Go toArchive
Browse byFacets
Bookbag ( 0 )
'4' in keywords Facet   section ZfN Section B  [X]
Results  35 Items
Sorted by   
Publication Year
1998 (1)
1996 (1)
1995 (1)
1994 (2)
1992 (1)
1988 (4)
1987 (2)
1986 (2)
1985 (3)
1984 (1)
1Author    Requires cookie*
 Title    Darstellung und Kristallstruktur von 2  
  Reference    (Z. Naturforsch. 47b, 1 [1992]) 
  Published    1992 
  Keywords    4, 6-Triferrocenyl-1, 3, 5, 2, 4, 6-triselenatriborinan 
  Similar Items    Find
 TEI-XML for    default:Reihe_B/47/ZNB-1992-47b-0001.pdf 
 Identifier    ZNB-1992-47b-0001 
 Volume    47 
2Author    Winfried Hinrichs, Jürgen Kopf, Klaus-Wilhelm Stender, Günter KlarRequires cookie*
 Title    Selbststapelnde Systeme, I 4 a Compound with Radical Cations and Polyiodide Chains  
 Abstract    ,4' ,5,5'-Tetramethoxy-2,2'-dithiobiphenyl-Iod (6/7), eine Verbindung mit Radikalkationen und Polyiodidketten Selfstacking Systems, I 4,4',5,5'-Tetramethoxy-2,2'-dithiobiphenyl-Iodine (6/7), 
  Reference    (Z. Naturforsch. 40b, 39—44 [1985]; eingegangen am 20. September 1984) 
  Published    1985 
  Keywords    4, 4', 5, 5'-Tetramethoxy-2, 2'-dithiobiphenyl-Iodine (6/7), Molecular and Crystal Structure, Self-stacking Systems, Polyiodide Chains 
  Similar Items    Find
 TEI-XML for    default:Reihe_B/40/ZNB-1985-40b-0039.pdf 
 Identifier    ZNB-1985-40b-0039 
 Volume    40 
3Author    Klaus-Wilhelm Stender, Günter Klar, Dierk KnittelRequires cookie*
 Title    Elektrochemisches Verhalten von Dibenzodichalkogeninen und verwandten Verbindungen Electrochemical Behavior of Dibenzodichalcogenins and Related Compounds  
  Reference    Z. Naturforsch. 40b, 774—781 (1985); eingegangen am 8. März 1985 
  Published    1985 
  Keywords    Thianthrenes, Selenanthrenes, 2, 2'-Dithiobiphenyls, Cyclic Voltammetry, 4, 4', 5, 5'-Tetramethoxy-2, 2'-dithiobiphenyl 
  Similar Items    Find
 TEI-XML for    default:Reihe_B/40/ZNB-1985-40b-0774.pdf 
 Identifier    ZNB-1985-40b-0774 
 Volume    40 
4Author    Tetratertiary Phosphine, R.B K, P.R H, J.C CRequires cookie*
 Title    Isomerism in the Linear  
 Abstract    Isom erism , P hosphines, Linear tetratertiary phosphine, 1,1,4,7,10,10 -H exap h en y 1 -1,4,7,10 -tetraphosphadecane 
  Reference    (Z. Naturforsch. 29b, 574—575 [1974]; received M arch 4 1974) 
  Published    1974 
  Keywords    4, 7, 1 0, 10-Hexaphenyl-l, 4, 7, 10-Tetraphos-phadecane 
  Similar Items    Find
 TEI-XML for    default:Reihe_B/29/ZNB-1974-29b-0574_n.pdf 
 Identifier    ZNB-1974-29b-0574_n 
 Volume    29 
5Author    Giorgio Malesani, Ugo Quintily, Gianfranco ChiarelottoRequires cookie*
 Title    345 G. Malesani et al. * Keto-enol Tautomerism in 4,7-Dioxo-4,5,6,7-tetrahydroindoles  
 Abstract    The tautomeric equilibria of 4,7-dioxo-4,5,6,7-tetrahydroindoles have been investigated by nuclear magnetic resonance spectroscopy. Proton chemical shift measurements have been made for a series of alkyl or arylindole derivatives, and equilibrium constants ([enol]/[keto]) have been determined. The effect of solvent on the enol-keto equilibria has been studied. 
