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61Author    Vibrational Spectra, Sandra Loss, Caroline RöhrRequires cookie*
 Title    RbAsF6, CsA sF 6 und RbSbF6: Kristallstrukturen, Thermische Phasenumwandlungen und Schwingungsspektren RbAsF6, CsAsF6 and RbSbF6: Crystal Structures, Thermal Phase Transitions  
 Abstract    The title compounds are isostructural to CsSbFö and crystallize with the KOsFö structure type (space group RS, Z = 3) with the lattice constants a = 749.7(1) pm, c = 758.9(1) pm (RbAsFö), a = 772.3(1) pm, c = 805.0(1) pm (CsAsFö) and a = 767.0(1) pm, c = 786.1(2) pm (RbSbF6). The structures exibit nearly ideal [MFö]-octahedra, the alkaline cations are coordinated by 12 fluorine ions in a distorted cuboctahedral geometry. Cations and complex anions form a slightly distorted CsCl arrangement. On heating, the arsenates transform to a NaCl arrangement with disordered [AsF6] ions, whereas the antimonates of Rb and Cs form the corresponding disordered CsCl type at higher temperatures. The phase transitions and the i. r. and Raman spectra as well as the structural relations to the remaining hexafluoropnictates A![MVF6] are discussed. 
  Reference    (Z. Naturforsch. 53b, 75—80 [1998]; eingegangen am 14. Oktober 1997) 
  Published    1998 
  Keywords    Alkaline Hexafluoropnictates, Crystal Structure, Thermal Phase Transitions, Vibrational Spectra 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-0075.pdf 
 Identifier    ZNB-1998-53b-0075 
 Volume    53 
62Author    C. Drewes, W. PreetzRequires cookie*
 Title    Darstellung und spektroskopische Charakterisierung von Methylnitro  
 Abstract    -c/oso-hexaboraten sowie Kristallstrukturen von cis-(Ph4As)2[B6H4(CH3)(N02)],/ac-(Ph4As)2[B6H3(CH3)(N02)2] CH3CN und /ner-(Ph4P)2[B6H3 (CH3)(N 02)C 2] Synthesis and Spectroscopic Characterization o f Methylnitro-c/oso-hexaborates and Crystal Structures o f m -(P h 4 As)2 [B6H4 (CH3) (N 0 2)],/flc-(P h4A s)2 [B6H3(CH3)(N 0 2)2] • CH3CN and mer-(Ph4 P)2 [B6H3(CH3) (N 0 2)c2] Methylnitrotetrahydro-c/<m>-hexaborate(2-), Methyldinitr0trihydr0-c/as'0-hexab0rate( 
  Reference    Z. Naturforsch. 54b, 349—356 (1999); eingegangen am 11. November 1998 
  Published    1999 
  Keywords    ), Crystal Structure, 11B NMR Spectra, Vibrational Spectra 
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 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-0349.pdf 
 Identifier    ZNB-1999-54b-0349 
 Volume    54 
63Author    Svend Sievertsen, Lutz Galich, Heiner HomborgRequires cookie*
 Title     
 Abstract    l e c t r o n i c R a m a n S p e c tr a o f a L o w -S p in F e r a P o r p h y r i n a n d R e e x a m in a tio n o f th e V ib r a t i o n a l S p e c tr a o f K 3[F e (C N)6] a n d [F e (C 5H 5)2]B F4 The resonance Raman spectra of (nBu4N)[Fe(CN)2TPP] (("BiitN): tetra(n-butyl)ammonium; TPP: m-tetraphenylporphyrin), K3 [Fe(CN)6] and [Fe(C5H5)2]BF4 have been investigated. A molec­ ular electronic Raman (ER) effect at 545 cm"1 is observed for (nBu4N)[Fe(CN)2TPP]. The transi­ tion occurs between lower 'TV' and upper 'Tg" level of the spin-orbit split ground state assuming pseudo-octahedral symmetry. In contrast to earlier studies no ER effect is detected for K3[Fe(CN)6] and [Fe(C5H5)2]BF4. For Raman shifts < 800 cm-1 only one strong Raman line is observed for [Fe(C5H5)2]BF4 at 311 cm-1, assigned to the iron ring stretch designated by u4 (aig in D5(j). Due to a phase transition of K3[Fe(CN)6], two additional strong vibrational lines at 329 and 352 cm-1 appear in the Raman spectrum taken at 10 K. Their intensities show A "term" behaviour of the resonance Raman effect with overtones and combinations for both lines. These are components of the vibronic combinations with the i/6, vi, and i/g modes (tiu in Oh) in the IR spectra, too. 
