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'NM R Spectra' in keywords Facet   Publication Year 1995  [X]
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1995[X]
1Author    M. Atthias Westerhausen, Wolfgang SchwarzRequires cookie*
 Title    Tetrakis(tetrahydrofuran-0)calcium-und -strontium-bis[bis(trimethylsilyl)- arsanid] -Vergleich der spektroskopischen Parameter sowie der Molekülstrukturen Tetrakis(tetrahydrofuran-0)calcium and Strontium Bis[bis(trimethylsilyl)- arsanide] -A Comparison of the Spectroscopic Param eters and the Molecular Structures  
 Abstract    Calcium-and strontium bis[bis(trimethylsilyl)amide] react with bis(trimethylsilyl)arsane in tetrahydrofuran to give the corresponding tetrakis(tetrahydrofuran-O) metal bis[bis(trime-thylsilyl)arsanides]. The calcium derivative crystallizes in the triclinic space group P I with a = 1191.7(2), b = 1232.0(2), c = 1655.0(2) pm, a = 102.46(1)°, ß = 107.92(1)°, y = 104.66(1)° and Z = 2, the strontium derivative in the orthorhombic space group Pbca with a = 2153.4(3), b = 1852.2(3), c -2182.4(3) pm and Z = 8. Both m olecules exist as frans-isomers with a nearly linear A s -M -A s moiety; however, the strontium analogue contains two remarkably different configurations for the arsenic atoms. One A s atom is surrounded nearly trigonally planar with a S r -A s bond length of 310 pm, whereas the other pnictogen atom has an angle sum of 338° with a S r -A s distance of 315 pm. 
  Reference    (Z. Naturforsch. 50b, 106 [1995]; eingegangen am 2. August 1994) 
  Published    1995 
  Keywords    Arsanide, Bis(trimethylsilyl)arsanide, Calcium, Strontium, NM R Spectra 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-0106.pdf 
 Identifier    ZNB-1995-50b-0106 
 Volume    50 
2Author    W. Erner Wolfsberger, WolfgangB. Urkart, Helmut WernerRequires cookie*
 Title    Darstellung und Charakterisierung substituierter Phosphinoether und -thioether Preparation and Characterization of Substituted Phosphinoethers and -thioethers  
 Abstract    The (diorganophosphinopropyl)alkyl ethers 1 -7 are prepared by hydrophosphination of allylalkyl ethers with secondary phosphines. The corresponding thioethers cannot be ob­ tained in a pure state by the same route. The nucleophilic ring opening of thiirane with lithium dialkyl phosphides, followed by the reaction with ClSi(CH3)3 or C1(CH2)20C H 3 pro­ duces the thioethers 8 -1 2 and 16. The silylated thioethers 8, 10 and 12 react with CH3OH/ H20 to give the phosphinoethyl thiols 13-15. All new compounds have been identified and characterized by elemental analyses, IR and NM R spectra. 
  Reference    Z. Naturforsch. 50b, 168—174 (1995); eingegangen am 13. September 1994 
  Published    1995 
  Keywords    Phosphinoethers, Phosphinothioethers, Phosphinothioles, NM R Spectra 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-0168.pdf 
 Identifier    ZNB-1995-50b-0168 
 Volume    50 
3Author    Monika Hiegemann, Helmut Duddeck, RichardR. Schmidt, A.Lexander ToepferRequires cookie*
 Title    NMR Investigation and Conformational Analysis of a Synthetic Hexasaccharide  
 Abstract    The structure of the hexasaccharide 1 has been examined by a spectroscopic investigation using one-and two-dimensional NM R spectroscopy All 'H and 13C signals of the saccharide part were assigned. N O E SY and ROESY experiments allowed to discuss the flexibility of the molecule. 
