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1Author    Bernd WrackmeyerRequires cookie*
 Title    Organoborierung von Alkinylstannanen, VI [1] Alienbildung bei einer Deorganoborierung Organoboration of Alkynylstannanes, VI [1] Formation of an Allene by Deorganoboration  
 Abstract    The thermal decomposition of some l,l-bis(trimethylstannyl)-2-dialkylborylalkenes leads unexpectedly to substituted allenes. The structural information is based on *H, 11 B, 13 C and 119 Sn NMR data and also on the strong IR band at 1882 cm" 1 . 
  Reference    Z. Naturforsch. 33b, 385—389 (1978); eingegangen am 18. Januar 1978 
  Published    1978 
  Keywords    Deorganoboration, Allenes, NMR 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0385.pdf 
 Identifier    ZNB-1978-33b-0385 
 Volume    33 
2Author    Kurt MoedritzerRequires cookie*
 Title    -Chloro-and l-Hydroxyphospholene-l-stilfides l-Chlorophospholene-l-sulfi.de Isomers, 1-Hydroxyphospholene-l-sulfide Isomers  
 Abstract    A mixture of the two isomers of 1-chlorophospholene-l-oxide, obtained by a one-step, high-yield procedure reported previously 1 , upon reaction with P4S10 was converted to a mixture of the two isomers of 1-chlorophospholene-l-sulfide which may be separated by spinning-band distillation. The thus obtained isomerically pure 1-chlorophospholene-1-sulfides were hydrolyzed to the corresponding 1-hydroxyphospholene-l-sulfides. These, as well as the precursor chloro compounds, were characterized by iH, 13 C, and 31 P NMR, mass spectrometry, and IR. 
  Reference    (Z. Naturforsch. 31b, 709—713 [1976]; received January 20 1976) 
  Published    1976 
  Keywords    NMR, Mass Spectra, IR 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-0709.pdf 
 Identifier    ZNB-1976-31b-0709 
 Volume    31 
3Author    Fritz Seel, Fritz SchinnerlingRequires cookie*
 Title    Darstellung und thermische Zersetzung von Erdalkalimetall-Carbamoylphospliaten Preparation and Thermal Decomposition of Carbamoylphosphates of Alkaline-earth Metals  
 Abstract    After the formation of carbamoylphosphate through the reaction of KH2PO4 with KNCO in aqueous solution, unreacted phosphate and carbamoylphosphate can be separated by fractional precipitation with barium (first step) and calcium or strontium or barium salt solutions (second step) at low temperatures. The carbamoylphosphates of the alkaline earth metals are decomposed above 100 °C to yield predominantly diphosphates and urea. In aqueous suspensions the decomposition proceeds even at room temperature. -The chemical shifts of the phosphorus atom of the carbamoylphosphate ion between pH 6.5 and 8.2 are given. 
  Reference    Z. Naturforsch. 33b, 374—381 (1978); eingegangen am 31. Januar 1978 
  Published    1978 
  Keywords    Carbamoylphosphates, Preparation, Decomposition, NMR 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0374.pdf 
 Identifier    ZNB-1978-33b-0374 
 Volume    33 
4Author    Uwe KlingebielRequires cookie*
 Title    Reaktionen von Lithio-aminofluorsilanen mit Halogensilanen und Trimethylzinnchlorid Reactions of Lithio-aminofluorosilanes with Halogensilanes and Trimethyltinchloride  
 Abstract    Fluorosilanes react with lithium amides and organolithium compounds to give amino-fluorosilanes. (Lithioamino)fluorosilanes are formed by the reaction of aminofluoro-silanes with butyllithium depending on the steric influence and molecular stabilization of the ligands. These lithium salts react with halogensilanes and trimethyltin chloride with substitution. By LiF elimination the lithio-aminofluorosilane C6H5-SiF-NLiC(CH3)3-N(p-C6H4CH3Si(CH3)3) cyclisizes through a (2-j-2)cycloaddition and SiC-H-cleavage. 
