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'Synthesis' in keywords Facet   Publication Year 1990  [X]
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1990[X]
1Author    Georg Ingram, Peter Jaitner, KarlEberhard SchwarzhansRequires cookie*
 Title    Synthese und Charakterisierung ruthenocen-und osmocenhaltiger Hetero-Oligometallocene Synthesis and Characterization of Hetero-Oligometallocenes Containing Ruthenocene and Osmocene  
 Abstract    Improved syntheses o f ruthenocene (Rue) and osm ocene (Osc) are described. These lithiated metallocenes (R ucLi,_3 and OscLi,_3) react with cobaltocenium-hexafluorophosphate (C oc+PF6~) to give the corresponding oligom etallocenes C oc+-R u c P F 6~ (1), l,l'-(C o c +)2-Ruc(PF6)2 (2), C oc+-O sc P F 6" (4), and l,l'-(C o c +)2-O sc (P F 6)2 (5). The products were charac­ terized by IR, MS, N M R and elemental analysis. 
  Reference    Z. Naturforsch. 45b, 781 (1990); eingegangen am 15. Dezember 1989 
  Published    1990 
  Keywords    Hetero-Oligometallocenes, Ruthenocene, Osmocene, Synthesis 
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 TEI-XML for    default:Reihe_B/45/ZNB-1990-45b-0781.pdf 
 Identifier    ZNB-1990-45b-0781 
 Volume    45 
2Author    Siegfried PohlRequires cookie*
 Title    Thioharnstoff-Derivate als Liganden in  
 Abstract    Eisen-Komplexen: Synthese und Kristallstrukturen von [FeI2L2l, [Fe2I4L3], (L -L) 2+|FeI4-| 2 (L = (M e2N)2CS) und |Fe2I4(C6H l0(N H -C S -N H M e)2)2| mit einer Notiz zu [FeIL3]+|Fe4S4I3L]-T hiourea D erivatives as Ligands in Iro n Complexes: Syntheses and C rystal Structures o f [F eI2L2], [ F e J 4 L3], (L -L) 2 +[FeI4-] 2 (L = (M e2N)2CS) an d [Fe2I4(C 6H 10(N H -C S -N H M e) 2)2] and a N o te on [F eIL 3]+[F e4S4I3L]~ U lrich Bierbach, W olfgang Saak, D etlev H aase u nd [FeI2L2] (1) and [Fe2I4L3] (2) are obtained from the reaction o f F e l2 and 
  Reference    (Z. Naturforsch. 45b, 45 [1990]; eingegangen am 26 Juli / 18. September 1989) 
  Published    1990 
  Keywords    Thiourea Complexes, Iron C om pounds, Synthesis, Crystal Structure 
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 TEI-XML for    default:Reihe_B/45/ZNB-1990-45b-0045.pdf 
 Identifier    ZNB-1990-45b-0045 
 Volume    45 
3Author    WolfgangA H Errm Ann, JosefK. Felixberger, JosefG. Kuchler, Eberhardt HerdtweckRequires cookie*
 Title    Alkin-Komplexe des Rheniums in hohen Oxidationsstufen Alkyne Complexes of Rhenium in High Oxidation States  
 Abstract    The class o f ^-alkyne complexes o f metals in medium and high oxidation states has been extended by the type C H 3R e 0 2(R C = C R) (3a-i). Exchange o f alkyne for oxo ligands under reducing conditions has been employed as a new general synthesis. C om pounds 3 are thus ob­ tained by reaction o f methyltrioxorhenium(VII) (1) with the alkynes 2 a -i in the presence o f a ca. 1.1-fold molar amount o f polymer-bound triphenylphosphane as reducing agent ( 
  Reference    Z. Naturforsch. 45b, 876—8 (1990); eingegangen am 30. N ovem ber 1989 
  Published    1990 
  Keywords    M ethyloxorhenium Alkynes, Synthesis, Crystal Structures 
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 TEI-XML for    default:Reihe_B/45/ZNB-1990-45b-0876.pdf 
 Identifier    ZNB-1990-45b-0876 
 Volume    45 
4Author    Michael Schäfer, Jürgen Pebler, Beatrice Borgsen, Frank Weller, K. Urt DehnickeRequires cookie*
 Title    21Sb-Mössbauer-spektroskopische und strukturchemische Untersuchungen an Kronenetherkomplexen SbX3(15-Krone-5) mit X = F, Cl, Br, I. Eine Analyse der Orbitalbesetzungszahlen 12lSb-M össbauer-Spectroscopic and Structural Investigations on Crown Ether Complexes SbX3(15-Crown-5) with X = F, Cl, Br, I. A Population Analysis Crown Ether C om plexes SbX3(15-crown-5)  
 Abstract    The crown ether complexes SbX3(15-crown-5) with X = F, Cl, Br, and I have been prepared by reactions o f 15-crown-5 with the corresponding antimony trihalides in acetonitrile solu­ tions. The com pounds were characterized by IR spectroscopy as well as by l21Sb-M össbauer spectroscopy. A m ethod o f orbital population analysis utilizing both M össbauer isomer shifts and quadrupole coupling has been developed for Sb(III) antimony halides and their crown ether com plexes. SbF 3(l 5-crown-5) was also characterized by an X-ray structure determination: Space group P 2 ,/«, Z = 4, 3628 observed unique reflexions, R = 0.032. Lattice dim ensions at 19 °C: a = 891.54(6), b = 1277.26(6), c = 1277.66(7) pm, ß = 95.029(4)3. The com plex has a molecular structure in which the antimony atom is surrounded by three F-atom s with mean bond lengths o f 192.4 pm and by the five oxygen atom s o f the crown ether molecule with mean bond lengths o f 293.9 pm. 