  Reference    Z. Naturforsch. 50a, 881—887 (1995); received May 26 1995 
  Published    1995 
  Keywords    Di(cyano)-m-tetraphenylporphinatoferrate(III), Hexacyanoferrate(III), Ferricenium, Electronic Raman Spectra, Vibrational Spectra 
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 TEI-XML for    default:Reihe_A/50/ZNA-1995-50a-0881.pdf 
 Identifier    ZNA-1995-50a-0881 
 Volume    50 
64Author    Jochen Ellermann, AlfonsA M DemuthRequires cookie*
 Title    Chemistry of Poly functional Molecules, 75 [1] The Reaction of 5-Bromo-uracil with Sodium Diphenylphosphide  
 Abstract    5-Bromo-uracil (1) reacts with sodium diphenylphosphide or a mixture of sodium diphenylphosphide and sodium amide in liquid ammonia to give sodium 5-bromo-uracilate (5 a). From water 5 a crystallizes with one mole H2O yielding 5b. Treatment of 5 a with D2O yields sodium 5-bromo-N-deutero-uracilate-D20 (1/1) (5 c). With chlorodiphenyl-phosphine 5a forms 1-diphenylphosphino-uracil (2). 5a, b, c show N(l)-N(3)-(H/D)-tauto-merism in concentrated D2O solutions already, but in DMSO or Dö-DMSO only in dilute solutions. All the compounds were characterized by infrared, Raman, X H NMR, UV spectra and conductometry. 
  Reference    Z. Naturforsch. 38b, 1568—1574 (1983); eingegangen am 6. Juni/2. August 1983 
  Published    1983 
  Keywords    Sodium 5-Bromo-uracilates, Deutero Derivatives, Tautomerism, NMR Spectra, UV Spectra, Vibrational Spectra 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-1568.pdf 
 Identifier    ZNB-1983-38b-1568 
 Volume    38 
65Author    M. C. Apella, E. J. BaranRequires cookie*
 Title    Röntgenographische und spektroskopische Untersuchung einiger gemischter Magnesium/Calcium-Fluoroapatite X-Ray and Spectroscopic Investigation of Some Mixed Magnesium/Calcium Fluoroapatites  
 Abstract    Crystallographic data for m ixed apatites o f general formula M g< .Ca10.t.(Po4)fiF2 (x — 1 — 4) have 
  Reference    Z. Naturforsch. 39b, 449 (1984); eingegangen am 28. N ovem ber 1983 
  Published    1984 
  Keywords    M ixed A patites, Crystal D ata, Vibrational Spectra, Hard Tissues 
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 TEI-XML for    default:Reihe_B/39/ZNB-1984-39b-0449.pdf 
 Identifier    ZNB-1984-39b-0449 
 Volume    39 
66Author    Jochen Ellermann, Adolf VeitRequires cookie*
 Title    Chemie polyfunktioneller Moleküle, 90 [1] Antimon-, sauerstoff-, schwefel-und selenhaltige Käfigverbindungen mit Adamantan-, Noradamantan-und Nortricyclan-Struktur Chemistry of Polyfunctional Molecules, 90 [1] Cage Compounds with Adamantane-, Noradamantane-and Nortricyclane-Structure Containing Antimony, Oxygen, Sulfur and Selenium  
 Abstract    R eactions o f l,l,l-tris(d ich lorostib in om eth yl)eth an e, CH 3C (C H 2SbCl2)3 (1), with water afford, depending on the molar ratios o f the com ponents, the adamantane structured C H 3C (C H 2SbO)3 (2) or Sb40 6, whereas with H 2S only the heteroadam antane CH 3C (C H 2SbS)3 (3) is obtained. With N aSeH com pound 1 forms C H 3C (C H 2SbSe)3 (4) accom panied by the heteronoradamantane C H 3C (C H 2Sb)3Se2 (5). Several attem pts to prepare an antimony and tellurium containing adam antane or noradamantane failed, as 1 was reduced by Na2Te yielding the heteronortricyclane CH 3C (C H 2Sb)3 (6). O xidation o f the latter in tetrahydrofuran by air gives Sb40 6. The new com pounds have been characterized by m ass, infrared, Ram an, and as far as possible, by 'H N M R spectroscopy. 
