| 1 | Author
| Dieter Rehder, Hans-Christoph Bechthold, Ahmet Keçeci, Hartwig Schmidt, Michael Siewing | Requires cookie* | | Title
| A Comparative Study of Metal Shielding in Low Valent Vanadium, Niobium and Manganese Complexes  | | | Abstract
| Variations of the metal chemical shifts <5(51 V), <5(55 Mn) and <S(93 Nb) with the para-magnetic deshielding contribution to the overall shielding are discussed in terms of influences imposed by the ligand field splitting, the nephelauxetic effect and the covalency of the metal-to-ligand bond. Complexes under investigation are isoelectronic and/or iso-structural series [M(CO)6_nL"]<i (M = V, Nb: q = —1; M = Mn: q = + 1; n = 0-6), 7? 5 -C5H5M(CO)4-KLn (M = V, Nb; n = 0-4) and r? 5 -C5H5M(L /)2L (M = V, L' = NO; M = Mn, L' = CO). L is a monodentate or l/n oligodentate phosphine. <5 varies with the point symmetry of the complex, and with ligand parameters of primarily electronic or steric origin. Generally, for weak to medium ^-interaction, there is a decrease of shielding with decreasing yr-acceptor power of the ligand, increasing ligand bulkiness, increasing ring strains in chelate structures and increasing degree of substitution. For strong ^-inter-action, the trends may be interconverted. PF3 is shown to be a slightly weaker 7r-acceptor than CO. Selected results on nuclear-spin spin coupling constants, 13 C and 31 P shielding are also presented. | | |
Reference
| Z. Naturforsch. 37b, 631—645 (1982); eingegangen am 25. November 1981 | | |
Published
| 1982 | | |
Keywords
| Carbonylphosphinevanadium, Carbonylphosphineniobium, Carbonylphosphinemanganese, NMR Spectra | | |
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| default:Reihe_B/37/ZNB-1982-37b-0631.pdf | | | Identifier
| ZNB-1982-37b-0631 | | | Volume
| 37 | |
2 | Author
| Wolf-Walther Du Mont, Mario Grenz | Requires cookie* | | Title
| Bis(trimethylsiloxy)tin(II): A Heterosiloxane as Soft Ligand  | | | Abstract
| Contrary to earlier reports the reaction of sodium trimethylsilanolate with stannous chlo-ride does not yield bis(trimethylsiloxy)tin(II) (1) but a polynuclear compound of the type Sn20(0SiMe3)2 (2). 1 is obtained from the reac-tion of stannocene with trimethylsilanole. The compound is a dimer that gives rapid exchange reactions of terminal and bridging trimethylsil-oxy groups in inert organic solvents. | | |
Reference
| (Z. Naturforsch. 38b, 113—114 [1983]; eingegangen am 10. September 1982) | | |
Published
| 1983 | | |
Keywords
| Oxastannylenes, Heterosiloxanes, NMR Spectra | | |
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| default:Reihe_B/38/ZNB-1983-38b-0113_n.pdf | | | Identifier
| ZNB-1983-38b-0113_n | | | Volume
| 38 | |
4 | Author
| ReinerM. Artens++, W. Olf-W, Alther, M. Ont, Lutz Lange | Requires cookie* | | Title
| Trichlorsilylierung sperriger Dialkylchlorphosphane und Tetraalkyldiphosphane mit HexachlordisiIan+ Trichlorosilylation of Bulky Dialkylchlorophosphanes and Tetraalkyldiphosphanes with Hexachlorodisilane  | | | Abstract
