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1Author    Requires cookie*
 Title    Darstellung und Eigenschaften von und Reaktionen mit metallhaltigen H etero­ cyclen, X X X V III [1]  
 Abstract    Fünf-und sechsgliedrige Oxaphosphamolybdacycloalkane durch reduktive Cycloeliminierung P rep aratio n and P ro p erties of, and R eactions w ith, M etal-C ontaining H eterocycles, X X X V III [1] Five-and S ix-M em bered O xaphospham olyb-dacycloalkanes by R eductive C ycloelim ination E k k eh a rd L indner* und A n d re as Brösam le The reductive cycloelim ination o f the com plexes Lm(Br)M oPPh20 (C H 2)n-Cl (3a,b) [n = 2 (a), 3 (b); LmMo = 775-C5H 5M o(C O)2], which can be obtained from the reaction o f PPh2Ö —(C H 2)n—Cl (la ,b) and 
  Reference    Z. Naturforsch. 39b, 535 (1984); eingegangen am 11. N ovem ber 1983 
  Published    1984 
  Keywords    O xaphospham olybdacycloalkanes, NM R Spectra, Mass Spectra 
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 TEI-XML for    default:Reihe_B/39/ZNB-1984-39b-0535_n.pdf 
 Identifier    ZNB-1984-39b-0535_n 
 Volume    39 
2Author    JensA. Nhaus, Z. Afar, A. Siddiqi, Jürgen Schimkowiak, H. Erbert, W. Roesky, H. Eiko LuekenRequires cookie*
 Title    Darstellung und Eigenschaften von Cyclo-1 A6-metalla-3,5-ditha-2,4,6-triazenen Synthesis and Properties of Cyclo-lÄ6-metalla-3,5-dithia-2,4,6-triazenes Tam m annstraße 4, D -3400 G öttingen  
 Abstract    The metallacycles [C13M S2N 3]2 (M = M o, W) l a and 2a have been obtained from reactions of S4N 4 with M o2C l10 and WC16, respectively, and from S3N 3C13 with the hexacarbonyls M (C O)6. The adducts C13MS2N 3 • CH 3CN lb and 2 b are form ed with acetonitrile, and the salts [Ph4A s~][C l4MS2N 3~] l c and 2c with addition o f Ph4A sC l. R eactions o f M o2C110 and WC16, respectively, with related S —N com pounds lead predom inantly to l a and 2a; M o2C110 reacts with S 3N 2C12 to give l a , and with [M e3SiN ]2S to give [Cl3M oN ]t. while W Cl6 yields C14WNSC1 with S 3N 2C12, and 2a with [M e3SiN ]2S. [Cl3M oN ]v does not react with S4N 4, but [C13W N]A . forms 2a. R eactions of VC14 and V O C l3 with [M e3SiN ]2S give [Cl2V S 2N 3]v, 3. 2c has also been obtained by 
  Reference    Z. Naturforsch. 39b, 1722—1728 (1984); eingegangen am 13. Septem ber 1984 
  Published    1984 
  Keywords    Sem i-conductor, H eterocycles, NM R spectra, Susceptibility 
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 TEI-XML for    default:Reihe_B/39/ZNB-1984-39b-1722.pdf 
 Identifier    ZNB-1984-39b-1722 
 Volume    39 
3Author    Joseph Grobe, Jürgen SzameitatRequires cookie*
 Title    Reaktive E =C (p—p);r-Systeme, X [1] Darstellung und Reaktivität von Perfluor-3-phosphapent-2-en (1) Preparation and Reactivity of Perfluoro-3-phosphapent-2-ene (1)  
 Abstract    Preparation o f F SC2P = C (F)C F 3, Cycloaddition to D ien es, 
  Reference    Z. Naturforsch. 41b, 974 (1986); eingegangen am 27. März 1986 
  Published    1986 
  Keywords    Chiral Phosphanes, Mass Spectra, NM R Spectra 
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 TEI-XML for    default:Reihe_B/41/ZNB-1986-41b-0974.pdf 
 Identifier    ZNB-1986-41b-0974 
 Volume    41 
4Author    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 
5Author    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 
6Author    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 
7Author    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 
8Author    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 
9Author    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 
10Author    H.-OK. Alinow, C. K. Rack3, K. E. Rm Elb, H. Riath, Am JareebRequires cookie*
 Title    Isolation and Characterization of l-Tigloyl-3-acetylazadirachtol from the Seed Kernels of the Thai Neem Azadirachta siamensis Valeton  
 Abstract    The Thai neem A. siamensis (Valeton) is the main source for botanical insecticides in Thailand. Although azadirachtin A (aza A) is present in Thai neem, there are som e other related compounds which may contribute to its bioefficiency. Analytical HPLC of Thai neem samples showed a peak closely eluted with azadirachtin. A large-scale cleanup involving two liquid/liquid extraction steps, silica filtration, and finally two successive preparative HPLC separations, resulted in the pure compound, which was identified as l-tigloyl-3-acetylazadi-rachtol by ID -and 2D -'H and 13C NM R spectroscopy. 