  Reference    Z. Naturforsch. 33b, 521—526 (1978); eingegangen am 3. Januar/21. Februar 1978 
  Published    1978 
  Keywords    Lithio-aminofluorosilanes, Substitution, Cyclisation, NMR 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0521.pdf 
 Identifier    ZNB-1978-33b-0521 
 Volume    33 
5Author    Anton Meiler, Walter Maringgele, Klaus-Dieter Kablau, R3b @bullet, R. —n=c 'r, B. R. N=cRequires cookie*
 Title    Umsetzungen von Metall-und Metalloidverbindungen mit mehrfunktionellen Molekülen, XVIII [1] Synthese von Amidinoborazinen Reactions of Metal and Metalloid Compounds with Polyfunctional Molecules, XVIII [1] Synthesis of Amidinoborazines  
 Abstract    The reaction of trimethylsilylamidines with 2-chloro-l,3,4,5,6-pentamethylborazine leads to the corresponding amidinoborazines and chlorotrimethylsilane. 1 H, 11 B, n F NMR spectra, mass spectra and characteristic IR group frequencies are reported. Umsetzungen von Trialkylboranen mit Amidinen ergeben nach Die Si-N-Bindung wird durch Halogenborane meist unter milden Bedingungen nach 
  Reference    Z. Naturforsch. 33b, 891—895 (1978); eingegangen am 5. Mai 1978 
  Published    1978 
  Keywords    Chloroborazines, Silylamidines, Amidinoborazines, NMR 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0891.pdf 
 Identifier    ZNB-1978-33b-0891 
 Volume    33 
6Author    OttoJ. Scherer, Norbert Kuhn, Heribert JungmannRequires cookie*
 Title    Elementorganische Amin/Imin-Verbindungen, XIX [1] Phospha(III)azen-Komplexe des Platins Elementorganic Amino/Imino Compounds, XIX [1] Phospha(III)azene Complexes of Platinum  
 Abstract    Reacting Zeise's salt with the phospha(III)azene (R3C)(R3Si)N-P = N-CR3 (R = CH3) (1) one gets the platinum phospha(III)azene complex (2), Cl2PtI<2 (L = 1). 2 adds water and methanol to the P=N bond of the phospha(III)azene ligand with formation of 3, Cl2Pt(PRR2 1)2 (R = (CH3)3SiO, R 1 = (CH3)3CNH) and 4, Cl2Pt(PRR 1 R 2)2 (R = CH30, R 1 = (CH3)3CNH, R2 = (CH3)3SiNC(CH3)3). 2, 3 and 4 have trans configuration, 4 also forms a mixture of the meso and d, 1 isomers. For 2 a P-a coordination of the phospha(III)-azene ligand is proposed. Die inzwischen in größerer Anzahl bekanntge-wordenen Phospha(III)azene des Typs A [la] /Py -W X N-A I 
  Reference    Z. Naturforsch. 33b, 1321—1324 (1978); eingegangen am 12. Juli 1978 
  Published    1978 
  Keywords    Synthesis, Addition Reactions, Diastereoisomers, NMR 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-1321.pdf 
 Identifier    ZNB-1978-33b-1321 
 Volume    33 
7Author    HansH. KarschRequires cookie*
 Title    Funktionelle Trimethylphosphinderivate, VIII [1] Phosphoniumsalze, Oxide und Sulfide von Tetraorganodiphosphinomethanen, R2PCH2P(CH3)2  
 Abstract    Tetramethyldiphosphinomethane (CH3)2PCH2(CH3)2 (la) reacts with HCl/ether to form the mono-and bisquaternary salts [(CH3)2PCH2P(H)(CH3)2]C1 (2) and [(CH3)2(H)PCH2P(H)(CH3)2]Cl2 (3), respectively. The system 1 a/HCl, incorporating 1 a/2/3, represents a useful tool for studying the appearance of XnAA'X'n-spin type systems. These compounds are also prototypes for a variety of other mono-or bis-phosphonium salts, which are formed in the reactions of the diphosphines (CH3)2PCH2PR2 (R — CH3, *-C4H9, C6H5) (la-c) with (CH3)2C0 + HC1, CH3I, *-C4H9Br, C6H5C0C1, (CH3)2PC1 and Br(CH2)nBr (n = 1, 2). Heterocycles are not obtained. The dioxide 14 and the disulfide 15 are also described. Some properties and spectroscopic data (IR, 1 H, 31 P and 13 C NMR) of 26 new compounds are reported and briefly discussed. 