  Reference    Z. Naturforsch. 45b, 1243—1250 (1990); eingegangen am 5. März/9. Mai 1990 
  Published    1990 
  Keywords    Syntheses, IR Spectra, 12lSb-M össbauer Spectra, Crystal Structure 
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 TEI-XML for    default:Reihe_B/45/ZNB-1990-45b-1243.pdf 
 Identifier    ZNB-1990-45b-1243 
 Volume    45 
5Author    Hans-W Alter, Swidersky, K. Urt DehnickeRequires cookie*
 Title      
 Abstract    [OsC14(C H 3C N)2] • 1/2C H 3CN has been pre­ pared by the reaction o f OsCl5 with acetonitrile in a slow reaction at room temperature, forming red, moisture sensitive crystals. The com pound was characterized by IR spectroscopy as well as by an X-ray structure determination. Space group Pnma, Z = 4, 1281 observed unique reflexions, R = 0.031. Lattice dimensions at 20 °C: a = 1032.5(5), b = 1356.0(7), c = 975.9(5) pm. The complex has a molecular structure, in which the osmium atom is octahedrally coordinated by four chlorine atoms and by two N -atom s o f the cis-coordinated acetonitrile molecules. The included C H 3C N m olecules are disordered in two posi­ tions. 
  Reference    Z. Naturforsch. 45b, 1210—1212 (1990); eingegangen am 26. Februar 1990 
  Published    1990 
  Keywords    Acetonitrile Solvate o f Osmium Tetrachloride, Synthesis, IR Spectra, Crystal Structure 
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 TEI-XML for    default:Reihe_B/45/ZNB-1990-45b-1210_n.pdf 
 Identifier    ZNB-1990-45b-1210_n 
 Volume    45 
6Author    W. Preetz, P. Hollmann, G. Thiele, H. HillebrechtRequires cookie*
 Title    Darstellung, Reaktionen und spektroskopische Charakterisierung von |O s2X8|2", X = Cl, Br, I, und Kristallstruktur von (P P N )2|O s2I8| * 2 CH2C12 Preparation, Reactions and Spectroscopic Characterization of [Os2X 8]2-, X = Cl, Br, I, and Crystal Structure o f (PPN )2[Os2I8] ■ 2 C H 2C12  
 Abstract    The triply bonded octahalogenodiosm ate(III) anions [Os2X 8]2-, previously known with X = Cl, Br, have now been extended to include the iodide with two staggered OsI4 units. This com ­ pound was prepared by treating [Os2Cl8]2' with N al at room temperature in acetone solu­ tion. The structure determination by X-ray diffractometry on single crystals o f (P P N)2[Os2I8] • 2 C H 2C12, reveals crystallization in the m onoclinic system, space group P 2 ,/c with Z = 4. The O s~O s triple bond is with 2.212(1) Ä the longest within the three octahalogenodiosm ates(III). The Raman spectra show v(OsOs) at 285, [Os2Cl8]2-; at 287, [Os2Br8]2_ and for the iodo compound at 270.1 cm ' 1 with up to three overtones. The spectro­ scopic constants are calculated to be a», = 270.9 cm -1; X u = -0 .5 0 cm "1. The 10 K UV-VIS spectra o f solid [(/7-C4H9)4N ]2[Os2X 8] exhibit ö~n* transitions with maxima at 723, 690 and 643 nm, superimposed by vibrational fine structures with long progressions o f 195, 211 and 183 cm -1 for X = Cl, Br, I, respectively. Oxidation o f [Os2X 8]2~, X = Cl, Br with the corresponding halogen leads to the cleavage o f the O s -O s bond, and the dekahalogenodiosm ates(IV), [Os2X l0]2-, are formed. 
  Reference    Z. Naturforsch. 45b, 1416—1424 (1990); eingegangen am 12. März 1990 
  Published    1990 
  Keywords    O ctaiododiosm ate(III), Synthesis, Crystal Structure, Raman, UV-VIS Spectra 
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 TEI-XML for    default:Reihe_B/45/ZNB-1990-45b-1416.pdf 
 Identifier    ZNB-1990-45b-1416 
 Volume    45 
7Author    M. Iinuma, T. Tanaka, M. Mizuno, E. WollenweberRequires cookie*
 Title    Unusual Flavanone from Encelia stenophylla  
 Abstract    A flavanone with 3'-OH as the sole B-ring substituent has been reported recently as a leaf and stem exudate constituent o f Encelia stenophylla. The correctness o f this unusual substitution is confirmed by synthesis o f this flavanone. 
  Reference    Z. Naturforsch. 45c, 135 (1990); received October 9 1989 
  Published    1990 
  Keywords    5, 7, 3'-Trihydroxy Flavanone, Unusual Substitution, Synthesis, Structure Confirmation 
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 TEI-XML for    default:Reihe_C/45/ZNC-1990-45c-0135_n.pdf 
 Identifier    ZNC-1990-45c-0135_n 
 Volume    45 
8Author    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