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Facet Publication Year 1980 [X]
Facet section ZfN Section B [X]

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6

101	Author	Herbert Meier, Hansjörg Gugel, Margret Barth, Udo Plücken	Requires cookie*
	Title	Konformationsuntersuchungen an benzokondensierten Achtringen Conformation Analysis of Benzo-Condensed Eight-Membered Rings
	Abstract	The annellation of 1-4 benzene rings to carbocyclic 8-rings increases stepwise the activation barrier for the ring inversion. A drastic consequence of the steric hindrance in the transition state is the rigidity of 9,10-dihydro-tribenzo[a,c,e]cyclooctenes at room temperature. With the aid of a complete analysis of the iH NMR spectra a decision is possible between fixed C2-conformations (e.g. 8) and Cs-conformations (e.g. 9).
	Reference	Z. Naturforsch. 35b, 477—481 (1980); eingegangen am 13. Dezember 1979
	Published	1980
	Keywords	Ring Inversion, NMR Spectra, Lanthanoid Shift Measurements
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	TEI-XML for	default:Reihe_B/35/ZNB-1980-35b-0477.pdf
	Identifier	ZNB-1980-35b-0477
	Volume	35

102	Author	Gerhard Klein, Adelbert Bacher	Requires cookie*
	Title	2,5-Diamino-6-hydroxy-4-ribitylaminopyrimidine-5'-phosphate
	Abstract	Riboflavin Biosynthesis, Deaminase, 2,5-Diamino-6-hydroxy-4-ribitylaminopyrimidine-5'-phosphate Cell extracts of Saccharomyces cerevisiae and Candida guilliermondii catalyze the hydro-lytic deamination in position 2 of 2,5-diamino-6-hydroxy-4-ribitylaminopvrimidine 5'-phosphate. The deaminase activity is absent in rib 2 mutants of S. cerevisiae. These findings confirm the biosynthetic pathway proposed earlier on the basis of metabolic and genetic studies [2].
	Reference	Z. Naturforsch. 35b, 482—484 (1980); received November 30 1979
	Published	1980
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	TEI-XML for	default:Reihe_B/35/ZNB-1980-35b-0482.pdf
	Identifier	ZNB-1980-35b-0482
	Volume	35

103	Author	Ebtisam Abdel, Aziz Hafez, Mohamed Ali, Elsayed Khalifa, Sayed Kamel, Ahmed Guda, MohamedHilmy Elnagdi	Requires cookie*
	Title	Reactions with the Arylhydrazones of a-Cyanoketones: Utility of Arylhydrazonomesoxalonitriles for the Synthesis of Azoles and Azolines
	Abstract	Arylhydrazones, a-Cyanoketones The arylhydrazonomesoxalonitriles derivatives 1 a-c were utilised for the synthesis of several new pyrimidine, pyridines, triazine and isoxazole derivatives. Compound la reacted with alkyl halides to yield the N-alkyl derivatives 12a, b. The latter reacted with hydrazines to yield the amidrazones 13 a, b.
	Reference	Z. Naturforsch. 35b, 485—489 (1980); received February 13/July 30 1979
	Published	1980
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	TEI-XML for	default:Reihe_B/35/ZNB-1980-35b-0485.pdf
	Identifier	ZNB-1980-35b-0485
	Volume	35

104	Author	Von Alkoholat, Wolf-H Giindel	Requires cookie*
	Title	Untersuchungen an quartären Pyridiniumsalzen, X [1] Eine Kondensationsreaktion von 3-Cyanpyridiniumsalzen bei Einwirkung A Condensation Reaction of 3-Cyanopyridinium Salts on Addition of Alcoxides
	Abstract	1-Benzyl-3-cyanopyridinium salts, in the benzyl moiety differently substituted, react in boiling alcohol with alcoxides to derivatives of hexahydro-dipyrido[l,2-a:3',2'-c]-pyrrole. At 20 °C occurs rearrangement to derivatives of 2-amino-3-pyridinecarbaldehyde.
	Reference	Z. Naturforsch. 35b, 490—493 (1980); eingegangen am 12. Dezember 1979
	Published	1980
	Keywords	Pyridinium Salts, Condensationreaction, Rearrangement
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	TEI-XML for	default:Reihe_B/35/ZNB-1980-35b-0490.pdf
	Identifier	ZNB-1980-35b-0490
	Volume	35