  Reference    (Z. Naturforsch. 34b, 31—43 [1979]; eingegangen am 8. September 1978) 
  Published    1979 
  Keywords    Phosphonium Salts, Oxides, Sulfides, NMR 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0031.pdf 
 Identifier    ZNB-1979-34b-0031 
 Volume    34 
8Author    Wolfgang BuderRequires cookie*
 Title    Darstellung und spektroskopische Untersuchung von Trimethoxysilylpropylsulfanen Synthesis and Spectroscopy of Silylsulfanes  
 Abstract    The preparation of the sulfanes [(CH30)3Si-(CH2)2-]2Sra (n = 1-4) 2-5 and the cor-responding mercaptane 1 is communicated. The *H and 13 C NMR spectra of 1-5 are reported and discussed. The infrared and Raman spectra are discussed in view of C-S-and S-S-bonding. 
  Reference    Z. Naturforsch. 34b, 790—793 (1979); eingegangen am 21. Dezember 1978/16. März 1979 
  Published    1979 
  Keywords    Silylsulfanes, Mercaptane, IR, NMR 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0790.pdf 
 Identifier    ZNB-1979-34b-0790 
 Volume    34 
9Author    Gert Bauer, Gerhard Hagele, Peter SartoriRequires cookie*
 Title    Reaktionen polyhalogenierter Cyclobutane mit Trimethylphosphit Reactions of Polyhalogenated Cyclobutenes with Trimethylphosphite  
 Abstract    Polyhalogenated cyclobutanes are synthesized and dehalogenated to cyclobutenes bv means of trimethylphosphite. Im Zusammenhang mit unseren Untersuchungen über die Arbuzov-Reaktion polyhalogenierter Cyclo-butene [1-3] wandten wir uns der Darstellung und Dehalogenierung von Cyclobutanderivaten zu. In diesem Zusammenhang studierten wir auch die Um-setzungen von C4ClnFg_n (n = 2-5), C4Hn Br2F6-n (n = 0 und 1) und C4H2CI3F3 mit Trimethylphosphit. Während die höherfluorierten Cyclobutane GiClnFs-n {n = 2-4) und auch C4H2CI3F3 bekanntlich durch Auto-bzw. Co-Cycloadditionsreaktionen zu-gänglich sind [4-14], bleibt dieser Weg für das 1.1.2-Trifluorpentachlorcyclobutan C4CI5F3 ver-schlossen. Wir erhielten die gesuchte Verbindung erstmalig durch UV-aktivierte Photochlorierung ge-mäß: F H F \ Cl; • <V-2 HCl F Cl F \ Cl, F \ H UV/120' C/30h /f \ Cl m ci ci Cl Cl 1a als farblose, sublimierbare Substanz vom Schmp. 105,5 °C mit einer Ausbeute von 46%. 1.2-Dibromhexafluorcyclobutan C4Br2F6 kann prinzipiell durch Cycloaddition von CF2=CFBr ge-wonnen werden [4]. Hier stellten wir die gewünschte Verbindung aber vorteilhafter durch lichtaktivierte Addition von elementarem Brom an Hexafluor-cyclobuten mit 96-proz. Ausbeute dar [15]. Im Gegensatz zur Cycloaddition führt die Bromierung nicht zu einem Gemisch der cis/trans-Isomeren, sondern lediglich zu einem der beiden isomeren C4Br2F6. Wir vermuten, daß es sich hierbei um die Transform handelt und wollen dies künftig aus * Sonderdruckanforderungen an Prof. Dr. Gerhard Hägele. 0340-5087/79/9000-1249/$ 01.00/0 der expliziten Spektralanalyse entsprechender [ABC]2-19 F-NMR-Spektren ableiten. Eine analog [16] durchgeführte Bromierung von 1-H-pentafluorcyclobuten verläuft dagegen nicht stereospezifisch. Hier fanden wir eis-und trans-CiHB^Fö im molaren Verhältnis 1:4 mit einer Gesamtausbeute von 60% vor. Die von uns ge-troffene Zuordnung der Isomeren beruht auf einer vollständigen, iterativen Analyse von ABCDEX-Spektren, deren Ergebnisse im experimentellen Teil der vorliegenden Arbeit wiedergegeben sind. Bei unseren Versuchen polyhalogenierte Cyclo-butane mit Trimethylphosphit zur Reaktion zu bringen interessierte uns die Fragestellung, ob die Bildung von