  Reference    Z. Naturforsch. 34b, 333—338 (1979); received September 8 1978 
  Published    1979 
  Keywords    Keto-enol Tautomerism, 4, 7-Dioxo-4, 5, 6, 7-tetrahydroindoles, 4, 7-Dihydroxyindole Derivatives 
  Similar Items    Find
 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0333.pdf 
 Identifier    ZNB-1979-34b-0333 
 Volume    34 
6Author    Requires cookie*
 Title    Einkernige Ruthenium(III)-Komplexe des Typs LRuX3 (X = Cl  
  Reference    Z. Naturforsch. 49b, 330 (1994) 
  Published    1994 
  Keywords    NCO-, NCS", Nj; L = l, 4, 7-Trimethyl-l, 4, 7-triazacyclononan) 
  Similar Items    Find
 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-0330.pdf 
 Identifier    ZNB-1994-49b-0330 
 Volume    49 
7Author    NarendraS. SridharaRequires cookie*
 Title    Thermal Decomposition of P,P-diphenyl-N-benzyl-phosphinothioic Amide and P,P-diphenyl-N-methyl-phosphinothioic Amide  
  Reference    Z. Naturforsch. 33b, 212—213 (1978); received July 1 1977 
  Published    1978 
  Keywords    2, 2, 4, 4, 6, 6-Hexaphenylcyclophosphazatriene, Diphenylphosphinothioic Amide, 113355-Hexaphenyl-1 -methylaminotriphosphazene-5-sulphide, P, P-Diphenyl-N-dimethylphosphinothioic Amide 
  Similar Items    Find
 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0212.pdf 
 Identifier    ZNB-1978-33b-0212 
 Volume    33 
8Author    Herbert Fisch, Hans Pritzkow, Walter SiebertRequires cookie*
 Title    Enthalogenierung von Bis(diisopropylamino-chlorboryl)methan: Lösungsmittelabhängige Bildung eines 1,2,4,5-Tetraborinan-und eines l-Aza-2,4-diborolidin-Derivats Dehalogenation of Bis(diisopropylamino-chloroboryl)methane: Solvent-dependent Formation of a 1,2,4,5-Tetraborinane and of a l-Aza-2,4-diborolidine Derivative  
  Reference    Z. Naturforsch. 43b, 658—664 (1988); eingegangen am 7. Dezember 1987 
  Published    1988 
  Keywords    l, 2, 4, 5-Tetrakis(diisopropylamino-chloroboryl)-l, 2, 4, 5-tetraborinane, l-Aza-2, 4-diborolidine Derivatives 
  Similar Items    Find
 TEI-XML for    default:Reihe_B/43/ZNB-1988-43b-0658.pdf 
 Identifier    ZNB-1988-43b-0658 
 Volume    43 
9Author    Requires cookie*
 Title    4,7-Dimethoxyindole Derivatives Bearing Alkyl Groups in the Pyrrole Fused Ring: Structure of the Demethylated Compounds Preparation  
 Abstract    G io r g io M a l e s a n i * a n d G io r g io R i g a t t i The alkylation of 4,7-dimethoxyindole and the demethylation of the obtained compounds with anhydrous aluminium chloride in benzene is described. The demethylated derivatives have the structure of 4,7-dioxo-4,5,6,7-tetrahydroindoles. 