| Chlorodiisopropylphosphane reacts with hexachlorodisilane to give diisopropyl(tri-chlorosilyl)phosphane which reacts with the educt chlorophosphane to produce tetraisopro-pyldiphosphanc. Tetraisopropyldiphosphane reacts with hexachlorodisilane to provide diiso-propyl(trichlorosilyl)phosphane. With di-/m-butylchlorophosphane and tetra-/e/7-butyldi-phosphane, the corresponding reactions leading to dW£>/7-butyl(trichlorosilyl)phosphane are much slower; while the product does not react further with di-/e/7-butylchlorophosphane, it does with chlorodiisopropylphosphane. A stable 1 : 1 complex is formed from di-tert-butyl(trichlorosilylphosphane) with silver bromide. Products are characterized on the basis of analytical and 'H, l3C, 29Si and 3IP NMR data. | | |
Reference
| Z. Naturforsch. 46b, 1609—1612 (1991); eingegangen am 3. Juli 1991 | | |
Published
| 1991 | | |
Keywords
| Trichlorosilylation, Chlorophosphanes Silylphosphanes, NMR Spectra | | |
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| default:Reihe_B/46/ZNB-1991-46b-1609.pdf | | | Identifier
| ZNB-1991-46b-1609 | | | Volume
| 46 | |
5 | Author
| Jörn Müller, PetraEscarpa Gaede, Ke Qiao | Requires cookie* | | Title
| ^-Olefin-Iridium-Komplexe, XXII [1] C -H -Aktivierung von aromatischen und aliphatischen Solvensmolekülen RH bei der Reaktion von [Cp*IrCI2 ] 2 mit Butadienmagnesium unter Bildung von [Cp*Ir(773-C4H 7)R] sowie Kristallstruktur von [Cp*Ir(i/3-C4H 7)C6H 5] jr-Olefin Iridium Complexes, XXII [1] C -H Activation of Aromatic and Aliphatic Solvent Molecules RH in the Reaction of [Cp*IrCl2 ] 2 with Butadienemagnesium with Formation of [Cp*Ir(?;3 -C4 H 7 )R], and Crystal Structure of [Cp*Ir(773 -C4 H 7 )C6 H 5] Activation of C -H , (l-Methylallyl)(pentamethylcyclopentadienyl)iridium-a-organyl Com plexes  | | | Abstract
| Reactions of [Cp*IrCl2]2 (Cp* = ^3-C5M e5) with [MgC4H6 -2 THF]" at low temperature give [Cp*Ir(^4-C4H6)] together with [Cp*Ir(/73-C4H 7)R] compounds, the latter being formed via C -H activation of solvent molecules RH (RH = benzene, toluene, anisole, thiophene, furane, N-methylpyrrole, pentane, cyclohexane. THF). In the case of pyrrole, C -N -activation occurs. The ratio of syn and anti isomers of the 1-methylallyl com plexes as well as the sites o f C -H activation of RH were investigated by NM R spectrometry. An enantiomorphous crystal of [Cp*Ir(773-C4H7)C6Hs] was characterized by X-ray diffraction analysis which reveals trigonal planar coordination at the Ir atom and an exo, syn conformation o f the 1-methylallyl ligand. A mechanism of the reaction which involves 16-electron intermediates is discussed. The corresponding system [Cp*RhCl2]2/butadienemagnesium/RH gives only [Cp*Rh(>/4-C4H6)], and no C -H activation is observed. | | |
Reference
| Z. Naturforsch. 49b, 1645—1653 (1994) | | |
Published
| 1994 | | |
Keywords
| Synthesis, NMR Spectra, Crystal Structure | | |
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| default:Reihe_B/49/ZNB-1994-49b-1645.pdf | | | Identifier
| ZNB-1994-49b-1645 | | | Volume
| 49 | |
6 | Author
| Ekkehard Lindner, Günter Von Au | Requires cookie* | | Title
| Darstellung und Eigenschaften von und Reaktionen mit metallhaltigen Heterocyclen, VII [1] Heterolytische Spaltung der Re-Re-Bindung in den Zweikern-Anionen [(OC)4ReP(R2 )0] 2 2 ~ mit Elektrophilen - ein Weg zu Heterocyclen mit Re-C-o-Bindung Preparation and Properties of, and Reactions with, Metal-Containing Heterocycles, VII [1] Heterolytic Cleavage of the Re-Re Bond in the Binuclear Anions [(0C)4ReP(R2)0]2 2_ with Electrophiles -a Pathway to Heterocycles with Re-C a Bonds  | | | Abstract