Cyclobutan-substituierten Phosphon-säuredimethylester durch Arbuzov-Reaktionen nachgewiesen werden kann, etwa nach: ^ Ä ^ (2) P(0)(0CHJ)S Unter den hier gewählten Bedingungen bilden die Cyclobutane mit Sicherheit keine Phosphonsäure-ester. Es war ferner von Interesse festzustellen, ob die dehalogenierende Wirkung des Trimethylphosphits [17] zur Abspaltung von H-X oder F-X (X = F, Cl, Br) aus den gemischt-halogenierten Cyclobutan-abkömmlingen synthetisch ausgenutzt werden kann. Unsere Versuche zeigten, daß unter relativ milden Bedingungen praktisch nur X-X (X = Cl, Br) durch Trimethylphosphit abspaltbar ist. Es werden Cyclo-butene gebildet nach: S. % S3 \ Ay P(0CHJ)J Sj \ X -CHsX/' tCHj OfePtOl X S< X S, * ^ S2 ^S, (3) 1250 G. Bauer-G. Hagele • Reaktionen polyhalogenierter Cyclobutene mit Trimethylphosphit 1250 Hierbei werden die Bromderivate C4H"Br2F6_n (n = 0 und 1) besonders rasch zu C4HnF6_n {n = 0 und 1) debromiert. In der Serie der Chlor-Fluor-Cyclobutane C4ClnF8_n (n = 3-5) nimmt die Reakti-vität auffallend zu mit wachsendem Chlorgehalt. Man erhält die Cyclobutene C4Cln_2F8_n {n = 3-5). C4CI2F6 und C4H2CI3F3 verhalten sich dahingegen inert. Es sei erwähnt, daß das aus C4CI3F5 entstandene 1-Chlorpentafluorcyclobuten C4CIF5 in situ mit wei-terem Trimethylphosphit zu einem Phosphoran reagiert [1] gemäß: (4) n H ^PfFKOCH), F F X= Cl Das Verhalten polyhalogenierter Cyclobutene unter den Bedingungen der Arbuzov-Reaktion behandeln wir systematisch in der nachfolgenden Arbeit [1]. Tab. I stellt die Ergebnisse unserer nach Gl. (3) intendierten Versuche übersichtlich dar: Tab. I. Umsetzung polyhalogenierter Cyclobutane mit Trimethylphosphit. Edukt Reaktion Aus-beute [%] Produkt (la) C4CI5F3 (lb) C4CI4F4 (lc) C4CI3F5 (ld) C4C12F6 (le) C4Br2F6 stark exotherm 90 stark exotherm 90 schwach exotherm * keine Reaktion — stark exotherm 70 90 C4CI3F3 (2 a) C4C12F4 (2b) C4CIF5 (2 c) (1 f) C4HBr2F5 stark exotherm (lg) C4H2C13F3 keine Reaktion C4F6 C4F5H (2e) (21) 
  Reference    Z. Naturforsch. 34b, 1249—1251 (1979); eingegangen am 3. April/10. Mai 1979 
  Published    1979 
  Keywords    Dehalogenation, Cyclobutanes, Photochlorination, NMR 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-1249.pdf 
 Identifier    ZNB-1979-34b-1249 
 Volume    34 
10Author    V. P. Tarasov, V. I. Privalov, G. A. Kirakosyan, YuA. BuslaevRequires cookie*
 Title    Scalar Second-Kind Relaxation of 27 A1, 69 Ga and 71 Ga Nuclei in Aluminium and Gallium Complexes  
 Abstract    Spin-spin and spin-lattice relaxation times of nuclei 69 > 71 Ga, 27 A1, 14 N in anions [MClnBr4_n]-and the solvate complexes [M(CH3CN)6] 3+ , produced from dissolution of MCI3 and MBr3 in the mixture CH3CN + CH3N02 (M = Ga, Al), are measured in the temperature range from —40 up to + 70 °C. It is shown that nuclear spins of 69 > 71 Ga, 27 A1 relax in the anionic and cationic complexes by means of the second-kind scalar and quadrupole relaxation mechanisms (due to the relaxation of the nuclei 35 ' 37 C1, 79 ' 81 Br, 14 N). The complexes [MClwBr4_n]-and [M(CH3CN)6] 3+ in the investigated solutions are inert and do not undergo exchange processes in the NMR time scale. The scalar spin coupling constants in [M(CH3CN)6] 3+ are determined from the scalar contribution to the relaxation rate of 69 -71 Ga, 27 A1, and the measured relaxation time of 14 N in the solvate complex; the results are Ga-14 N) -59 ± 5 Hz, J(71 Ga-14 N) = 74 ± 6 Hz, J(27 Al-i 4 N) = 22 ± 2 Hz. 
