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21Author    CyR. Il, P., G. In, J. L.Requires cookie*
 Title    Charge-Transfer Spectra of Some Heterocyclic Cations  
 Abstract    Energies of the first charge-transfer bands of complexes of heterocyclic pyridi-nium-like cations with various electron donors (the iodide ion, benzenoid h ydro­ carbons) yield linear correlations with the HMO energies of the lowest unoccupied rr-molecular orbitals (LUMO) o f the hetero­ cyclic acceptors. The experimental charge-transfer band maxima were taken from the literature. Charge-transfer band maxima for the complexes of the 2,4,6-trim ethylpyrylium cation with several electrons donors (diethyl-amine, N,N-dimethylaniline, pyridine N-oxide, anthracene) have been determined and compared with the analogous data for the tropylium cation. 
  Reference    (Z. Naturforsch. 30b, 984—986 [1975]; received June 23 1975) 
  Published    1975 
  Keywords    N-Methylpyridinium-like Cations, Tropylium Cation, 2, 4, 6-Trim ethylpyrylium Cation, HMO Calculations, Linear Correlations 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0984_n.pdf 
 Identifier    ZNB-1975-30b-0984_n 
 Volume    30 
22Author    Marianne Baudler, Elmar TollsRequires cookie*
 Title    Beiträge zur Chemie des Phosphors, 84 [1] 1.2.3-Trimethyl  
 Abstract    The reaction of K2(PMe)4 • 2 THF with eis-1,2-dichloroethylene yields the hitherto unknown cyclocarbaphosphanes 1,2,3-trimethyl-1,2,3-triphosphole, (PMe)3C2H2 (1), and 2,3,4,6,7,8-hexamethyl-2,3,4,6,7,8-hexaphosphabicyclo[3,3,0]octane, (PMe)6C2H2 (2). Besides, (PMe)s, (PMe)4CH2, (PMe)3C2Hi, and the new six-membered heterocycle (PMe)2(C2H2)2 are formed. The cyclocarbaphosphanes 1 and 2 were characterized by elemental analysis, mass, IR, Raman, and NMR spectra. For the bicyclic compound 2 two diastereomers were obtained and separated. They differ in the position of the methine hydrogens and of the methyl substituents (eis-2 and trans-2). Compound 2 is also produced in the reaction of K2(PMe)4 • 2 THF with £rans-l,2-dichloroethylene whereas with 1,1,2,2- tetrachloroethane mainly (PMe)s is formed. In 1 and in each of thefive-memberedrings of cis-2 and trans-2 the methyl substituents at adjacent phosphorus atoms are situated on opposite sides of the ring. 
  Reference    Z. Naturforsch. 33b, 691—697 (1978); eingegangen am 24. April 1978 
  Published    1978 
  Keywords    3-Trimethyl-1, 2, 3-triphosphole, (PMe)3C2H2, and 2, 3, 4, 6, 7, 8-Hexamethyl-2, 3, 4, 6, 7, 8-hexaphosphabicyclo[3, 3, 0]oetane, (PMe)6C2H2 l, 2, 3-Trimethyl-l, 2, 3-triphosphole, l, 2, 3-Trimethyl-cyclo-4, 5-dicarba-4-en-l, 2, 3-triphosphane, Hexaphosphabicyclo[3, 3, 0]octanes (eis and trans), Cyclocarbaphosphanes, Heterocyclophosphanes 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0691.pdf 
 Identifier    ZNB-1978-33b-0691 
 Volume    33 
23Author    Christian Reichardt, Wolfgang ScheibeleinRequires cookie*
 Title    Synthesen mit aliphatischen Dialdehyden, XXVII [1] Eine "non-template"-Synthese zur Darstellung metallfreier 1.4.8.11-Tetraaza [14] annulen-Derivate Syntheses with Aliphatic Dialdehydes, XXVII [1] A Non-Template Synthesis for the Preparation of Metal-Free 1,4,8,11-Tetraaza[14]annulene Derivatives  
  Reference    Z. Naturforsch. 33b, 1012—1015 (1978); eingegangen am 2. Mai 1978 
  Published    1978 
  Keywords    6, 3-Disubstituted l, 4, 8, ll-Tetraaza[14]annulenes, Non-Template Synthesis 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-1012.pdf 
 Identifier    ZNB-1978-33b-1012 
 Volume    33 
24Author    JaapG. Haasnoot, WillemL. GroeneveldRequires cookie*
 Title    Complexes of 1,2,4-Triazoles, VII [1] Preparation and Vibrational Spectra of 4,4'-Bi-l,2,4-triazole and Some of its Complexes with Transition Metal(II) Thiocyanates  
 Abstract    The preparation and characterization of 4,4'-bi-l,2,4-triazole is described. The com-pound is a strong, polydentate, polynucleating nitrogen donor. Two complexes, M(btr)2(NCS)2H20 M = Co, Ni, are described. The vibrational spectra of ligand and complexes are compared. A structure for the complexes is proposed. 