| The preparation of the six-membered rhenacyclohexanes (OC)4ReP(R2)OCH2C(CH3)2CH2 (la, b) [R = CH3 (a), C6H5 (b)J is accomplished by heterolytic cleavage of the Re-Re bond in the binuclear anions [(0C)4ReP(R2)0]2 2 -with strong electrophiles like the alkane-diylbis(triflate) (CH3)2C(CH2Y)2 (Y= OSO2CF3), followed by an attack of the a>-positioned carbenium-like C atom on the phosphinite oxygen of the anion. 1 a, b insert SO2 under ring I I | | |
Reference
| Z. Naturforsch. 35b, 1104—1110 (1980); eingegangen am 9. Mai 1980 | | |
Published
| 1980 | | |
Keywords
| Rhenacyclohexanes, Mechanism, S02-Insertio", X-ray, IR spectra, NMR spectra : | | |
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| default:Reihe_B/35/ZNB-1980-35b-1104.pdf | | | Identifier
| ZNB-1980-35b-1104 | | | Volume
| 35 | |
7 | Author
| Trimethylsilyl Tetrafluorotellurates, Vi, Benno Bildstein, Walter Tötsch, Fritz Sladky, E-F=. Me, E-R | Requires cookie* | | Title
| Trimethylsüyl-tetrafluorotellurate(VI)  | | | Abstract
| The interaction of MesSiCl with eis-and trans-(HO)2TeF 4 and eis-and £ran.s-HOTeF 4 OCH 3 yields eis-and trans-(Me3SiO)2TeF 4 and eis-and <rans-Me3SiOTeF 4 OCH3, respectively, which have been characterized by NMR spectroscopy (125 Te, 29 Si, 19 F, X H). Die Trimethylsilylgruppe ist eine häufig verwen-dete Abgangsgruppe in Reaktionen mit Fluoriden: | | |
Reference
| Z. Naturforsch. 36b, 1542—1543 (1981); eingegangen am 22. Juli 1981 | | |
Published
| 1981 | | |
Keywords
| Synthesis, Trimethylsilyl Tetrafluorotellurates(VI), NMR Spectra | | |
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| default:Reihe_B/36/ZNB-1981-36b-1542.pdf | | | Identifier
| ZNB-1981-36b-1542 | | | Volume
| 36 | |
8 | Author
| Edgar Niecke, Anke Nickloweit-Lüke, Reinhold Rüger, Bernt Krebs, Helmut Grewe | Requires cookie* | | Title
| .2A 3 .3A 3 -Azadiphosphiridine -Synthese, Kristallstruktur und Eigenschaften 1,2 A 3 ,3 x 3 -Azadiphosphiridines -Synthesis, Crystal Structure and Proj)erties  | | | Abstract
| 1,2 A 3 ,3 A 3 -Azadiphosphiridines are avaüable by elimination of hydrogenhalide from ß-and y-functional molecular frameworks and by 1 + 2 cycloaddition of phosphinidenes towards aminoiminophosphanes. In contrast to other three-membered phosphorus com-pounds, azadiphosphiridines decompose by 2 +1 cycloreversion to aminoiminophosphanes and phosphinidenes. The molecular structure of an azadiphosphiridine demonstrates the trans arrangement of the exocyclic ligands and the planarity of the endocyclic nitrogen. | | |
Reference
| Z. Naturforsch. 36b, 1566—1574 (1981); eingegangen am 13. Juli 1981 | | |
Published
| 1981 | | |
Keywords
| Azadiphosphiridines, Cyclisation, Thermal Decomposition, NMR Spectra, Crystal Structure | | |
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| default:Reihe_B/36/ZNB-1981-36b-1566.pdf | | | Identifier
| ZNB-1981-36b-1566 | | | Volume
| 36 | |
9 | Author
| OttoJ. Scherer, Heribert Jungmann | Requires cookie* | | Title
| Phosphor-Ylid-Komplexe des Platins Phosphorus Ylide Complexes of Platinum  | | | Abstract
| The interaction of eis/trans-[Pt(PPI13) 2 (CH2CI)Cl] (1) with Ph 3 P gives the ylide complex cis-[Pt(PPh 3) 2 (CH 2 PPh 3)Cl]Cl (2), which forms cis-[Pt(PPh 3)(CH 2 PPh 3)Cl 2 ] (3) on heating in benzene. In CH 2 C1 2 , Ph 3 P is added again quanti-tatively with formation of 2. Irradiation of 3 with a 500 W lamp yields cw-Cl 2 Pt(PPh 3) 2 . The ylide complexes 4 and 6 were prepared by treatment of 3 with (Me2N) 3 P or Ph 3 As. 3 and Ph 2 P(CH 2) 2 PPh 2 form the chelate ylide com-plex 6. | | |