  Reference    (Z. Naturforsch. 30b, 954—958 [1975]; received January 31/April l/May 22 1975) 
  Published    1975 
  Keywords    Demethylation, Dialkyl Derivatives, 4, 7-Dimethoxyindole 
  Similar Items    Find
 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0954.pdf 
 Identifier    ZNB-1975-30b-0954 
 Volume    30 
10Author    Marianne Baudler, Yusuf Aktalay, Thomas Heinlein, Karl-Friedrich TebbeRequires cookie*
 Title    Contributions to the Chemistry of Phosphorus, 109 [1] J-BueAs2P6 -the First Phosphorus Arsenic Polycycle  
  Reference    Z. Naturforsch. 37b, 299—305 (1982); eingegangen am 12. Oktober 1981 
  Published    1982 
  Keywords    2, 2', 3, 3', 4, 4'-Hexa-ter<-butyl-l, l / -diarsa-2, 2', 3, 3', 4, 4'-hexaphospha-bicyclobutane, Phosphorus Arsenic Polycycle, Heterocyclophosphanes, Crystal Structure 
  Similar Items    Find
 TEI-XML for    default:Reihe_B/37/ZNB-1982-37b-0299.pdf 
 Identifier    ZNB-1982-37b-0299 
 Volume    37 
11Author    E. Hanecker, H. NöthRequires cookie*
 Title    Beiträge zur Chemie des Bors, 163 [1] Die Molekülstruktur zweier Silaborazine Contributions to the Chemistry of Boron, 163 [1] The Molecular Structure of Two Silaborazines  
  Reference    Z. Naturforsch. 40b, 717—721 (1985); eingegangen am 4. Januar 1985 
  Published    1985 
  Keywords    2, 3, 4, 5, 6-Pentamethyl-l, l-diphenyl-l-silaborazine, 2, 4, 5, 6-Tetramethyl-l, l, 3, 3-tetraphenyl-l, 3-disilaborazine, X-Ray Structure 
  Similar Items    Find
 TEI-XML for    default:Reihe_B/40/ZNB-1985-40b-0717.pdf 
 Identifier    ZNB-1985-40b-0717 
 Volume    40 
12Author    Joanne Mcgeachie, LindsayA. SummersRequires cookie*
 Title    Formation of Triradical Trications from Hexaquaternary Salts Derived from 4,4'-Bipyridine  
 Abstract    The syntheses of the hexaquaternary salts l,l'-bis-[2-(r-methyl-[4,4'-bipyridinium]-l-yl)-ethyl]-4,4'-bipyridinium hexaperchlorate and l,l'-bis-[3-(l'-methyl-[4,4'-bipyridinium]-l-yl)-propyl]-4,4'-bipyridinium hexaperchlorate are reported. The salts are reduced in aqueous solu­ tion to triradical trications at a potential (E0) of —0.24 V. We recently reported the preparation of tetra-quaternary salts derived from 4,4'-bipyridine of the 
  Reference    Z. Naturforsch. 41b, 1255—1259 (1986); received April 17 1986 
  Published    1986 
  Keywords    4, 4'-Bipyridinium Hexaquaternary Salts, Reduction Potentials, Triradical Trications 
  Similar Items    Find
 TEI-XML for    default:Reihe_B/41/ZNB-1986-41b-1255.pdf 
 Identifier    ZNB-1986-41b-1255 
 Volume    41 
13Author    Hans Möhrle, Heinz DwuletzkiRequires cookie*
 Title    Acylation Reactions of Enamines  
 Abstract    The ratio of isomeric enaminones, obtained by acylation of enamines with acid chlorides in the presence of triethylamine, depends on the possibility of forming isomeric enoles of the inter-mediate cyclobutanone adducts. 