  Reference    Z. Naturforsch. 34b, 1500—1506 (1979); received July 2 1979 
  Published    1979 
  Keywords    4, 4'-Bi-l, 2, 4-triazole, IR, Ligand Field, Polynuclear Complexes 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-1500.pdf 
 Identifier    ZNB-1979-34b-1500 
 Volume    34 
25Author    Bernd WrackmeyerRequires cookie*
 Title    U B-und 18 C-NMR-Spektroskopie von riic7o-Hexaalkyl-2.3.4.5-tetracarbahexaboranen(6) n B and 13 C NMR Spectroscopy of 7iüZo-Hexaalkyl-2,3,4,5-tetracarbahexaboranes(6)  
  Reference    Z. Naturforsch. 37b, 412—419 (1982); eingegangen am 26. Oktober 1981 
  Published    1982 
  Keywords    U B NMR Spectra, 13 C NMR Spectra, nido -Hexaalky 1 -2, 3, 4, 5-tetracarbahexaboranes( 6) 
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 TEI-XML for    default:Reihe_B/37/ZNB-1982-37b-0412.pdf 
 Identifier    ZNB-1982-37b-0412 
 Volume    37 
26Author    Omer Say, Peter DeckerRequires cookie*
 Title    An Energy Rich Phosphate from 2 -Methylimidazole through Nonenzymatic Photophosphorylation * 4 * *  
  Reference    Z. Naturforsch. 38b, 1098—1100 (1983); received March 28 1983 
  Published    1983 
  Keywords    Bioids, Photophosphorylation, Imidazole Oxidation, Nonenzymatic Phosphate Activation, 4, 5-Dihydroxy-2-methylimidazoline-0-mono phosphate 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-1098.pdf 
 Identifier    ZNB-1983-38b-1098 
 Volume    38 
27Author    Peter Hofmann, Alexander Sieber, Erich Beck, Ulrich SchubertRequires cookie*
 Title    Die Struktur vermeintlicher Di-und Triketone des 2.2.6.6-Tetramethylpiperidins: Mono-und Diketone des Pyrrolin-1 The Structure of Supposed Di-and Triketones of 2,2,6,6-Tetramethylpiperidine: Mono-and Diketones of Pyrroline-1  
  Reference    Z. Naturforsch. 38b, 1192—1198 (1983); eingegangen am 15. Juni 1983 
  Published    1983 
  Keywords    Triketopiperidines, 4, 5-Dihydropyrrol-3, 4-diones, UY-Photoelectron Spectra, MO Calculations, X-Ray Structure 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-1192.pdf 
 Identifier    ZNB-1983-38b-1192 
 Volume    38 
28Author    Thomas Kuhlmann, W. Alter, SiebertRequires cookie*
 Title    Bis  
 Abstract    [(i/3-allyl)nickel(|i,i/5-2,3-dihydro-l,3-diborolyl)]nickeI-Tetradecker-Komplexe mit terminalen Allylliganden [1] Bis[(/;?-allyl)nickel(i/,/;:'-2,3-dihydro-l,3-diborolyl)]nickel T etradecker Complexes with Term inal Allyl Ligands [1] 
  Reference    Z. Naturforsch. 39b, 1046—1049 (1984); eingegangen am 10. März 1984 
  Published    1984 
  Keywords    l, 23, 4, 5-Pentaalkyl-2, 3-dihydro-I, 3-diboroles, Bis(allyl)nickel Tetradecker Complexes 
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 TEI-XML for    default:Reihe_B/39/ZNB-1984-39b-1046.pdf 
 Identifier    ZNB-1984-39b-1046 
 Volume    39 
29Author    Frank Edelmann, Claudia Spang, HerbertW. Roesky, PeterG. JonesRequires cookie*
 Title    Synthese und Struktur des ersten dreigliedrigen Arsen—Phosphor—Platin-Ringes Synthesis and Structure of the First Three-Membered Ring Containing Arsenic, Phosphorus and Platinum  
 Abstract    -butylphenylphosphane reacts with CpFe(C,H4AsCl2) in the presence of DBU to yield CpFe[C5H4As=PC6H2(f-Bu)?l. The reaction of this arsaphosphene with (Ph3P)2PtC2H4 yields CpFe[C5H4As—P[C6H2(r-Bu)3]Pt(PPh3)2], a compound with a three-membered ring containing arsenic, phosphorus and platinum. 