Reference
| Z. Naturforsch. 36b, 1663—1665 (1981); eingegangen am 26. August 1981 | | |
Published
| 1981 | | |
Keywords
| Phosphorus Ylide Complexes, Synthesis, NMR Spectra | | |
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| default:Reihe_B/36/ZNB-1981-36b-1663_n.pdf | | | Identifier
| ZNB-1981-36b-1663_n | | | Volume
| 36 | |
10 | Author
| Fritz Preuss, Lothar Ogger | Requires cookie* | | Title
| Alkylvanadium( V) -Verbindungen Darstellung und NMR-spektroskopische Untersuchungen Alkylvanadium(V) Compounds S\ T nthesis and NMR Spectroscopic Studies  | | | Abstract
| The compounds Li["C4H9V0(0«C4H9)3], Me3SiCH2V(0<C4H9)3, (CH3)2V(OSiMe3)2 and V(0'C4Hg)4 have been prepared by reaction of esters VO(OR)3(R = J C4H9, SiMes) with lithium alkyls. RV0(0'C4H9)2 species are not formed by direct alkylation of VO(O f C4H 9)3 with LiR; albeit in small yields, these compounds (R = CH3, CH 2 SiMe3) can be synthesized however from V0(0«C4H9)2C1. The 51 V, and 13 C NMR spectra of the vanadium(V) and vanadium(IV) compounds are discussed; the constants of 51 V, iH and 51 V, 13 C coupling have been determined. | | |
Reference
| Z. Naturforsch. 37b, 957—964 (1982); eingegangen am 15. Februar 1982 | | |
Published
| 1982 | | |
Keywords
| Alkylvanadium(V) Compounds, Preparation, NMR Spectra | | |
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| default:Reihe_B/37/ZNB-1982-37b-0957.pdf | | | Identifier
| ZNB-1982-37b-0957 | | | Volume
| 37 | |
12 | Author
| Barteld De Ruiter, Geert Kuipers, JanH. Bijlaart, JohanC. Van De Grampel | Requires cookie* | | Title
| Derivatives of NPC12(NS0C1)2 and (NPC12)2NS0C1, Part XX [1] Reactions of Some Inorganic Ring Systems with N,N' -Dimethylethylenediamine  | | | Abstract
| Reactions of the ring systems (NPC12)3, (NPCl2)2NSOX, and NPC12(NS0X)2 (X = Cl, Ph) with N,N'-dimethylethylenediamine lead to mono-, bis-, and tris(spirocyclic) com-pounds as the only characterizable products. The X H and 31 P NMR parameters are re-ported and briefly discussed. | | |
Reference
| Z. Naturforsch. 37b, 1425—1429 (1982); received June 18 1982 | | |
Published
| 1982 | | |
Keywords
| Phosphorus-Sulfur-Nitrogen Heterocycles, Diazaphospholidines, NMR Spectra | | |
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| default:Reihe_B/37/ZNB-1982-37b-1425.pdf | | | Identifier
| ZNB-1982-37b-1425 | | | Volume
| 37 | |
14 | Author
| Jörn Müller, Wolfgang Hähnlein, Barbara Passon | Requires cookie* | | Title
| TT-Olefin-Iridium-Komplexe, IX [1] Bis(?y 4 -butadien)-(7-organyl-iridium-Verbindungen TI-Olefin Iridium Complexes, IX [1] Bis(fy 4 -butadiene)-cr-organyl-iridium Compounds  | | | Abstract
| Complexes of the type [L2IrR] (L = butadiene, isoprene, piperylene, 1,4-and 2,3-dimethylbutadiene; R = CH3, CeHs) have been synthesized by reactions of [L2IrCl] with LiR in hexane. With L = 2,3-dimethylbutadiene, [L2IrR] compounds with higher alkyl groups R (e.g. n-C3H7, n-CjHg) can be obtained which for steric reasons are inert against ^-elimination. Th© system [L2IrCl]/L/LiAlH4 (L = 2,3-dimethylbutadiene) yields [L2IrR] with R = 2,3-dimethylbutene-2-yl. The complexes were characterized by NMR and mass spectra. | | |
Reference
| Z. Naturforsch. 37b, 1573—1579 (1982); eingegangen am 8. Juli 1982 | | |