  Reference    Z. Naturforsch. 38b, 1173—1181 (1983); received May 3 1983 
  Published    1983 
  Keywords    Aluminium, Gallium, Relaxation, NMR 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-1173.pdf 
 Identifier    ZNB-1983-38b-1173 
 Volume    38 
11Author    Herbert Schumann, Wolf-Walther Du MontRequires cookie*
 Title    Organometallphosphin-substituierte Übergangsmetallkomplexe, XXII 1 Darstellung und komplexchemisches Verhalten von Dimethylstannandiylbis(di-terl-butylphoshin) Organometal-phosphine Substituted Transition Metal Complexes, XXII 1 Synthesis and Coordinating Behaviour of Dimethylstannandiylbis(di-fer£-butylphosphine)  
 Abstract    Dimethylstannandiylbis(di-£er£-butylphosphine) reacts with tetracarbonyl nickel under formation of tricarbonyl-dimethylstannandiylbis(di-£er^butylphosphine)nickel and poly-meric dicarbonyl-dimethylstannanediylbis(di-£er£-butylphosphine)nickel and with hexa-carbonylchromium under UV-irradiation as well as with tetracarbonyl-norbornadiene-chromium yielding tetracarbonyl-dimethylstannandiylbis(di-£er£-butylphosphine)-chromium. IR and NMR spectra of the new compounds are discussed. 
  Reference    (Z. Naturforsch. 31b, 90—94 [1976]; eingegangen am 27. August 1975) 
  Published    1976 
  Keywords    Organotinphosphines, Substituted Transition Metal Carbonyl Complexes, NMR 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-0090.pdf 
 Identifier    ZNB-1976-31b-0090 
 Volume    31 
12Author    Willy GomblerRequires cookie*
 Title    Partiell fluorierte Dialkyldisulfane Partially Fluorinated Dialkyldisulfanes  
 Abstract    Gaseous methylsulfenylchloride, CH3SCI, reacts with active potassium fluoride at 100 °C to give methyl(fluoromethyl)disulfane, CH3SSCH2F. This compound decomposes at room temperature to yield dimethyldisulfane and bis(fluoromethyl)disulfane. The new compounds have been identified by iH and 19 F NMR and mass spectra. 
  Reference    (Z. Naturforsch. 31b, 727—729 [1976]; eingegangen am 4. Februar/5. März 1976) 
  Published    1976 
  Keywords    Sulfur-fluorine Chemistry, Sulfenylhalides, Preparation, NMR, Mass Spectra 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-0727.pdf 
 Identifier    ZNB-1976-31b-0727 
 Volume    31 
13Author    Silke Bratan-Mayer, Frank Strohbusch, Wolfram HanselRequires cookie*
 Title    IR-und NMR-spektroskopische Untersuchungen an Rubazonsäuren 1 . Ein ungewöhnliches Achtring-Protonenchelat mit Doppelminimumpotential IR and NMR Spectroscopic Studies on Rubazonic Acids 1 . An Unusual Eight-Membered Ring Proton Chelate with Double Minimum Potential  
 Abstract    The IR and NMR spectra of rubazonic acids 1 and 2 show that these compounds form only OH tautomers in nonpolar solvents and in the crystalline state. They are stabilized by a strong intramolecular hydrogen bond in an eight-membered ring. The IR and NMR spectra show that they exhibit a symmetrical structure. The hydrogen bond has a double minimum potential. Alteration of the symmetry of substitution in 1-and 1'-positions markedly influences the signal of the OH proton. This symmetry effect is discussed. Rubazonsäure 2 (la) und ihre Derivate (lb-r) liegen in aprotischen Lösungsmitteln geringer Polarität und im Kristall als OH-Tautomere in der Z-s-cis-Form mit einer sehr starken intramolekula-ren Wasserst off brücke vor 3 . Das gleiche gilt für die strukturanalogen Verbindungen 2a-h 4 . Wegen der großen Ähnlichkeit ihrer physikahschen und chemi-schen Eigenschaften sollen die beiden Substanz-klassen im folgenden als C-und N-Rubazonsäuren bezeichnet werden. R 3 1 R 3 ' I AN Y-N , Ri ^ '' V 
  Reference    (Z. Naturforsch. 31b, 1106—1115 [1976]; eingegangen am 5. März/13. Mai 1976) 
  Published    1976 
  Keywords    Rubazonic Acids, IR, NMR, Intramolecular Hydrogen Bonding 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-1106.pdf 
 Identifier    ZNB-1976-31b-1106 
 Volume    31 
14Author    C. E. May, K. Niedenzu, S. TrofimenkoRequires cookie*
 Title    Spectroscopic Studies on Pyrazaboles  
 Abstract    The mass spectra of several pyrazaboles of type 1 where R and'or R' = C2H5 have been studied. The loss of boron-bonded hydrocarbon moieties under electron impact is the predominant feature of all spectra. Some ultraviolet and nuclear magnetic resonance data on compounds of type 1 have been collected; bulky substituents were observed to lead to conformational isomers that can be detected by 13 C NMR spectroscopy. 