105	Author		Requires cookie*
	Title	Sila-Pharmaka, 16. Mitt. [1] SiJa-Analoga von Nifedipin-ähnlichen 4-Aryl-2.6-dimethyl-1.4-dihydropyridin-3.5-dicarbonsäure-dialkyle8tern, I Sila-Drugs, 16 th Communication [1] Sila-Analogues of Nifedipine-Like
	Reference	Z. Naturforsch. 35b, 494 (1980)
	Published	1980
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	TEI-XML for	default:Reihe_B/35/ZNB-1980-35b-0494.pdf
	Identifier	ZNB-1980-35b-0494
	Volume	35

106	Author	J. Schmitzer, K. Hustert, H. Parlar, F. Körte	Requires cookie*
	Title	Zur Struktur von verbrückten Photoisomeren der Cyclodieninsektizide Structure of Bridged Photoisomers of Cyclodiene Insecticides
	Abstract	Asymmetrically substituted chlorinated tetrahydro-4,7-methano-lH-indanes can be bridged photochemically into two types of isomerization products. These photoisomers can be distinguished on the basis of different geminal coupling constants in their X H NMR spectra. The structural assignment is not always certain, given only one photoisomer; it is unambiguous when both isomers are available.
	Reference	Z. Naturforsch. 35b, 502—506 (1980); eingegangen am 10. Dezember 1979
	Published	1980
	Keywords	Cyclodiene Insecticides, Photoisomerization, X H NMR Spectra
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	TEI-XML for	default:Reihe_B/35/ZNB-1980-35b-0502.pdf
	Identifier	ZNB-1980-35b-0502
	Volume	35

107	Author	Hanns-Dieter Amberger	Requires cookie*
	Title	Präparation von Brom-Elpasolithen für optische Untersuchungen The Electronic Structure of Highly Symmetrical Compounds of the f-Elements, XIV [1] The Preparation of Bromo-Elpasolites for Optical Measurements
	Reference	Z. Naturforsch. 35b, 507—508 (1980); eingegangen am 31. Dezember 1979
	Published	1980
	Keywords	Synthesis, Electronic Raman Spectra, Crystal Field Calculations
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	Identifier	ZNB-1980-35b-0507
	Volume	35

108	Author	ChrL. Teske	Requires cookie*
	Title	Darstellung, Kristallstrukturdaten und Eigenschaften der quaternären Thiostannate(IV) BaZnSnS4 und BaMnSnS4 Preparation, Crystal Data and Properties of the Quaternary Thiostannates(IV) BaZnSnS4 and BaMnSnS4
	Abstract	BaZnSnS4 and BaMnSnS4 were prepared for the first time and the atomic positions of the crystal structure were refined. Both compounds crystallize isotypically with BaCdSnS4 [1]. Space group C^-Fdd2 (No. 43) orthorhombic. BaZnSnS4: a = 2196,4; b = 2150,4; c = 1270,i pm; BaMnSnS4: a = 2173,i; b = 2144,9; c -1259,i.
	Reference	Z. Naturforsch. 35b, 509—510 (1980); eingegangen am 30. Oktober 1979
	Published	1980
	Keywords	Crystal Structure, Interatomic Distances, Zinc, Manganese, Sulfur
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	TEI-XML for	default:Reihe_B/35/ZNB-1980-35b-0509_n.pdf
	Identifier	ZNB-1980-35b-0509_n
	Volume	35

109	Author	ViqarUddin Ahmad, Q. Najmus-Saqib, K. Usmanghani, W. Fuchs, W. Voelter	Requires cookie*
	Title	New Triterpenoid from Primula denticulata
	Abstract	From the alcoholic extract of the plant Primula denticulata four main compounds could be isolated by column chromatography: Pri-dentigenin A, B, C and D. Several spectroscopic methods and the synthesis of several derivatives allow to determine the structure of Pridenti-genin B.
	Reference	Z. Naturforsch. 35b, 511—512 (1980); eingegangen am 27. Dezember 1979
	Published	1980
	Keywords	Triterpenoids, Primula denticulata, Structure Elucidation, X H NMR Spectra, 13 C NMR Spectra
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	Identifier	ZNB-1980-35b-0511_n
	Volume	35