  Reference    Z. Naturforsch. 43b, 517—520 (1988); eingegangen am 5. Januar 1988 
  Published    1988 
  Keywords    X-Ray, NMR Spectra, Phosphorus, Arsenic, Platinum 2, 4, 6-Tri 
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 TEI-XML for    default:Reihe_B/43/ZNB-1988-43b-0517.pdf 
 Identifier    ZNB-1988-43b-0517 
 Volume    43 
30Author    Kimiaki Yamano, Haruhisa ShirahamaRequires cookie*
 Title    Clitocybe acromelalga  
 Abstract    A new piperidine amino acid, 2,4,5-piperidinetricarboxylic acid (11) was isolated from the poisonous mushroom, Clitocybe acromelalga. The structure determination and its biogenetic potential are discussed. 
  Reference    Z. Naturforsch. 49c, 707 (1994); received July 7/August 15 1994 
  Published    1994 
  Keywords    Clitocybe acromelalga, Toadstool, Piperidine Amino Acid, 2, 4, 5-Piperidinetricarboxylic Acid, Biogenesis 
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 TEI-XML for    default:Reihe_C/49/ZNC-1994-49c-0707.pdf 
 Identifier    ZNC-1994-49c-0707 
 Volume    49 
31Author    Herbert Meier, Ahmed Issa, Ursula MerkleRequires cookie*
 Title    5aH  
 Abstract    A supposed benzoxete is determined as a complex polycyclic system: cis,cis,cis-5 aH,10 aH,15 aH-tribenzo[b,f,j][l,4,7]trioxa[9 b]azaplienalene. The structure elucida-tion is performed by spectroscopycal methods (IR, *H NMR, 13 C NMR and mass spec-troscopy) and by degradation reactions in an acidic or an alkaline medium. 
  Reference    Z. Naturforsch. 34b, 290—296 (1979); eingegangen am 28. September 1978 
  Published    1979 
  Keywords    lOaH, 15aH-Tribenzo[b, f, j][l, 4, 7]trioxa[9b]azaphenalenes -Supposed Benzoxetes 3-Hydroxyaldehydes, Benzoxetes, Benzoxazines 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0290.pdf 
 Identifier    ZNB-1979-34b-0290 
 Volume    34 
32Author    FaridS G Soliman, Wolfgang Stadlbauer, Thomas KappeRequires cookie*
 Title      
  Reference    Z. Naturforsch. 36b, 252—256 (1981); eingegangen am 1. Oktober 1980 
  Published    1981 
  Keywords    Bis-2, 4, 6-trichlorophenyl Malonates, 2-Methyl-4-quinazolinones, lH-Pyrido[l, 2-a]quinazoline-l, 6-diones 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-0252.pdf 
 Identifier    ZNB-1981-36b-0252 
 Volume    36 
33Author    Klaus Burger, Herbert Goth, Kurt Einhellig, Alfred GierenRequires cookie*
 Title    Zum Thermolyseverhalten von 2.2-Dihydro-1.4.2-oxazaphosphol-4-enen, I Über die Dimerisierung von bis(trifluormethyl)substituierten Nitril-yliden [1, 2] Thermolysis of 2,2-Dihydro-l,4,2-oxazaphosphol-4-enes, I Dimerization of Bis(trifluoromethyl) Substituted Nitrile Ylides [1, 2]  
  Reference    Z. Naturforsch. 36b, 345—352 (1981); eingegangen am 18. November 1980 
  Published    1981 
  Keywords    I, 4, 2-Oxazaphosphoranes, 5->-[3 + 2]Cycloreversion Reactions, 1, 3-Dipole Dimerization, Head to Head Dimerization 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-0345.pdf 
 Identifier    ZNB-1981-36b-0345 
 Volume    36 
34Author    CarlH. Abben, A. Nton Meller, M. Atthias, N. Oltem Eyer, GeorgeM. SheldrickRequires cookie*
 Title    Synthese, Molekül-und Kristallstruktur von 3,5-Dimethyl-2,6-bistrimethylsilyl- l-thia-2,4,6-triaza-3,5-diborinan-wolframpentacarbonyl Synthesis, M olecular and Crystal Structure of 3,5-Dimethyl-2,6-bistrimethylsilyl- l-thia-2,4,6-triaza-3,5-diborinane-tungstenpentacarbonyl  
 Abstract    The am m onolysis o f 3,5-dim ethyl-2,6-bistrim ethylsilyl-l,4-dithia-2,6-diaza-3,5-diborinane leads to 3,5-dim ethyl-2,6-bistrim ethylsilyl-l-thia-2,4,6-triaza-3,5-diborinane, which reacts with tungstenpentacarbonyl • TH F to give the title-com pound. 'H , " B , 13C, 14N , 29Si N M R spectra, IR and MS data, and the results o f an X-ray analysis are reported. 