  Reference    Z. Naturforsch. 33b, 220—223 (1978); received October 11 1977 
  Published    1978 
  Keywords    Pyrazaboles, Dimeric Aminoboranes, Boron Compounds, Mass Spectra, NMR 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0220.pdf 
 Identifier    ZNB-1978-33b-0220 
 Volume    33 
15Author    OttoJ. Scherer, Ngoc-Tram Külbach, Walter GlässelRequires cookie*
 Title    Elementorganische Amin/Imin-Verbindungen, XVIII [1] Amino-Imino-Thiophosphorane: er 3 , A 5 -Phosphazene Elementorganic Amino/Imino Compounds, XVIII [1] Aminoiminothiophosphoranes: o 3 , / 5 -Phosphazenes  
 Abstract    The reaction of the aminoiminothiophosphoranes (1) with methanol yields the bisamino-thiophosphoric acid derivatives (3). la and IV b ->VTb element halides form the new P-N element four membered rings 4->-7, which partially exist as a mixture of eis and trans isomers. Different ylide group transfer is observed on the reaction of la with trimethyl -phosphine or trimethyl phosphite. With trimethylphosphine (CH3)3P(S) and a phos-pha(III)azene are formed, with trimethyl phosphite (CH30)3P = NC(CH3)3 and the [2 + 2] cycloaddition product of la and (R3C)(R3Si)N-P = S (R = CH3) can be isolated. 
  Reference    Z. Naturforsch. 33b, 652—656 (1978); eingegangen am 16. Februar/13. März 1978 
  Published    1978 
  Keywords    Ring Closure Reactions, Ylide Group Transfer, NMR 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0652.pdf 
 Identifier    ZNB-1978-33b-0652 
 Volume    33 
16Author    Ekkehard Lindner, Gottfried VordermaierRequires cookie*
 Title    Bifunktionelle Acyl(diorganyl)phosphane und ihr Verhalten gegenüber molekularem Sauerstoff Bifunctional Acyl(diorganyl)phosphanes and their Behavior Towards Molecular Oxygen  
 Abstract    The bifunctional acylphosphanes RC(0)P(Ph)-(CH2)2-(Ph)PC(0)R (1 a-c) [R = CH3 (a), CF3 (b), CßHö (c)] are obtained from [NaP(Ph)CH2-]2 and the corresponding acid chlorides RC(0)C1. Etherical solutions of la-c with molecular oxygen easily can be transformed into the dioxides [RC(0)P(0)(Ph)CH2-]2 (2a-c). In contrast to the monofunctional acyl(diaryl)phosphane oxides 2 a-c do not react with water at 25 °C. The 31 P, 19 F, iH NMR and IR spectra of the new compounds 1, 2 a-c are discussed. 