110	Author	Rolf Appel, Ulrich Baumeister	Requires cookie*
	Title	Darstellung Diorganylamino-substituierter Carbodiphosphorane [1] Synthesis of Diorganylamino Substituted Carbodiphosphoranes [1]
	Abstract	Aminolysis of the P-chlorofunctional carbodiphosphorane Ph3P = C = PPI12CI (1) affords the diorganylamino substituted phosphonium salts PI13P—CH—PPh2(NR2)] + Cl~ (3a-e, R = alkyl), which can be dehydrohalogenated in good yield by NaH to give the neutral compounds Ph3P = C — PPli2(NR2) (4a-e). The structure of the hitherto unknown amino-carbodiphosphoranes has been confirmed by 31 P{ 1 H} and 13 C{ 1 H} NMR data as well as by hydrolysis to give 5, hydrochlorination to 6b, e and methylation to 7 a, e.
	Reference	Z. Naturforsch. 35b, 513—516 (1980); eingegangen am 7. Dezember 1979
	Published	1980
	Keywords	Carbodiphosphoranes, Diorganylamino Substitution, Base Reaction, 13 C NMR Spectra, 31 P NMR Spectra
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	TEI-XML for	default:Reihe_B/35/ZNB-1980-35b-0513.pdf
	Identifier	ZNB-1980-35b-0513
	Volume	35

111	Author	Marianne Baudler, Thomas Pontzen, Josef Hahn, Hans Ternberger, Wolfgang Faber	Requires cookie*
	Title	Beiträge zur Chemie des Phosphors, 96 [1] Darstellung und P-Kernresonanzspektrum von isotopen-substituiertem Trilithium-heptaphosphid, 6 Li3P7 Contributions to the Chemistry of Phosphorus, 96 [1] Preparation and 31 P NMR Spectrum of Isotopicly Substituted Trilithiumheptaphosphide, 6 Li3?7
	Abstract	The Pv-skeleton of trilithiumheptaphosphide, Li3P7 (1), was proved to possess the earlier reported tricyclic structure [2] by complete analysis of the 31 P NMR spectrum of 6Li3P7 observed at — 60 °C. The 6 Li isotopic substitution was carried out to avoid the line broadening caused by the large quadrupole moment of the 7 Li isotope. The unambiguous elucidation of the LisP7 structure confirmed that the exchange process which causes all P atoms to become equivalent above room temperature is analogous to that in bullvalene. A comparison of the chemical shifts with those of (Me3Si)3P7 leads to the result that the P7-skeleton in LisP7 is noticeably compressed along its threefold axis, thus indicating a predominant ionic character.
	Reference	Z. Naturforsch. 35b, 517—521 (1980); eingegangen am 29. Februar 1980
	Published	1980
	Keywords	Trilithiumheptaphosphide-6 Li3, 31 P NMR Spectroscopy, Fluctuating Molecule
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	TEI-XML for	default:Reihe_B/35/ZNB-1980-35b-0517.pdf
	Identifier	ZNB-1980-35b-0517
	Volume	35