  Reference    Z. Naturforsch. 40b, 948 (1985); eingegangen am 9. April 1985 
  Published    1985 
  Keywords    H etero Cage Com pounds, A ntim ony, Mass Spectra, 'H NM R Spectra, Vibrational Spectra 
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 TEI-XML for    default:Reihe_B/40/ZNB-1985-40b-0948.pdf 
 Identifier    ZNB-1985-40b-0948 
 Volume    40 
67Author    M. Somer, W. Hönle, H. G. Von SchneringRequires cookie*
 Title    Darstellung, Kristallstruktur und Schwingungsspektren von Cs3A s7 und Cs3(NH3)A s7 Syntheses, Crystal Structure and Vibrational Spectra of Cs3As7 and Cs3(NH3)As7  
 Abstract    Cs3A s7, a com pound with cage-like A s73" anions, has been prepared from the elem en ts in sealed quartz am poules at 820 K. The ruby-red com pound undergoes a first order phase transition at 640 K and is obtained as m icrocrystalline samples. The structure o f the low-tem perature a-m odification is not known, but /3-Cs3A s7 belongs to the plastically crystalline ß -R b 3P7 type o f 
  Reference    Z. Naturforsch. 44b, 296 (1989); eingegangen am 15. Novem ber 1988 
  Published    1989 
  Keywords    Tricesium heptaarsenide, Tricesium am m oniateheptaarsenide, Crystal Structure, Vibrational Spectra, H eptaarsanortricyclene Anion 
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 TEI-XML for    default:Reihe_B/44/ZNB-1989-44b-0296.pdf 
 Identifier    ZNB-1989-44b-0296 
 Volume    44 
68Author    Jochen Ellermann, FalkA. Knoch, KlausJ. MeierRequires cookie*
 Title    Chemie polyfunktioneller Moleküle, 106 [1] Kupfer(I)halogenid -Komplexe des Bis(diphenylphosphino)amins Chemistry o f Polyfunctional Molecules, 106 [1] Copper(I) Halide Complexes of Bis(diphenylphosphino)amine  
  Reference    Z. Naturforsch. 45b, 1657—1668 (1990); eingegangen am 29. Mai 1990 
  Published    1990 
  Keywords    Copper(I) Halides, Organophosphine Ligands, X-Ray Structure, Vibrational Spectra, N M R Spectra 
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 TEI-XML for    default:Reihe_B/45/ZNB-1990-45b-1657.pdf 
 Identifier    ZNB-1990-45b-1657 
 Volume    45 
69Author    W. Preetz, A. WendtRequires cookie*
 Title    Darstellung, Schwingungsspektren und Normalkoordinatenanalyse der Chloro-Bromo-Technetate(IV), ITcCl^B^.J2-, n = 0 -6  
 Abstract    The mixed chloro-brom o-technetates(IV), [TcCl"Br6_J2_, n = 1 -5 , have been separated for the first time by ion exchange chromatography on diethylaminoethyl-cellulose. Due to the stronger trans-effect o f Br as compared to Cl, the ligand exchange reactions o f [TcBr6]2" with HC1 and o f [TcClJ2-with HBr proceed stereospecifically, to form either cis/fac-or trans/mer-species for n = 2, 3, 4, respectively. To avoid photoisom erization the com pounds have to be handled in the absence o f light. The IR and Raman spectra o f the ten chloro-bromo-techne-tates(IV), including the pure geometrical isomers, have been recorded at low temperature (80 K) and completely assigned to structures o f point groups O h, D 4h, C4v, C3v, and C2v, sup­ ported by normal coordinate analysis based on a general valence force field. Due to the differ­ ent /ra«s-influences C l< Br in asymmetric C l'-T c -B r ' axes, the T c -B r ' bonds are strength­ ened and the T c -C l' bonds are weakened, as indicated by valence force constants, for T c -Br' on average 6% higher and for T c -C l' 10% lower, as compared with the values calculated for symmetric Br—T c— Br and C l-T c —Cl axes, respectively. 