  Reference    Z. Naturforsch. 52b, 1413—1417 (1997); received August 4 1997 
  Published    1997 
  Keywords    Thai N eem, Azadirachtin, Limonoids, NM R Spectra, Structure 
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 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-1413.pdf 
 Identifier    ZNB-1997-52b-1413 
 Volume    52 
11Author    Ekkehard Fluck3, Gerd Beckerb, Bernhard Neumüllerb, Robert Kneblb, Gem Ot Heckmannb, Heinz RiffelbRequires cookie*
 Title    Ein Derivat des lA5,3A5,5A3-TriphosphabenzoIs A Derivative of lA5,3A5,5A3-Triphosphabenzene  
 Abstract    The title compound was prepared by reacting l,l,3,3-tetrak is(d im eth ylam in o)-lA 5,3A5-diphos-phete with 2,2-dim ethylpropylidynephosphane and characterized by N M R spectra and X-ray structure analysis. 
  Reference    Z. Naturforsch. 42b, 1213—1221 (1987); eingegangen am 19. M ai/16. Juli 1987 
  Published    1987 
  Keywords    lA5, 3A5, 5A3-Triphosphabenzene, NM R Spectra, Crystal Structure 
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 TEI-XML for    default:Reihe_B/42/ZNB-1987-42b-1213.pdf 
 Identifier    ZNB-1987-42b-1213 
 Volume    42 
12Author    Jochen Ellermann, Norbert WillRequires cookie*
 Title    Chemie polyfunktioneller Moleküle, 104 [1] Gold-, Palladium-und Platinchlorokomplexe von (±)-2-[N,N-Bis(2-diphenylphosphinoethyl)amino]-tetrahydro- 2 //-l,3,2-oxazaphosphorin-2-oxid Chemistry of Polyfunctional Molecules, 104 [1] Gold-, Palladium-and Platinumchlorocomplexes of (±)-2-[N,N-Bis(2-diphenylphosphinoethyl)amino]-tetrahydro- 2 H-l ,3,2-oxazaphosphorine-2-oxide  
 Abstract    Reaction o f AuC1(C8H i4) with (Ph2PC H 2C H 2)2N -P (O)N (H)C H 2C H 2CH 20 (2) gives the 
  Reference    (Z. Naturforsch. 44b, 127 [1989]; eingegangen am 2. N ovem ber 1988) 
  Published    1989 
  Keywords    Noble M etals, IR Spectra, Raman Spectra, NM R Spectra 
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 TEI-XML for    default:Reihe_B/44/ZNB-1989-44b-0127.pdf 
 Identifier    ZNB-1989-44b-0127 
 Volume    44 
13Author    JörnM. Üller, Corinna Hänsch, Joachim PickardtRequires cookie*
 Title    ;r-01efin-Iridium-Komplexe, XV [1] Kationische Bis(2.3-dimethylbutadien)iridium-L-Verbindungen mit verschiedenen Donorliganden L jr-Olefin Iridium Complexes, XV [1] Cationic Bis(2.3-dim ethylbutadiene)iridium-L Compounds with Various D onor Ligands L  
 Abstract    (dm b)2IrCH , (dm b = 2.3-dim ethylbuta-l,3-diene) reacts with Ph,CBF4 in C H 2C12 to form the 
  Reference    Z. Naturforsch. 44b, 278 (1989); eingegangen am 10. Oktober 1988 
  Published    1989 
  Keywords    Synthesis, IR Spectra, NM R Spectra, Mass Spectra, Crystal Structure 
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 TEI-XML for    default:Reihe_B/44/ZNB-1989-44b-0278.pdf 
 Identifier    ZNB-1989-44b-0278 
 Volume    44 
14Author    RobinK H Arris, LawrenceH. Merwin, G.Erhard HägeleRequires cookie*
 Title    Salts of Phosphonic Acid Derivatives: Illustrative Examples of Solid State NMR Spectroscopy  
 Abstract    H igh-resolution solid state 1 3 C, 23Na and 31P N M R data have been obtained for the acid form and for several salts o f the phosphonic acids: eth an e-1 ,2 -diphosphonic acid, ethane-l-hydroxy-1.1-diphosphonic acid (H E D P), and 3-am ino-l-hydroxypropan e-l,l-d ip hosp hon ic acid. The data provide evidence by which sample purity and crystallinity may be exam ined and from which the size o f the asymmetric unit may be determ ined. In the case o f the sodium salts o f ethane-1.2-diphosphonic acid, the 3IP and _3Na spectra provide evidence o f possible motion or bond fluctionality for the phosphonic acid group. 
