IV), Adenosine Diphosphate, Adenosine Monophosphate, Mixed Complexes, IR Spectra, Electronic Spectra 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-0851_n.pdf 
 Identifier    ZNB-1995-50b-0851_n 
 Volume    50 
15Author    Somluck Ruangsuttinarupap, Claus Friebel, Kurt DehnickeRequires cookie*
 Title    Synthese, IR-, EPR-und Elektronenspektren der Dischwefel-dinitrid-Komplexe [CUC1 2 (CH 3 CN)] 2 -(/I-S 2 N 2 ) und [CuCl 2 ] 2 * (/I-S 2 N 2 ) Synthesis, IR, EPR, and Electronic Spectra of the Disulfur Dinitride Complexes [CUC1 2 (CH 3 CN)] 2 * (w-S 2 N 2 ) and [CuCl 2 ] 2 -(w-S 2 N 2 )  
 Abstract    [CuCl 2 (CH 3 CN)] 2 -(W-S 2 N 2) is prepared by the reaction of trithiazyl chloride with CuCl in acetonitrile solution. Thermolysis at 120 °C yields [CuCl 2 ] 2 -(W-S 2 N 2). The complexes are charac-terized by their IR, EPR, and electronic spectra. 
  Reference    Z. Naturforsch. 42b, 337—340 (1987); eingegangen am 24. November 1986 
  Published    1987 
  Keywords    Disulfur Dinitride Complexes of Copper(II), EPR Spectra, Electronic Spectra, Synthesis, IR Spectra 
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 TEI-XML for    default:Reihe_B/42/ZNB-1987-42b-0337.pdf 
 Identifier    ZNB-1987-42b-0337 
 Volume    42 
16Author    Z. NaturforschRequires cookie*
 Title    Über die Darstellung sowie Elektronen-und CD-Spektren der Co(I)-Form einiger natürlicher Corrinoide  
 Abstract    Synthesis and S pectra (E lectronic, C D) o f the C o(I) F o rm o f Several N atu ra l C orrinoids M atthäus M oskophidis Several natural corrinoids, cobalam in, 5-hydroxybenzim idazolyl cobam ide (factor III), adenyl cobam ide (pseudovitam in Bi2), 2-m ethyladenyl cobam ide (factor A) and cobyric acid, were reduc­ ed with sodium borohydride. The reduction o f cyanocobalam in is slow as com pared with that o f factor III and especially o f the other corrinoids under study. At longer wavelengths (A > 300 nm) the electronic spectra o f the Co(I)-corrinoids are nearly identical. The same is to say about the CD-spectra o f the Co(I)-corrinoids examined. 
  Reference    Z. Naturforsch. 34c, 689 (1979); eingegangen am 19. Februar/9. April 1979 
  Published    1979 
  Keywords    Vitamin B12, B12-Analogues, Co(I)-corrinoids, Electronic Spectra, CD-Spectra 
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 TEI-XML for    default:Reihe_C/34/ZNC-1979-34c-0689.pdf 
 Identifier    ZNC-1979-34c-0689 
 Volume    34