  Reference    Z. Naturforsch. 46b, 1496—1502 (1991); eingegangen am 15. Mai 1991 
  Published    1991 
  Keywords    Chloro-Bromo-Technetates(IV), Stereoisomers, /ra«s-Effect, /ra«5-Influence, Vibrational Spectra 
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 TEI-XML for    default:Reihe_B/46/ZNB-1991-46b-1496.pdf 
 Identifier    ZNB-1991-46b-1496 
 Volume    46 
70Author    W. Preetz, A. WendtRequires cookie*
 Title    Darstellung, Schwingungsspektren und Normalkoordinatenanalyse der Chloro-Bromo-Technetate(IV), ITcCl^B^.J2-, n = 0 -6  
 Abstract    The mixed chloro-brom o-technetates(IV), [TcCl"Br6_J2_, n = 1 -5 , have been separated for the first time by ion exchange chromatography on diethylaminoethyl-cellulose. Due to the stronger trans-effect o f Br as compared to Cl, the ligand exchange reactions o f [TcBr6]2" with HC1 and o f [TcClJ2-with HBr proceed stereospecifically, to form either cis/fac-or trans/mer-species for n = 2, 3, 4, respectively. To avoid photoisom erization the com pounds have to be handled in the absence o f light. The IR and Raman spectra o f the ten chloro-bromo-techne-tates(IV), including the pure geometrical isomers, have been recorded at low temperature (80 K) and completely assigned to structures o f point groups O h, D 4h, C4v, C3v, and C2v, sup­ ported by normal coordinate analysis based on a general valence force field. Due to the differ­ ent /ra«s-influences C l< Br in asymmetric C l'-T c -B r ' axes, the T c -B r ' bonds are strength­ ened and the T c -C l' bonds are weakened, as indicated by valence force constants, for T c -Br' on average 6% higher and for T c -C l' 10% lower, as compared with the values calculated for symmetric Br—T c— Br and C l-T c —Cl axes, respectively. 
  Reference    Z. Naturforsch. 46b, 14961—1502 (1991); eingegangen am 15. Mai 1991 
  Published    1991 
  Keywords    Chloro-Bromo-Technetates(IV), Stereoisomers, /ra«s-Effect, /ra«5-Influence, Vibrational Spectra 
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 TEI-XML for    default:Reihe_B/46/ZNB-1991-46b-1496_A1b.pdf 
 Identifier    ZNB-1991-46b-1496_A1b 
 Volume    46 
71Author    Jochen Eilermann, HelmutA. LindnerRequires cookie*
 Title    Komplexchemie polyfunktioneller Liganden, 52 [1] Hydrido-und Deuterido-mangan(I)-carbonyl  
 Abstract    Komplexe des 1.1.1-Tris (diphenylphosphinomeihy 1) e thans Complex Chemistry of Polyfiinctional Ligands, 52 [1] Hydrido-and Deuterido-manganese(I)-carbonyl Complexes of 1,1,1 -Tris(diphenylphosphinomethyl)ethane 
  Reference    Z. Naturforsch. 34b, 799—804 (1979); eingegangen am 26. März 1979 
  Published    1979 
  Keywords    Deuterido-manganese(I)-carbonyl Complexes, 1, 1, 1 -Tris(diphenylphosphinomethyl)ethane, Vibrational Spectra, 31 P NMR, NMR 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0799.pdf 
 Identifier    ZNB-1979-34b-0799 
 Volume    34 
72Author    Jochen Ellermann, Martin Lietz, Peter Merbach, Gerhard Thiele, Gerd ZoubekRequires cookie*
 Title    Chemie polyfunktioneller Liganden, 53 [1] Über methyl-substituierte Triarsa-trioxa-, Triarsa-trithia- und Triarsa-triaza-adamantane und über den stark aufgeweiteten Adamantan-Käfig im Schwefel-Derivat Chemistry of Polyfunctional Ligands, 53 [1] About Methyl-substituted Triarsa-trioxa-, Triarsa-trithia-and Triarsa-triaza-adamantanes and about the Strongly Spread Adamantane Cage in the Sulfur Derivative  
 Abstract    The reaction of l,l,l-tris(diiodarsinomethyl)ethane, CH3C(CH2Asl2)3 (1), with H2O, H2S and CH3NH2 in THF gives the adamantane cage compounds CH3C(CH2ASO)3 (4), CH3C(CH2ASS)3 (5) and CH3C(CH2ASNCH3)3 (6) in high yields. The crystal structure of 5 has been determinated by X-ray diffraction. The unit cell (space group P2i/w) contains 4 isolated molecules in a cubic closest packing. The heteroadamantane 5 has an enlarged cage structure with extremely spread C-C(H2)-As bond angles of 124° at the methylene carbon atoms. Some pharmacological properties of the adamantane derivatives 4 and 5 have been studied. All compounds have been characterized by mass spectrometry and infrared, Raman and X H NMR spectroscopy. 