  Reference    Z. Naturforsch. 44b, 1407 (1989); received July 4 1989 
  Published    1989 
  Keywords    NM R Spectra, Solid State Phase Phosphonic A cid, Phosphorus, Carbon 
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 TEI-XML for    default:Reihe_B/44/ZNB-1989-44b-1407.pdf 
 Identifier    ZNB-1989-44b-1407 
 Volume    44 
15Author    Z. NaturforschRequires cookie*
 Title    Chemie polyfunktioneller Moleküle, 114 [1]  
 Abstract    Synthese und Struktur eines ionischen und nichtionischen, cyclischen Carbaphosphazens und eines Cobalt(III)phosphazen-Komplexes C hem istry of Polyfunctional M olecules, 114 [1] Synthesis and Structure of an Ionic and N on Ionic Cyclic C arbaphosphazene and of a C o b alt(III)phosphazene Com plex Jochen E llerm ann3 *, Jörg S u tter3, Falk A. K noch3, M atthias M oll3, W alter B au e rb Reaction of Ph2 P -N -P (P h 2) -N -(Ph2)PCoP(Ph2) -N -P (P h 2) -N -PPh2 (1) in CH2 C12 with benzimidazole yields (CH2 -PPh2 = N -PPh2 = N -PPh2)+C l" ([4]+C L). The salt [4]+BPh4" has been prepared in THF by metathesis of [4]+C l_ with N aBPh4. D eprotonation of the cationic ring in [4]+BPh4_ was accomplished using l,8-diazabicyclo[5.4.01 7 ]undec-7-ene and resulted in the six-membered carbacyclophosphazene CH=PPh2 -N = P P h 2 -N = P P h 2 (6). Treating 1 with 8 -hydroxyquinoline in CH2 C12 yields the octahedral c/s-complex (N 0) 2 CoP(Ph2) -N -P (P h 2) -N -P P h 2 (7) (N O = 8 -oxyquinolinate group). The com ­ pounds [4]+BPh4~, 6 and 7 are characterized by their IR, Raman, 3 1 P{1H) NM R, 1 3 C{1 H} N M R , !H NMR and mass spectra. Crystals suitable for X-ray structure analyses have been obtained for [4]+BPh4_ and_7x0.5 CH2 C12. The colourless plates of [4]+BPh4_ crystallize in the triclinic space group P I, with the lattice constants a = 1172.7(3), b = 1326.2(3), c = 1806.1(6) pm; a = 100.79(2), ß = 103.71(3), y = 108.18(2)°. The black blocks o f 7 x 0 .5 C H 2 C12 crystallize in the monoclinic space group P 2 x!c with the lattice constants a = 1159.0(10), b = 2008.9(10), c = 2034.6(12) pm; ß = 105.86(5)°. 
  Reference    Z. Naturforsch. 49b, 1763—1773 (1994); eingegangen am 25. April 1994 
  Published    1994 
  Keywords    Cyclic Carbaphosphazene Systems, Cobalt Complexes, Syntheses, NM R Spectra, X-Ray 
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 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-1763.pdf 
 Identifier    ZNB-1994-49b-1763 
 Volume    49 
16Author    Z. NaturforschRequires cookie*
 Title      
 Abstract    C om plexes of the types R3 P b -F e (C O)2Cp [R = Me (la), Et (lb), 'Pr (lc), 'Bu (Id)]. R2 Pb[Fe(CO)2 Cp] 2 [R = Me (2a), Et (2b)], 'Pr2 (B r)P b -F e(C O)2Cp (3c) and [R2 PbFe(CO) 4 ] 2 [R = Me (4a), Et (4b), 'Pr (4c)], as well as the spiro-complexes Pb[Fe(C O)4 PbR2 ] 2 [R = Me (5a), Et (5b), 'Pr (5c)] and Pb[Fe(CO) 4 ] 4 (6) were studied by multinuclear magnetic reso­ 
  Reference    Z. Naturforsch. 49b, 1781—1788 (1994); received July 28 1994 
  Published    1994 
  Keywords    Carbonyliron-Lead Complexes, NM R Spectra, Coupling Sign Determination, X-Ray 
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 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-1781.pdf 
 Identifier    ZNB-1994-49b-1781 
 Volume    49 
17Author    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 
18Author    Wolfgang Einholz, W. Alter Gollinger, Wolfgang HauboldRequires cookie*
 Title    Ligandenaustauschreaktionen zwischen Halogenboranen und Alkylsilanen Ligand Exchange Reactions between H aloboranes and Alkylsilanes  
 Abstract    In a ligand exchange reaction betw een B H al, (Hal = Cl, Br) and the tetraalkylsilanes E t4Si, (M e,Si)2C H 2 or Ph2CH SiM e3 the alkylhaloboranes E tB B r2 or M eBH al: and the alkylhalosilanes E t,SiB r, H alM e2S i-C H 2-S iM e 3, (H alM e2Si)2C H 2, and Ph2CHSiM e2Br, respectively, are formed. Similarly, the methyloligosilanes (M e3Si)2 (1) and (M e,Si)2SiMe2 (2) react with BHal, (H al = Cl, Br, I) via m ethyl-halogen-transfer to give H alM e2Si—SiMe, (Hal = Cl, Br, I), (H alM e2Si)2 (Hal = Br, I), H alM e2Si —SiMe2—SiM e,, (M e,Si)2SiM eHal, HalM e2Si —SiMeHal —SiMe,, (H alM e2Si)SiMe2 (Hal = Cl, Br) or (B rM e2Si)2SiMeBr besides M eBHal2 (Hal = Cl, Br. I) and M e2BI, respectively. 