  Reference    Z. Naturforsch. 50b, 1091—1095 (1995); received Februay 2 1995 
  Published    1995 
  Keywords    Saccharides, Conformational Analysis, NM R Spectra, Hexasaccharide 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-1091.pdf 
 Identifier    ZNB-1995-50b-1091 
 Volume    50 
4Author    Ralf Keuper, Nikolaus RischRequires cookie*
 Title    Ruthenium(II)-Komplexe mit neuartigen 1,10-Phenanthrolinliganden Ruthenium (II) Complexes with New Kinds of 1.10-Phenanthrolin Ligands  
 Abstract    Different pathways to Ru-com plexes are described using the hitherto unknown S-type terpyridines 3 and the known U-type ligands 4. The resulting hexafluorophosphates 6 and 7 have been spectroscopically characterized by 'H NM R and IR data and also by mass spectro­ metry and cyclic voltammetry. 
  Reference    Z. Naturforsch. 50b, 1115—1120 (1995); eingegangen am 7. Februar 1995 
  Published    1995 
  Keywords    Terpyridines, Ruthenium, NM R Spectra, Cyclic Voltammetry 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-1115.pdf 
 Identifier    ZNB-1995-50b-1115 
 Volume    50 
5Author    Werner Wolfsberger, Jürgen Bank, Helmut WernerRequires cookie*
 Title    Synthese dreizähniger Phosphanliganden RP  
 Abstract    [(CH2)"Y]2 (Y = OR' oder C 0 2R', n = 1 oder 2) sowie einiger zweizähniger chiraler Phosphane R2PCH(CH3) C 0 2Me Synthesis of Tridentate Phosphine Ligands RP[(CH2)"Y]2 (Y = O R ' or C 0 2R ', n -1 or 2) and Some Bidentate Chiral Phosphines R2PCH (CH3) C 0 2Me The bis(y-alkoxypropyl)phosphines RP(CH2CH2O R ')2 1 -4 were prepared by the reaction 
  Reference    Z. Naturforsch. 50b, 1319—1328 (1995); eingegangen am 15. Mai 1995 
  Published    1995 
  Keywords    Tridentate Phosphine Ligands, Bidentate Chiral Phosphines, NM R Spectra 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-1319.pdf 
 Identifier    ZNB-1995-50b-1319 
 Volume    50 
6Author    Thomas Lambertsen, Reinhard SchmutzlerRequires cookie*
 Title    New Observations Concerning the Reactivity of Triorganotin Fluorides  
 Abstract    Me3SnF (1) reacts with many hydrolyzable chlorides to give M e3SnCl and the correspond­ ing fluoride. The formation of PhPF2, (ClCH2)M eSiF2, F2PCH2PF2 and PF5 is described. The reaction of triorganotin fluorides (Ph3SnF, Bu3SnF) with CaBr2 yields pure triorganotin bromides. 1 was found to act either as a fluoride donor. 
  Reference    Z. Naturforsch. 50b, 1583—1586 (1995); received April 10 1995 
  Published    1995 
  Keywords    Trimethylfluorostannane, Triorganohalo-Stannanes, Phosphorus-Fluorine Compounds, NM R Spectra 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-1583.pdf 
 Identifier    ZNB-1995-50b-1583 
 Volume    50 
7Author    Stefan Fuchs, H. Ubert SchmidbaurRequires cookie*
 Title    Phosphonic Acid Anhydrides [R P 0 2]": Oligomerization and Structure  
 Abstract    The phosphonic acid anhydrides of the general formula [R P 0 2]" have been prepared with R = Me, Et, z-Pr, r-Bu, and Ph from the corresponding phosphonic acids and their chlorides and esters. Mass spectrometric data indicate that the trimers are the dominant oligomers for all five systems. According to their NMR spectra, the methyl and r-butyl compounds have a symmetrical (C3v) structure with equivalent RP groups, while the ethyl, /-propyl and phenyl homologues have the Cs structure with non-equivalent PR groups in the ratio 1:2. 