112	Author	Gisela Beindorf, Joachim Strähle, Wolfgang Liebelt, Kurt Dehnicke	Requires cookie*
	Title	Nitrido-und Oxochlorokomplexe des Vanadiums(V); die Kristallstruktur von AsPh4 [V0C14] Nitrido and Oxochloro Complexes of Vanadium(V); the Crystal Structure of AsPh4[VOCl4]
	Abstract	Preparation, Nitrido and Oxochloro Complexes of Vanadium(V), IR Spectra, Crystal Structure The complexes AsPh4[Cl4V = N-Cl] and AsPhufVOCLi] are prepared by the reaction of AsPh4Cl with CI3VNCI and VOCI3, respectively. The IR spectra indicate C4v symmetry for the complex anions with multiple VN and VO bonds and a linear arrangement for the VNCl-group. AsPh4[VOCl4] crystallizes in the tetragonal space group P4/n with two formula units in the unit cell. The crystal structure was solved by X-ray diffraction methods (R = 0,062, 1096 observed, independent reflexions). The structure consists of AsPh4+ cations and [VOCl4] -anions with symmetry C4v. The extremely short VO bond length corresponds with a VO triple bond; its steric requirements cause the relatively large bond angle OVC1 of 103.4°. Übergangsmetalle von Elementen der 4. bis 8. Nebengruppe bilden mit Nitrido-und Oxoliganden Metall-Ligand-Mehrfachbindungen aus, die durch Überlappung unbesetzter d-Zustände des Über-gangsmetalls mit besetzten p-Orbitalen des O-bzw. N-Liganden Zustandekommen. Die Folgen davon sind kurze Metall-Ligand-Abstände, eine mit dem rc-Bindungsanteil korrespondierende sterische Be-lastung der übrigen Liganden und ein starker trans-Effekt, der die zur MO-bzw. MN-Bindung trans-orientierte Position koordinationschemisch benach-teiligt. Im Rahmen unserer Arbeiten zum Thema Übergangsmetallnitride, das wegen des möglichen Modellcharakters zur ^-Assimilation Bedeutung hat, berichten wir im folgenden über die Komplex-ionen [CI4VNCI]-und [CLVO]-. Während das Komplexion [C14VNC1]~ bisher unbekannt war, wurde das [Cl4V0]~-Ion mit verschiedenen Kationen bereits beschrieben, jedoch nur in bezug auf die VO-Valenzschwingung und das Elektronenspektrurn charakterisiert [1, 2].
	Reference	Z. Naturforsch. 35b, 522—525 (1980); eingegangen am 4. Januar 1980
	Published	1980
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	Identifier	ZNB-1980-35b-0522
	Volume	35

113	Author	Alexius Darmadi, Alois Haas, Bernd Koch	Requires cookie*
	Title	Vereinfachte Synthese und Reaktionen von Selenocarbonyldifluorid A Simplified Synthesis and Reactions of Selenocarbonyldifluorid
	Abstract	Tetrafluoro-l,3-diselenetane, Chemical Reactions, Selenocarbonyldifluorid SeCF2 is prepared on a preparative scale reacting AII3 with Hg(SeCF3)2 in octamethyl-cy clotetr asiloxane. It adds MF [M = Cs, Tl, [(CH3)4N] and Ag] to form MSeCF3. AgSeCF3 was also synthesized from AgF and B(SeCF3)3. Under the influence of sunlight SeCF2 dissolved in CFCI3 dimerizes quantitatively to 2,2,4,4-tetrafluoro-l,3-diselenetane, which above 360 °C pyrolyses to the monomer. The cyclic dimer reacts with B(SeCF3)3 to give (CF3Se)2CSe. The reaction of AgSeCF3 with CF"C13-"SC1 leads to CF3SeSCF"Cl3-n (n = 1, 2, 3). IR, NMR and mass spectra of the newly prepared compounds were presented.
	Reference	Z. Naturforsch. 35b, 526—529 (1980); eingegangen am 13. Dezember 1979
	Published	1980
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	TEI-XML for	default:Reihe_B/35/ZNB-1980-35b-0526.pdf
	Identifier	ZNB-1980-35b-0526
	Volume	35

114	Author	HeinzP. Fritz, OttoS. Huber	Requires cookie*
	Title	Die Elektrolyse von P4/HS03F-Miscliiingeii The Electrolysis of P4/HSO3F Mixtures
	Abstract	The electrolysis of P4/HSO3F mixtures does not yield detectable phosphorus-polyatomic cations; the intense coloration of the electrolyte is due to the known sulfur polyatomic cations originating from decomposition of HSO3F.
	Reference	Z. Naturforsch. 35b, 530—532 (1980); eingegangen am 4. Januar 1980
	Published	1980
	Keywords	Anodic Oxidation, White Phosphorus, Sulfur, Polyatomic Cations
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	TEI-XML for	default:Reihe_B/35/ZNB-1980-35b-0530.pdf
	Identifier	ZNB-1980-35b-0530
	Volume	35