  Reference    (Z. Naturforsch. 45b, 25—30 [1990]; eingegangen am 31. August 1989) 
  Published    1990 
  Keywords    A lkylhaloboranes, Trialkylhalosilanes, Alkylhalodisilanes and -trisilanes, Synthesis, NM R Spectra 
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 TEI-XML for    default:Reihe_B/45/ZNB-1990-45b-0025.pdf 
 Identifier    ZNB-1990-45b-0025 
 Volume    45 
19Author    M. Anfred Fild, PeterG. Jones, Karsten Ruhnau, Carsten ThöneRequires cookie*
 Title    Darstellung und Strukturen von 2,2,4,4-Tctrafluor-l,3-diphosphctancn und -1,3-diphosphetan-disulfiden Synthesis and Structures of 2,2,4,4-Tetrafluoro-l,3-diphosphetanes and of -1,3-diphosphetane Disulfides  
 Abstract    A simple route to 1,3-diphosphetanes [RPCF2]2 [R = Ph, Me, Bu'] is described. The phos-phaalkene intermediates RP=CF2, as well as the corresponding disulfides [R (S)PC F2]2 have been characterized. The crystal structures of [PhPCF2]2, and of the sulfides [Ph(S)PCF2]2 and [Bu'(S)PCF2]2 are reported. 
  Reference    Z. Naturforsch. 49b, 1361—1367 (1994); eingegangen am 6. Juni 1994 
  Published    1994 
  Keywords    Phosphaalkenes, 1, 3-Diphosphetanes, 1, 3-Diphosphetane Disulfides, NM R Spectra, Crystal Structure 
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 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-1361.pdf 
 Identifier    ZNB-1994-49b-1361 
 Volume    49 
20Author    Peter Dierkes, Kurt Dehnicke, Dieter FenskeRequires cookie*
 Title    Diinkomplexe  
 Abstract    von Wolfram(VI). D ie Kristallstruktur von [(Et2S)WCl4(Me3S i-C = C -(C H 2)4 -C = C -S iM e 3)WCl4(SEt2)] Diyne Complexes of Tungsten(VI). The Crystal Structure of [(Et2 S)WCl4 (M e3Si -C = C -(C H 2)4-C ^ C -SiMe3) WCl4 (SEt2)] The diyne complexes [(Et2S)W C l4(R -C ^ C -(C H 2)" -C = C -R)W C l4(SEt2)] (R = SiM e3, n = 3, 4, 8; R = C6H 5, n = 4, 8) have been prepared by the reaction o f /rarcs-[WCl4(SEt2)2] with the corresponding diyne in toluene solutions. The com plexes form green or orange, diamagne­ tic, moisture sensitive crystal powders, which were characterized by their IR and 13C NM R spec­ tra. The crystal structure of the com plex with R = SiM e3 and n = 4 has been determined. [(Et2S)WCl4(M e3S i-C = C -(C H 2)4-C = C -S iM e 3)W Cl4(SE t2)]: Space group P2j/c, Z -2, 3620 observed unique reflections with I>2a(I), R = 0.027. Lattice dimensions at -7 0 °C: a -1431.8(11), b -839.6(8), c = 1731.3(11) pm, ß = 112.74(2)°. The structure consists o f m ole­ cules in which both tungsten atom s are surrounded by four chlorine atoms in equatorial positions, both alkyne groups are bonded side on (rj2) to the tungsten atoms, whereas the sulfur atoms of the diethylsulfide molecules are located trans to the alkyne groups. 
  Reference    Z. Naturforsch. 49b, 1391—1396 (1994); eingegangen am 17. Mai 1994 
  Published    1994 
  Keywords    Diyne Complexes of Tungsten(VI), Synthesis, IR Spectra, NM R Spectra, Crystal Structure 
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 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-1391.pdf 
 Identifier    ZNB-1994-49b-1391 
 Volume    49 
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