  Reference    Z. Naturforsch. 50b, 855—858 (1995); received November 11 1994 
  Published    1995 
  Keywords    Organophosphonic Acid Anhydrides, Phosphonic Acid Anhydrides, Stereochemistry, NM R Spectra 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-0855.pdf 
 Identifier    ZNB-1995-50b-0855 
 Volume    50 
8Author    B. Gyurcsik3, N. Buzásb, T. Gajdab, L. Nagyb, E. Kuzmannc, A. Vértesc, K. BurgerbRequires cookie*
 Title    The Stability and Structure of Complex Species Formed in Equilibrium Reactions of Diethyltin(IV) with N-D-Gluconylamino Acids in Aqueous Solution  
 Abstract    Complex formation equilibria of diethyltin(IV) with five TV-D-gluconylamino acids in aque­ ous solution (I = 0.1 M, NaC104) were studied and the stabilities of the species were deter­ mined by potentiometric titrations. Diethyltin(IV) complexes of a-amino acid derivatives are water-soluble in the physiological pH range, while in the presence of 7V-D-gluconyl-/?-alanine a precipitate is formed, which dissolves with increasing pH. 13C NM R measurements showed that in the /V-D-gluconyl-a-amino acid complexes the ligand is coordinated through its depro-tonated carboxylate oxygen, amide nitrogen and C(2)-hydroxy group, while for the soluble /V-D-gluconyl-/?-alanine complex the ligand is coordinated via the deprotonated carboxylate and C(3)-, C(4)-, C(5)-hydroxy groups. Mössbauer measurements reflected the geometry of the complexes formed. 
  Reference    Z. Naturforsch. 50b, 515—523 (1995); received September 28 1994 
  Published    1995 
  Keywords    Diethyltin(IV), /V-D-Gluconylamino Acid Complexes, Potentiometry, Mössbauer Spectra, NM R Spectra 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-0515.pdf 
 Identifier    ZNB-1995-50b-0515 
 Volume    50 
9Author    RajK. Bansal, Neelam Gandhi, A. Schmidpeter, K. KaraghiosoffRequires cookie*
 Title    Synthesis of [l,2,4,3]Triazaphospholo[l,5-a]pyridines+  
 Abstract    Condensation o f 1,2-diaminopyridinium iodides with tris(dimethylamino)phosphine gives [l,2,4,3]triazaphospholo[l,5-a]pyridines 2a-d. Diethylamine adds to the N=P bond o f 2a, b only if the phosphorus is oxidized at the same time. Hydrolysis of 2 a opens the triazaphos-phole ring at its 2,3-bond. 
  Reference    Z. Naturforsch. 50b, 558 (1995); received October 21 1994 
  Published    1995 
  Keywords    l, 3-Diaza-2-phosphaindolizines, NM R Spectra, Mass Spectral Fragmentation, Hydrolysis, 1, 2-Addition Reactions 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-0558.pdf 
 Identifier    ZNB-1995-50b-0558 
 Volume    50 
10Author    Bernd Wrackmeyer, HeidiE. Maisel, Wolfgang MiliusRequires cookie*
 Title    2-Stannylpyridine-Borane Adducts -Multinuclear Magnetic Resonance Study and X-Ray Structure Determination of a l,4-Dihydro-4 a,l,4-azastannabora-naphthalene Derivative  
 Abstract    The adduct formation between 2-trimethylstannyl-pyridine (1) and triethylborane, leading to 2a, and 9-borabicyclo[3.3.1]nonane, leading to 2b, was studied by 'H, " B, 13C, 15N and 119Sn NMR in solution. Changes in the magnitude of the coupling constants 7(119Sn, 13C), with respect to the data for 1, were analysed. The absolute signs have been determined [all coupling constants " /(119Sn,13C) to methyl and pyridine carbon atoms in 1 to 3 possess a negative sign and the same is true for "y(119Sn,*H) of the pyridine hydrogen atoms] by various two-dimensional NMR experiments, and attributed to the influence of the lone pair of electrons at the nitrogen atom in 1. The NMR spectroscopic results for the 1,4-dihydro-4a,l,4-azastannabora-naphthalene derivative 3, in which structural fragments are present analogous to those in the borane adducts 2, correspond to those for 1 and 2a,b. The molecu­ lar structure of 3 has been determined by X-ray analysis [orthor' nombic; P 2 i2121; a = 713.9(2), b = 1566.0(2), c -1578.4(2) pm]. Solid-state 13C and 119Sn CP/MAS NM R spectra prove that the molecular structures of 3 in the solid state and in solution are very similar. 