  Reference    Z. Naturforsch. 42b, 503—506 (1987); eingegangen am 30. Oktober 1986 
  Published    1987 
  Keywords    Enamines, Enaminones, 1, 4, 5, 6-Tetrahydropyridines 
  Similar Items    Find
 TEI-XML for    default:Reihe_B/42/ZNB-1987-42b-0503.pdf 
 Identifier    ZNB-1987-42b-0503 
 Volume    42 
14Author    Josef Hahn, Tina NatanielRequires cookie*
 Title    Synthese und Eigenschaften von 3,6-Diorgano-3,6-dithio  
 Abstract    l,2,4,5,3,6-tetrathiadiphosphorinanen; eine neue Möglichkeit zur Knüpfung von S—S-Bindungen Synthesis and Properties of 3,6-D iorgano-3,6-dithio-l,2,4,5,3,6-tetrathiadiphosphorinanes; a New Possibility of Forming S—S Bonds 
  Reference    Z. Naturforsch. 42b, 1263 (1987); eingegangen am 15. Mai 1987 
  Published    1987 
  Keywords    3, 6-Diorgano-3, 6-dithio-l, 2, 4, 5, 3, 6-tetrathiadiphosphorinanes, 3, 5-Dimethyl-3, 5-dithio-l, 2, 4, 3, 5-trithiadiphospholan, Heterocycles, Formation of S -S Bonds 
  Similar Items    Find
 TEI-XML for    default:Reihe_B/42/ZNB-1987-42b-1263.pdf 
 Identifier    ZNB-1987-42b-1263 
 Volume    42 
15Author    Martin Hoch, Dieter RehderRequires cookie*
 Title    Carbonylniobium Chemistry, IV [1] Derivatives of ^ 5 -C5H5Nb(CO)4 with Tridentate Phosphines  
 Abstract    The photo-induced reaction between CpNb(CO)4 and Ph2P(CH2)2PR(CH2)2PPh2 (L; R = Ph, Cy) yields the chelated five-membered ring complexes cis-[CpNb(CO)2L] (two isomers in the case of R = Cy). The uncordinated PPI12 group reacts with CpNb(CO)3THF to form CpNb(CO)2(ia-L)CpNb(CO)3. IR, 31 P and 93 Nb NMR spectra are discussed and compared with corresponding data of the analogous vanadium complexes. 
  Reference    Z. Naturforsch. 38b, 446—448 (1983); received December 17 1982 
  Published    1983 
  Keywords    Carbonylniobium, 1, 4, 7-Triphosphaheptanes, 31 P NMR, 93 Nb NMR 
  Similar Items    Find
 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-0446.pdf 
 Identifier    ZNB-1983-38b-0446 
 Volume    38 
16Author    Christa Pomp, Stefan Drüeke, Heinz-Josef Küppers, Karl Wieghardt, Carl Krüger, Bernhard Nuber, Johannes WeissRequires cookie*
 Title    Synthese  
 Abstract    von [LRe(CO) 3 ] + -Komplexen mit makrocyclischen Liganden Die Kristallstrukturen von 1,4,7-TriazacycIononan-tricarbonyl-rhenium(I)-thiocyanat und 1,4,7-Trithiacyclononan-tricarbonyl-rhenium(I) -bromid-hemihy drat Synthesis of [LRe(CO) 3 ]" Complexes with Macrocyclic Ligands The Crystal Structures of l,4,7-Triazacyclononane-tricarbonyl-rhenium(I) Thiocyanate and of l,4,7-Trithiacyclononane-tricarbonyl-rhenium(I) Bromide Hemihydrate The tridentate macrocyclic ligands 1,4,7-triazacyclononane, its thia analogue 1,4.7-trithia-cyclononane, l-oxa-4,7-diazacyclononane, and N,N',N"-trimethyl-l ,4,7-triazacyclononane react with Re(CO) 5 Br in dimethylformamide to yield colorless, air-stable [LRe(CO) 3 ]Br complexes (L = tridentate macrocycle). With Mn(CO) 5 Br only the cyclic amines react to af-ford yellow-orange [LMn(CO),]Br complexes whereas 1.4,7-trithiacyclononane does not give stable complexes of manganese. The crystal structures of [([9]aneN 3)Re(CO) 3 ](NCS) and [([9]aneS 3)Re(CO) 3 ]Br-1/2 H : 0 have been determined. The former crystallizes in the orthorhom-bic space group Pbca (a = 12/763(4), b = 12.662(5), c = 17.472(9) Ä; Z = 8); whereas the latter crystallizes in the monoclinic space group P2,/c (a = 9.444(1). b = 11.797(2), c = 28.095(3) Ä. ß = 90,86(1); Z = 8). 