  Reference    Z. Naturforsch. 34b, 975—982 (1979); eingegangen am 26. März 1979 
  Published    1979 
  Keywords    Heteroadamantanes, Vibrational Spectra, Mass Spectra, X H NMR, Molecular and Crystal Structure 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0975.pdf 
 Identifier    ZNB-1979-34b-0975 
 Volume    34 
73Author    Jochen Eilermann, Martin LietzRequires cookie*
 Title    Chemie polyfunktioneller Liganden, 60 [1] Über Käfigverbindungen mit den Heteroelementen Arsen und Selen Chemistry of Polyfunctional Ligands, 60 [1] On Cage Compounds with the Heteroelements Arsenic and Selenium  
 Abstract    The reaction of l,l,l-tris(diiodoarsinomethyl)ethane, CH3C(CH2Asl2)3 (1) with NaAs(CeH5)2 in the molar ratio of 1:3 gives 4-methyl-l,2,6-triarsa-tricyclo[2,2,l,0 2 -6 ]-heptane, CH3C(CH2As)3 (2). The previously synthesized CH3C(CH2AsS)3 (4) can be de-sulphurated with triphenylphosphine to yield also 2. The reaction of 1 with NaSeH gives the new cage compound 6-methyl-l,3,4-triarsa-2,8-diselena-tricyclo[3,3,l,0 3 > 4 ]-nonane, CH3C(CH2As)3Se2 (5). 
  Reference    Z. Naturforsch. 35b, 1514—1517 (1980); eingegangen am 5. August 1980 
  Published    1980 
  Keywords    Hetero Cage Compounds, Synthesis, Vibrational Spectra, Mass Spectra, 1 H NMR Spectra 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-1514.pdf 
 Identifier    ZNB-1980-35b-1514 
 Volume    35 
74Author    Hartmut Hlawatschek, Gertrud Kiel, Gerhard GattowRequires cookie*
 Title    Kristallstruktur und spektroskopische Untersuchungen von Dithiomalonsäurediamid H2C(CS-NH2)2: Ein Beispiel für eine Helixstruktur Crystal Structure and Spectroscopic Investigations of H2C(CS-NH2)2: An Example for an Helix Structure  
 Abstract    The crystal structure of dithiomalonediamide (H2C(CS-NH2)2) has been determined. The compound crystallizes in the orthorhombic space group P2nn, No. 34, with a — 4.354(3), b = 7.940(5) and c = 8.458(5) A. The molecules are connected by S • • • H bridges to form helices along the crystallographic a axes. 
  Reference    Z. Naturforsch. 36b, 1386—1391 (1981); eingegangen am 7. Mai 1981 
  Published    1981 
  Keywords    Crystal Structure, Vibrational Spectra, 13 C NMR Spectra, !H NMR Spectra, Dithiomalonediamide 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-1386.pdf 
 Identifier    ZNB-1981-36b-1386 
 Volume    36 
75Author    Jochen Ellermann, Martin LietzRequires cookie*
 Title    Chemie polyfunktioneller Liganden, 69 [1] Über drei Organo-Arsen-Käfigverbindungen mit Noradamantanstruktur Chemistry of Polyfunctional Ligands, 69 [1] Three Organo-Arsenic Cage Compounds with Noradamantane Structure  
 Abstract    The reaction of l.l.l-tris(diiodarsinomethyl)ethane, CH3C(CH2Asl2)3 (1), with H 2 C(COOC 2 H 5)2, H 2 C(COOCH 3)2 and H 2 C(COC 6 H 5)2 in presence of the auxiliary base (C 2 Hs)3N gives the noradamantane structured compounds CH3C(CH2As)3E2 [E = C(COOC 2 H 5)2 (2), C(COOCH 3) 2 (3) and C(COC 6 H 5) 2 (4)]. The new compounds have been characterized by mass spectrometry and infrared, Raman and X H NMR spectroscopy. 