115	Author	Joseph Grobe, Heinz Zimmermann	Requires cookie*
	Title	Elektrochemische Synthesen, IQ [1] Metallcarbonyle und Phosphan-Derivate der Elemente der Gruppe VI B Electrochemical Syntheses, III [1] Metal Carbonyls and Phosphane Derivatives of Group VI B Elements
	Abstract	The electrochemical synthesis of group VI B metal carbonyls and phosphane deriva-tives thereof from suitable metal complexes of oxidation state -f-HI (acetylacetonates, chloropyridin compounds) and from metal anodes is described.
	Reference	Z. Naturforsch. 35b, 533—538 (1980); eingegangen am 17. Dezember 1979
	Published	1980
	Keywords	Electrochemical Synthesis, Group VI B Metal Carbonyls, Phosphane Derivatives, High Pressure Cell
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	TEI-XML for	default:Reihe_B/35/ZNB-1980-35b-0533.pdf
	Identifier	ZNB-1980-35b-0533
	Volume	35

116	Author	Oswald Gürtler	Requires cookie*
	Title	Zur elektrochemischen Untersuchung von l-Phenyl-5-mercaptotetrazolen Electrochemical Investigation of l-Phenyl-5-mercaptotetrazoles
	Reference	Z. Naturforsch. 35b, 539 (1980)
	Published	1980
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	TEI-XML for	default:Reihe_B/35/ZNB-1980-35b-0539.pdf
	Identifier	ZNB-1980-35b-0539
	Volume	35

117	Author	Claus-Dierk Hager, Friedo Huber	Requires cookie*
	Title	Organobleiverbindungen von Mercaptocarbonsäuren Organolead Compounds of Mercaptocarboxylic Acids
	Abstract	Phenyllead Compounds, Methyllead Compounds, Organolead-S-mercaptocarboxylic Acids Triphenyl-and diphenyllead derivatives of mercaptocarboxylic acids (H2Mc) with general formulas Ph3Pb(HMc), (Ph3Pb)2Mc, Ph2Pb(HMc)2 and R2Pb(Mc) (R = Ph, Me) have been prepared by gentle reaction of H2Mc with Ph3PbOH, (Ph2PbO)n or Me2Pb(OH)2 in CHC13. According to spectroscopic data the ligand in all compounds is bound to Pb through S. Ph3Pb(HMc) (HMc = SCH2COOH, SCH2CH2COOH, SCH(CH3)COOH, SCH(COOH)CH2COOH forms dimers in the solid state and in CC14, Ph2Pb(CH2CH2COOH)2 forms polymers via H-bonded COOH groups. Ph3Pb(o-SC6H4COOH) is monomeric. For R2Pb(Mc) polymeric structures are proposed. Me3PbOH and H2Mc react to give an inter-mediate, which disproportionates to give Me2Pb(Mc) (Mc = SCH2COO, SCH2CH2COO) and Me4Pb.
	Reference	Z. Naturforsch. 35b, 542—547 (1980); eingegangen am 20. Dezember 1979
	Published	1980
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	TEI-XML for	default:Reihe_B/35/ZNB-1980-35b-0542.pdf
	Identifier	ZNB-1980-35b-0542
	Volume	35

118	Author	Sibbele Hietkamp, Reinhard Schmutzler	Requires cookie*
	Title	Eine neue Synthese von Fluorphosphonat-Komplexen des Palladiums und Platins A New Synthesis of Fluorophosphonato Complexes of Palladium and Platinum
	Abstract	Addition of phosphorus(III) ligands, L (L = tertiary phosphine, phosphite) to the reaction mixture of allyldifluorophosphite (1) with (C 6 H5CN)2MCl2 (2) (M = Pd, Pt) was found to produce two types of products: after a shorter reaction period, monofluoro-phosphonate complexes of the previously known type £rans-L2MCl(POF2) (6) are obtained while over prolonged periods of time bis-fluorophosphonato complexes, Zrans-L2M(POF2)2 (7) are formed. By contrast, Bu"OPF2 (8) yields a mixture of «rans-L2PtCl(POF2) (6) and <rons-L2PtCl[(Bu"0)(F)P0] (10) (L = Ph3P), the latter originating from (Bu re O)2PF formed by ligand scrambling in Bu*OPF2; no products containing more than one fluorophos-phonate group are formed in this case. The new monofluorophosphite, (CH2 = CHCH20)2PF (10) was found to react rapidly with (C6H5CN)2PtCl2/L with formation of L2PtCl[(CH2==CHCH20)(F)P0] (11). Compound characterization was by IR, 19 F and 31 P NMR spectroscopy.
	Reference	Z. Naturforsch. 35b, 548—553 (1980); eingegangen am 2. November 1979
	Published	1980
	Keywords	Palladium, Platinum, Fluorophosphonato Complexes
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	TEI-XML for	default:Reihe_B/35/ZNB-1980-35b-0548.pdf
	Identifier	ZNB-1980-35b-0548
	Volume	35