  Reference    Z. Naturforsch. 50b, 809—815 (1995); received 
  Published    1995 
  Keywords    O ctober 28, 1994 2-Trimethylstannyl-pyridine, Borane Adducts, Heterobicycle, X-Ray, NM R Spectra 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-0809.pdf 
 Identifier    ZNB-1995-50b-0809 
 Volume    50 
11Author    LutzD. Ahlenburg, A.Lexander WolskiRequires cookie*
 Title    Oligophosphan-Liganden, XXXIX*  
 Abstract    (lS,2S)-fraw s-C yclopentan-l,2-diyl-bis(phosphan), C5H 8(P H 2)2? durch Reduktion eines diastereomerenreinen Cyclopentandiyl-bis(dioxaphospholans) O ligophosphine Ligands, X X X IX . (1 5,25')-rra/t5-C yclopentane-l,2-diyl-bis(phosphine), C5FI8(P H 2)2, by R eduction of a D iastereom erically Pure C yclopentanediyl-bis(dioxaphospholane) C hristine E ckert, The title compound (S, S)-2, has been obtained by reduction with Li[A lH 4] o f the cyclopen-tane-l,2-diyl-bis(l',3',2'-dioxaphospholane) (1 5 ,2 S)-frans-C5H 8[P (0 C H (C 0 2Pr-/)-(/ ?) -)2]2, (S, 5")-l, which itself was isolated in diastereomerically pure form (X-ray structure analysis) from the reaction between rac, /rfl«s-CsH8(PCl2)2 and (2 /? ,3 /?)-(+)-d iiso p ro p y l tartrate. C l e a v a g e o f (S ,.S)-1 w i t h P C U y i e l d e d a n u n s e p a r a b l e m i x t u r e o f (1 S , 2 S W r a n s -C 5 H 8(P C l 2) 2 a n d (4 R .5 R) -C l P [ 0 C H (C 0 2P r -t) -]2. 
  Reference    Z. Naturforsch. 50b, 1004—1008 (1995); eingegangen am 30. N ovem ber 1994 
  Published    1995 
  Keywords    Chiral Bis(phosphine) Reduction of P -O, X-Ray, Mass Spectra, NM R Spectra 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-1004.pdf 
 Identifier    ZNB-1995-50b-1004 
 Volume    50 
12Author    Neda, Michael Farkens, Holger Thönnessen, PeterG. Jones, Reinhard SchmutzlerRequires cookie*
 Title    Zur Chemie der l,3,5-Triaza-2-phosphorinan-4,6-dione. Teil X*. Umsetzungen von 2-Hydro  
 Abstract    l,3,5-trimethyl-l,3,5-triaza-2-oxo-2A4-phosphorinan-4,6-dion mit Triazin-Derivaten sowie mit einigen Aldehyden Chemistry of the l,3,5-Triaza-2-phosphorinan-4,6-diones. Part X*. Reactions of 2-H ydro-1,3,5-trim ethyl-1,3,5-triaza-2-oxo-2A4-phosphorinan-4,6-dione with Triazine Derivatives and with Some Aldehydes Ion 
  Reference    Z. Naturforsch. 50b, 1833—1 (1995); eingegangen am 8. Mai 1995 
  Published    1995 
  Keywords    1, 3, 5-Trimethyl-Substituted l, 3, 5-Triaza-2A 4 -phosphorinan-4, 6-diones, NM R Spectra, Mass Spectra, X-Ray 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-1833.pdf 
 Identifier    ZNB-1995-50b-1833 
 Volume    50