  Reference    Z. Naturforsch. 36b, 1532—1537 (1981); eingegangen am 5. August 1981 
  Published    1981 
  Keywords    Arsenic Cage Compounds, Synthesis, Vibrational Spectra, Mass Spectra, X H NMR Spectra 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-1532.pdf 
 Identifier    ZNB-1981-36b-1532 
 Volume    36 
76Author    Eberhard Bessler, Johann WeidleinRequires cookie*
 Title    Borkomplexe mit Dicarbonsäuren: Bis(oxalato)borate und Bis(malonato)borate Boron Complexes with Dicarboxylic Acids: Bis(oxalato)borates and Bis(malonato)borates  
 Abstract    Several bis(oxalato)borates and bis(malonato)borates have been prepared in hetero-geneous reaction from boric acid, dicarboxylic acid and dicarboxylic salt by refluxing in benzene under continuous separation of water. The compounds were characterized by their IR and n B NMR spectra. The vibrational spectra of the bis(oxalato)borate are discussed in detail. 
  Reference    Z. Naturforsch. 37b, 1020—1025 (1982); eingegangen am 18. Februar 1982 
  Published    1982 
  Keywords    Boron Compounds, Dicarboxylic Acids, Bis(oxalato)borates, Bis(malonato)borates, Vibrational Spectra 
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 TEI-XML for    default:Reihe_B/37/ZNB-1982-37b-1020.pdf 
 Identifier    ZNB-1982-37b-1020 
 Volume    37 
77Author    M. Ohsen, Safarpour Haghighi, Heiner HomborgRequires cookie*
 Title    Darstellung und Eigenschaften von Bis(phthalocyaninato)lanthanaten und -ceraten Preparation and Properties o f Bis(phthalocyaninato)lanthanates and -cerates  
 Abstract    High yields of bisphthalocyaninates of lanthanum and cerium have been obtained in the strongly exothermic reaction of the dehydrated lanthanoid acetates with molten 1,2-di-cyanobenzene in the presence of potassium hydroxide or methylate. Salts of the type (cat)[M(Pc(2-))-,] (M = La, Ce) with different cations (cat+ = K. Bu4N, PNP. TDOA) have been isolated. The corresponding "Hydrogen salts" are obtained by thermal decomposition of (Bu4N)[M(Pc(2-))-,] at T > 350 C. The dimeric structure is confirmed by negative fast atom bombardement mass spectra. The redox properties have been investigated by cyclovoltam-metry and UV, VIS, MIR, FIR and resonance Raman (RR) spectra are reported. Electronic transitions between 2000 and 3000 cm 1 are observed in the low temperature RR spectra of (Bu4N)[Ce(Pc(2-))^] being RR enhanced at 470 nm. From the assignment to the higher transi­ tions within the symmetry split 5F5/2, :F7 manifolds of the f1 ground state of Ce3+ the crystal field parameters f4f = 610.5, B40 = 242.2 and B60 = 4.1 cm-1 have been determined. 
  Reference    Z. Naturforsch. 46b, 1641—1649 (1991); eingegangen am 18. Juni 1991 
  Published    1991 
  Keywords    Bis(phthalocyaninato)lanthanates Bis(phthalocyaninato)cerates, Vibrational Spectra, UV-VIS Spectra, Electronic Raman Spectra 
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 TEI-XML for    default:Reihe_B/46/ZNB-1991-46b-1641.pdf 
 Identifier    ZNB-1991-46b-1641 
 Volume    46 
78Author    G. Ottfried Pawelke, Ralph Dammei, Wolfgang PollRequires cookie*
 Title    Darstellung von Difluormethanimin F2C = N H und F2C = N D durch Hydrolyse von CF3NCO Preparation of Difluoromethanimine F 2C = NH and F 2C = ND by Hydrolyses of C F 3NCO  
 Abstract    The title com pounds have been prepared by controlled hydrolysis o f C F 3NCO in N E t3. Their 13C, 19F and 'H N M R spectra are reported and their IR gas and IR matrix spectra are discussed in terms o f a normal coordinate analysis. The photoelectron spectrum o f F2C = NH is compared with those o f F2C = N F and H 2C = N H revealing a strong fluoro effect. In the solid state F2C = N H is aggregated to infinite zig-zag chains by N • • • H hydrogen bonding. 