  Reference    Z. Naturforsch. 41b, 799—802 (1986); eingegangen am 19. Februar 1986 
  Published    1986 
  Keywords    l-Thia-2, 4, 6-triaza-3, 5-diborinanes, Tungstenhexacarbonyl, Synthesis, M olecular Structure, Crystal Structure 
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 TEI-XML for    default:Reihe_B/41/ZNB-1986-41b-0799.pdf 
 Identifier    ZNB-1986-41b-0799 
 Volume    41 
35Author    Axel Fischer, Ion Neda, Thomas Kaukorat, Ralf Sonnenburg, PeterG. Jones, R.Einhard SchmutzlerRequires cookie*
 Title    Chemistry of the 4,5-Benzo-3-methyl-l,3,2-oxazaphosphorinan-6-one Ring System: X-Ray Crystal Structure Analysis of a Bis(2-chloroethyl)amino-and of an Acetam ido-Substituted Derivative  
  Reference    Z. Naturforsch. 49b, 939—949 (1994); eingegangen am 14. Februar 1994 
  Published    1994 
  Keywords    4, 5-Benzo-3-m ethyl-l, 3, 2-oxazaphosphorinan-6-one Derivatives, H alogen Substitution, Oxidation, X-Ray 
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 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-0939.pdf 
 Identifier    ZNB-1994-49b-0939 
 Volume    49 
36Author    Z. NaturforschRequires cookie*
 Title    Elektronentransfer und Ionenpaar-Bildung  
 Abstract    , 47 [1] Titrationen von 1,2,4,5-Tetracyanbenzol und 7,7,8,8-Tetracyan-/;-chino-dimethan mit Natriummetall in aprotischen Lösungen E le ctro n T ran sfer an d Ion P air F o rm atio n , 47 [ 1 ] T itratio n s o f 1,2 ,4 ,5 -T etracy an o b en zen e and 7 ,7 ,8 ,8 -T etracy an o -/?-q u in o d im eth an e w ith S o d iu m M etal in A p ro tic S o lu tio n s H an s B ock*, M a rk u s K leine 
  Reference    Z. Naturforsch. 51b, 1215—1221 (1996); eingegangen am 25. Januar 1996 
  Published    1996 
  Keywords    1, 2, 4, 5-Tetracyanobenzene, 7, 7, 8, 8-Tetracyano-/?-quinodimethane, Sodium Metal Reduction, UV/VIS Spectra 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-1215.pdf 
 Identifier    ZNB-1996-51b-1215 
 Volume    51 
37Author    Z. NaturforschRequires cookie*
 Title    Ein weiteres 2A5,4A5-Diphosphapyridin: 2,2,4,4-Tetrakis-(dimethylamino)-6- amino-l-aza-2A5,4A5-diphosphinin  
 Abstract    A Further 2A5,4A5-Diphosphapyridine: 2,2,4,4-Tetrakis-(dimethylamino)-6-amino-1-aza-2A5,4A5-diphosphinine.-(dimethylamino)-6-amino-l-aza-2A5,4A5-diphosphinine (3) has been pre­ pared by reacting l,l,3,3-tetrakis(dim ethylam ino)-lA 5-3A:'-diphosphete (1) with bis(trimethyl-silyl)carbodiimide (2) in a 2 : 1 molar ratio. Properties, 'H, P, and l3C NMR, mass, and IR spectra are reported and discussed. Com pound 3 is further characterized by X-ray structure analysis. 