  Reference    Z. Naturforsch. 33b, 1457—1460 (1978); eingegangen am 13. September 1978 
  Published    1978 
  Keywords    Bifunctional Acylphosphanes, Acylphosphane Oxides, IR, NMR 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-1457.pdf 
 Identifier    ZNB-1978-33b-1457 
 Volume    33 
17Author    Fritz Preuss, Joachim WoitschachRequires cookie*
 Title    Reaktion des Orthovanadinsäure-tri-£erf-butylesters mit Monocarbonsäuren Reaction of Tris-/er£-butylorthovanadate with Monocarboxylic Acids  
 Abstract    Tris-tert-butylorthovanadate VO(OC4H9)3 undergoes reaction with monocarboxylic acids to yield monomeric VO(OC4H9)(RCOO)2; no VO(OC4H9)2(RCOO) or VO(RCOO)3 could be isolated from the reaction mixture. Polymeric dioxovanadium(V)-monocarbox-ylates(V02RC00) n are formed by thermolysis or partial hydrolysis of VO(ÖC4H9)(RCOO)2; the reaction mechanism is studied and discussed. Syntheses of Ba[V02(CH3C00)3], Ba[V02(C2H5C00)3] and N(C4H9)4[V408Br(CH3C00)4] are described. All compounds obtained are characterized by IR and X H NMR spectroscopy as well as by chemical reactions. The carboxyl groups are mostly acting as bidentate ligands. 
  Reference    Z. Naturforsch. 34b, 163—171 (1979); eingegangen am 11. Mai/17. Juli/2. Oktober 1978 
  Published    1979 
  Keywords    Vanadium(V)-monocarboxylates, Preparation, NMR, IR 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0163.pdf 
 Identifier    ZNB-1979-34b-0163 
 Volume    34 
18Author    Bernd WrackmeyerRequires cookie*
 Title    3 C-und 119 Sn-NMR-Spektren von Thienylstannanen 13 C and 119 Sn NMR Spectra of Thienylstannanes  
 Abstract    The assignment of some 13 C chemical shifts in 2-thienylstannanes has to be reversed. Proton coupled 119 Sn NMR spectra are shown to be useful to detect long range Sn-H coupling, not readily obtained from complex *H NMR spectra. 
  Reference    Z. Naturforsch. 34b, 235—237 (1979); eingegangen am 23. Oktober 1978 
  Published    1979 
  Keywords    Thienylstannanes, NMR, Sn-H Long Range Coupling 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0235.pdf 
 Identifier    ZNB-1979-34b-0235 
 Volume    34 
19Author    C. Cnossen-Voswijk, J. C. Van De GrampelRequires cookie*
 Title    Methyl-and Ethylamino Derivatives of the Ring System cis-NPC12(NS0X)2 with X = Chlorine and Fluorine  
 Abstract    Aminolysis of c£s-NPCl2(NSOX)2, with X = Cl or F, by MeNH2 and EtNH2 proceeds via a geminal substitution pattern. Preparation of the mono-and disubstituted derivatives is described, the NMR data are discussed. 
  Reference    Z. Naturforsch. 34b, 850—855 (1979); received February 12 1979 
  Published    1979 
  Keywords    Methylamino Derivatives, Ethylamino Derivatives, Preparation, NMR 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0850.pdf 
 Identifier    ZNB-1979-34b-0850 
 Volume    34 
20Author    U. '. Tifat, R. Lyatifov, StanislavP. Solodovnikov, ValeryN. Babin, RosaB. MaterikovaRequires cookie*
 Title    Salts of Ferricinium Cation and its Homologues: NMR Investigation, I On Mechanisms of Spin Derealization in Salts of Ferricinium and l,l'-Dimethylferricinium Cation  
 Abstract    X H and 13 C NMR spectra of hexafluorophosphates of ferricinium (1) and 1,1'-dimethyl -ferricinium cations (2) and the EPR spectrum of 2 were recorded. Pseudocontact and contact contributions of isotropic shift were calculated and constants of hyperfine inter-action estimated according to Jesson. It is shown that the calculations of pseudocontact and contact shift via magnetic susceptibility components according to Kurland and McGarvey do not change the signs of HFS constants. According to the suggested mecha-nisms of spin derealization the jz-contribution is the dominating one. 
  Reference    Z. Naturforsch. 34b, 863—866 (1979); received October 10 1978/January 23 1979 
  Published    1979 
  Keywords    Ferricinium, l, l'-Dimethylferricinium, Spin Derealization, NMR 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0863.pdf 
 Identifier    ZNB-1979-34b-0863 
 Volume    34 
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