  Reference    Z. Naturforsch. 43b, 299—305 (1988); eingegangen am 9. Oktober 1987 
  Published    1988 
  Keywords    Crystal Structure, 1, 4, 7-Triazacyclononane 1, 47-Trithiacyclononane Complexes 
  Similar Items    Find
 TEI-XML for    default:Reihe_B/43/ZNB-1988-43b-0299.pdf 
 Identifier    ZNB-1988-43b-0299 
 Volume    43 
17Author    Ekkehard Fluck, Peter Kuhm, Heinz RiffelRequires cookie*
 Title    [l,4,2]Diazaphospholidine [l,4,2]Diazaphospholidines  
 Abstract    Bis(diethylamino)phosphanylacetylen reacts with N.N'-dimethyl thiourea to give 2-diethyl-amino-l,4-dimethyl-3-methylene-[l,4,2]diazaphospholidine-5-thion (2) besides the [1.3.4]thi-azaphospholidine (1). The latter compound is converted into 2 by heating. Reaction of 2 with various reagents yields other members of the title compound class. All new compounds are characterized by some reactions and their NMR and IR spectra. In addition, the results of an X-ray structure analysis of 2-diethylamino-l ,4-dimethyl-3-methylene-2-thioxo-[l ,4.2]diazaphos-pholidine-5-thion (5) are reported. 
  Reference    Z. Naturforsch. 43b, 1481—1489 (1988); eingegangen am 17. Mai 1988 
  Published    1988 
  Keywords    [l, 4, 2]Diazaphospholidines, NMR Spectra, Crystal Structure 
  Similar Items    Find
 TEI-XML for    default:Reihe_B/43/ZNB-1988-43b-1481.pdf 
 Identifier    ZNB-1988-43b-1481 
 Volume    43 
18Author    Evamarie Hey-Hawkins+, Stefan Kurz, G.Erhard BaumRequires cookie*
 Title    P-H-funktionelle Zirkonocen-Phosphido-Komplexe  
 Abstract    Synthese von Cp'2Zr{PH(2,4,6-Pr'3C6H2)}(X) (Cp = C5H4Me, X = Cl, 2,4,6-Pr'3C6H2) und Molekülstruktur von Cp'2ZrCl{PH(2,4,6-Pr/3C6H2)} P-H -Functionalized Zirconocene Phosphido Complexes -Synthesis of C p '2Zr{PH(2,4,6-Pr'3C6H 2)}(X) (Cp' = C5H 4 Me, X = Cl, 2,4,6-Pr'3C6H 2) and Molecular Structure of C p '2ZrCl{PH(2,4,6-Pr'3C6H 2)} The reaction of Cp'2ZrCl2 (Cp' = C5H4M e) with solvent-free LiPH(2,4,6-Pr'3C6H 2) yields the terminal zirconocene phosphido com plexes Cp'2ZrCl{PH(2,4,6-Pr'3C6H 2)} (1) (1:1 reac­ tion) or Cp'2Zr{PH(2,4,6-Pr'3C6H2)}2 (2) (1:2 reaction). 1 and 2 were characterized spectro­ scopically (NMR, IR, MS). An X-ray structure determination was carried out on 1 (Z r -P 2.6381(8) A, Z r-C l 2.4547(6) A , C l-Z r -P 93.55(2)°). 
  Reference    Z. Naturforsch. 50b, 239 (1995); eingegangen am 15. Septem ber 1994 
  Published    1995 
  Keywords    Zirconocene Phosphido Complexes, Lithium 2, 4, 6-Triisopropylphenylphosphide, Crystal Structure 
  Similar Items    Find
 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-0239.pdf 
 Identifier    ZNB-1995-50b-0239 
 Volume    50 
19Author    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 
  Similar Items    Find
 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0984_n.pdf 
 Identifier    ZNB-1975-30b-0984_n 
 Volume    30 
20Author    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 
  Similar Items    Find
 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0691.pdf 
 Identifier    ZNB-1978-33b-0691 
 Volume    33