  Reference    Z. Naturforsch. 53b, 443—147 (1998); eingegangen am 12. Dezember 1997 
  Published    1998 
  Keywords    A5-Diphosphete, l-Aza-2A5, 4A5-diphosphinine, NMR Spectra, X-Ray Data 2, 2, 4, 4-Tetrakis 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-0443.pdf 
 Identifier    ZNB-1998-53b-0443 
 Volume    53 
38Author    Armin Traub, Hans GeigerRequires cookie*
 Title    Nachweis  
 Abstract    von 2.5.7.3/.4,-Pentahydroxy-flavanon-5-glucosid in den Samen von G a le g a o f f ic in a lis L. (Fabaceae) Detection of 2,5,7,3/,4/-Pentahydroxy-flavanone-5-glucoside in the Seeds of Galega officinalis L. (Fabaceae) 
  Reference    (Z. Naturforsch. 30c, 823 [1975]; eingegangen am 14. Juli 1975) 
  Published    1975 
  Keywords    Galega officinalis L, Fabaceae, 2, 5, 7, 3', 4'-Pentahydroxy flavanon, 2, 4, 6, 3', 4'-Pentahydroxydibenzoylmethane, Flavonoids, Glycosides 
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 TEI-XML for    default:Reihe_C/30/ZNC-1975-30c-0823_n.pdf 
 Identifier    ZNC-1975-30c-0823_n 
 Volume    30 
39Author    Hans Rausch, GeorgG. GrossRequires cookie*
 Title    Preparation of [14C]-LabeIled l,2,3,4,6-Penta-0-Gal!oyl-/?-D-Glucose and Related Gallotannins  
 Abstract    [U -14C]-Labelled 1,2,3,4,6-penta-O-galloyl-ß-D-glucose was prepared by photoassimilation of 14C 0 2 with leaves from staghorn sumac (Rhus typhina) in the presence of the herbicide glyphosate. Extracts of the plant material were partitioned against ethyl acetate and chro­ matographed on Sephadex LH-20, yielding a series o f crude tri-to decagalloylglucoses. The pentagalloylglucose fraction among these was further purified by HPLC to >99% purity and a specific radioactivity of 130 kBq (3.5 fiCi) per fimol. The ratio of the radioactivities in the glucose and galloyl moieties, respectively, suggested a uniform labelling pattern of the product. 
  Reference    Z. Naturforsch. 51c, 473 (1996); received February 8/March 8 1996 
  Published    1996 
  Keywords    [I4C]l, 2, 3, 4, 6-Penta-0-galloyl-ß-D-glucopyranose, Gallotannins, Photosynthesis, Rhus typhina, Staghorn Sumac 
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 TEI-XML for    default:Reihe_C/51/ZNC-1996-51c-0473.pdf 
 Identifier    ZNC-1996-51c-0473 
 Volume    51 
40Author    Klaus Burger, Herbert GothRequires cookie*
 Title    Positionsselektivität und Regiochemie bei Abfangreaktionen mit Heterokumulenen Cycloaddition Behaviour of Bis(trifluoromethyl) Substituted Nitrile Ylides [1] Site Selectivity and Regiochemistry of Trapping Reactions with Heterocumulenes  
 Abstract    3,3-bis(trifluoromethyl)-2,2-dihydro-l,4,2-oxazaphosphol-4-enes on thermolysis undergo a 1,3-dipolar cycloreversion reaction with formation of bis(trifluoro-methyl) substituted nitrile ylides and trimethyl phosphate. The nitrile ylides are trapped by N-8ulfinyl aniline, phenyl isocyanate, phenyl isothiocyanate, diphenyl ketene, and carbon disulfide. Site selectivity and regiochemistry of the [3 + 2]cycloaddition reactions are described. The results are compared with those obtained from [3 + 2]cycloaddition reactions of nitrile imines, nitrile oxides, alkyl, and aryl substituted nitrile ylides with heterocumulenes. 
  Reference    Z. Naturforsch. 37b, 473—485 (1982); eingegangen am 30. September 1981 
  Published    1982 
  Keywords    1, 3-Dipolar Cycloreversion Reactions, 2, 2-Dihydro-l, 4, 2-oxazaphosphol-4-enes, Trifluoromethyl Substituted 1, 3-Dipoles, Partially Fluorinated Heterocyclic Compounds 2, 2, 2-Trimethoxy- 
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 TEI-XML for    default:Reihe_B/37/ZNB-1982-37b-0473.pdf 
 Identifier    ZNB-1982-37b-0473 
 Volume    37 
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