119	Author	Heinrich Homborg, Wilhelm Preetz, Günes Barka, Gernot Schätzel	Requires cookie*
	Title	Darstellung und spektroskopische Charakterisierung von Tetrahalogenooxalato-Osmaten(IY)
	Abstract	Reaction of [OsXe] 2-(X = CI, Br, I) with oxalic acid in water gives the very stable and deeply coloured new complexes [OsX40x] 2-which can be precipitated as alkali or tetra-alkylammonium salts. The salts with long-chain alkylammonium ions are soluble in all common no polar solvents. The IR and Ra spectra and the depolarization ratios are consistent with the local C2v-symmetry. The coupling between the vibrations of co-ordinated oxalate and with the skeletal [OsX402]-modes is apparently small. The optical spectra have been studied at low temperature (10 K). Analogous to [OsXe] 2-the very intense absorptions in the UV and VIS are assigned to the electric dipole allowed electron transfer from "(jr+cr)tiu, 7rt2U(y7), 7it2u(y8) and (<r-f-7r)tiu" to "dt2g". By the descent in symmetry each of these transitions is further split in three components (Ai, Bi, B2) corresponding to the three different groups of ligands, X2 tr -, X2 C -and ox. The distinction between the X2 tr ---Os and X2 C --> Os is caused by a static trans-effect and depends on the difference of the optical electronegativities induced by ox. This splitting is not observed for [OsCLiox] 2 -but is about 900 cm- for [OsBr4ox] 2 -and 1200 cm" 1 for [OsI4ox] 2 -. The well defined bands in the NIR and VIS are assigned to the intraconfigurational d-d-transitions between the spin-orbit components in the octahedral doublegroup Oh* splitted by the lower C2v-symmetry. Some of the zero-phonon transitions within the split of the 3 Tig, Oh-groundstate exhibit extremely high intensities (e~2500 cm 2 /mmol). The assign-ment of these transitions is improved by the electronic Ra spectra. The finestructure of some of the d-d-transitions originates from coupling with Ai vibrational modes especially with Vs(C-O).
	Reference	Z. Naturforsch. 35b, 554—563 (1980); eingegangen am 10. Dezember 1979
	Published	1980
	Keywords	Tetrahalooxalato-osmates(IV) UV-VIS Spectra, IR Spectra, Raman Spectra
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	Identifier	ZNB-1980-35b-0554
	Volume	35

120	Author	Franz Lux, OskarF. Beck, Heinz Krauß, David Brown, TzeC. Tso	Requires cookie*
	Title	Spektralreines Bis(phthalocyaninato)protactinium(rV) Spectroscopically Pure Bis(phthalocyaninato)protactinium(IV)
	Abstract	Spectroscopically pure PaPc2 has been prepared by reaction between Pal4 • 4 CH3CN and o-phthalic acid dinitrile in 1-chloronaphthalene followed by sublimation at 5 • 10~ 3 Pa in a temperature profile with three clearly defined zones (520 °C/350 °C/room temperature). This procedure gives a product almost completely free of H2Pc impurity which is known to have been present in previously reported complexes of the type AnPc2. Thus, the trace of H2Pc in the substance could only be detected by derivative spectroscopy. X-ray powder diffraction shows the compound to be isostructural with ThPc2 and UPc2. The ligand spectrum is typical of AnPc2 complexes, f-f Bands observed in a solid state spectrum provide additional proof that the compound is Pa IV Pc2.
	Reference	Z. Naturforsch. 35b, 564—567 (1980); eingegangen am 21. Januar 1980
	Published	1980
	Keywords	Protactinium(IV) Complexes, Phthalocyaninato Complexes, Ligand Spectra, Structure, X-ray
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	TEI-XML for	default:Reihe_B/35/ZNB-1980-35b-0564.pdf
	Identifier	ZNB-1980-35b-0564
	Volume	35

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