  Reference    Z. Naturforsch. 47b, 351 (1992); eingegangen am 17. September 1991 
  Published    1992 
  Keywords    D ifluoromethanimine, N M R Spectra, Vibrational Spectra, Photoelectron Spectra, X-Ray 
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 TEI-XML for    default:Reihe_B/47/ZNB-1992-47b-0351.pdf 
 Identifier    ZNB-1992-47b-0351 
 Volume    47 
79Author    W. Preetz, M. M. AntheyRequires cookie*
 Title    Schwingungsspektren und Normalkoordinatenanalyse der Bromo-Iodo  
 Abstract    Osmate(IV), [O sB r ^ J 2-, n = 0 -6 V ibrational S pectra and N o rm al C oordinate A nalysis o f B rom o-Iodo-O sm ates(IV), [OsBr"I6_"]2-, n = 0 -6 The IR and Raman spectra o f the ten brom o-iodo-osm ates(IV) [OsBr"I6_n]2-, n = 0 -6 , in­ cluding the geometrical isomers for n = 2, 3, 4, have been recorded at low temperature. The vibrational spectra are completely assigned according to point groups Oh, D 4h, C4v, C3v, and C2v, as supported by normal coordinate analyses based on a general valence force field. D ue to the different mzns-influences B r < I in asymmetric axes B r '-O s -I ', the O s -I ' bonds are strengthened and the O s-B r' bonds are weakened, as indicated by valence force constants, for O s -I ' on average 4% higher and for O s-B r' 4% lower, as compared with the values calculat­ ed for symmetric I -O s -I and B r -O s —Br axes, respectively. 
  Reference    Z. Naturforsch. 47b, 1667—1672 (1992); eingegangen am 10. August 1992 
  Published    1992 
  Keywords    Brom o-Iodo-Osm ates(IV), Stereoisomers, mms-Influence, Vibrational Spectra, Norm al Coordinate Analysis 
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 Identifier    ZNB-1992-47b-1667 
 Volume    47 
80Author    ". B. Preparation, 13cN., M. R., Vibrational Spectra, W. Preetz, A. Franken, M. R. AthRequires cookie*
 Title    Darstellung, UB-, 13C-NM R-und Schwingungsspektren der c/öso-Hexaborate [B6H 5(C N )|2~ und m -[B 6H4(CN)2l2_ sowie Kristallstruktur von Cs2[B6H 5(CN)|  
 Abstract    of the c/oso-Hexaborates [B6H 5(CN)]2~ and c/s-[B6H 4(C N)2]2-, and the Crystal Structure o f Cs2[B6H 5(CN)] By reaction o f Cs2[B6H 6] with in situ generated dicyanogen in aqueous alkaline solution the m onocyanohydrohexaborate C s2[B6H5(CN)] and the dicyanohydrohexaborate cis-Cs,[B6H4(C N)2] are formed. The com pounds have been separated by ion exchange chrom atog­ raphy on diethylaminoethyl cellulose. The crystal structure o f Cs2[B6H5(CN)] was determined from single crystal X-ray diffraction analysis; monoclinic, space group P 2 Ja with a = 9.540(8), b = 9.977(3), c = 10.578(2) Ä, ß = 105.06(2)°. The B6 octahedron is compressed in the direction o f the nearly linear B -C N bond by about 5%, with bond lengths between 1.71 and 1.76Ä . The "B N M R spectra o f the two com pounds reveal the features o f substituted B6 cages with C4v and C2v point symmetry. In the l3C N M R spectrum o f Cs2[B6H 5(CN)] a quartet at -139 ppm with '/(C ,B) 92 Hz is observed. The IR and Raman spectra exhibit very strong CN stretching bands for Cs2[B6H5(CN)] at 2149, and for m -C s2[B6H4(C N)2] at 2170 c tr r 1. 
  Reference    Z. Naturforsch. 48b, 598—6 (1993); eingegangen am 7. Dezember 1992 
  Published    1993 
  Keywords    M onocyanohydrohexaborate, m -Dicyanohydrohexaborate, Crystal Structure, 11B N M R Spectra, Vibrational Spectra 
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 Identifier    ZNB-1993-48b-0598 
 Volume    48 
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