Published
| 1982 | | |
Keywords
| Synthesis, Mass Spectra, NMR Spectra, yr-Olefm Iridium Complexes | | |
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| default:Reihe_B/37/ZNB-1982-37b-1573.pdf | | | Identifier
| ZNB-1982-37b-1573 | | | Volume
| 37 | |
16 | Author
| Dieter Weber, Karl Peters, Hans Georg, Schnering, Ekkehard Fluck | Requires cookie* | | Title
| Kristallstruktur yon Pyrrolidinium-bis(diisopropylphosphinoyl)phosphid, einem System mit zweifach koordiniertem Phosphor Crystal Structure of Pyrrolidinium-bis(diisopropylphosphinoyl)phosphide, a System with Bicoordinated Phosphorus  | | | Abstract
| Pyrrolidinium-bis(diisopropylphosphinoyl)phosphide crystallizes triclinically in the space group Pi with a = 1019.6(8), b = 1271.5(4), c = 999.5(7) pm, a = 100.90(5)°, ß = 91.24(5)°, y = 99.10(5)° and Z = 2 formula units. The mean P-P bond length is 212.2 pm and hence shorter than in derivates in which the electron pairs of the bicoordi-nated phosphorus atom are bonded to one or two M(CO)5-groups. Additional p.-z-d* bonding explains the shortening of the P-P bond. | | |
Reference
| Z. Naturforsch. 38b, 208—211 (1983); eingegangen am 13. Oktober 1982 | | |
Published
| 1983 | | |
Keywords
| Pyrrolidinium-bis(diisopropylphosphinoyl)phosphide, Crystal Structure, NMR Spectra | | |
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| default:Reihe_B/38/ZNB-1983-38b-0208.pdf | | | Identifier
| ZNB-1983-38b-0208 | | | Volume
| 38 | |
17 | Author
| K. Barlos, Heinrich Nöth | Requires cookie* | | Title
| Beiträge zur Chemie des Bors, CVIII [1] Synthese und Konformation yon N.N'-Bis(boryl)-N.N'-dimethylhydrazinen Contributions to the Chemistry of Boron, CVIII [1] Synthesis and Conformation of N,N , -Bis(boryl)-N,N'-dimethylhydrazines N,N'-Bis(methylboryl)-N,N'-dimethyl-hydrazine, N,N'-Bis(dichlor-boryl)-N,N  | | |
Reference
| (Z. Naturforsch. 35b, 125—132 [1980]; eingegangen am 10. August 1979) | | |
Published
| 1980 | | |
Keywords
| -dimethyl-hydrazine, Conformation, NMR Spectra, PE Spectra | | |
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| default:Reihe_B/35/ZNB-1980-35b-0125.pdf | | | Identifier
| ZNB-1980-35b-0125 | | | Volume
| 35 | |
19 | Author
| Herbert Schumann, Manfred Meissner | Requires cookie* | | Title
| Organometallphosphin-substituierte Übergangsmetallkomplexe, XXVI [1] Diearbonyl-nitrosyl-organometaUphosphin-kobalt-Komplexe Organometalphosphine-Substituted Transition Metal Complexes, XXVI [1] Dicarbonyl Nitrosjd Organometal Phosphine Cobalt Complexes  | | | Abstract
| The reactions of tricarbonyl nitrosyl cobalt with tri-feri-butylphosphine, di(teri-butyl)-trimethylsilyl-, -germyl-, -stannylphosphine, £er£-butyl-bis(trimethylsilyl)-, -(germyl)-, -(stannyl)phosphine, as well as with tris(trimethylsilyl)-, -(germyl)-, and -(stannyl-phosphine result in the elimination of one CO-ligand and the formation of corresponding dicarbonyl-nitrosyl-organometal phosphine cobalt complexes. The NMR spectra of the products are reported and discussed. | | |
Reference
| Z. Naturforsch. 35b, 594—598 (1980); eingegangen am 5. Dezember 1979 | | |
Published
| 1980 | | |
Keywords
| Organometal Phosphines, Dicarbonyl-nitrosyl Cobalt Complexes, NMR Spectra | | |
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| default:Reihe_B/35/ZNB-1980-35b-0594.pdf | | | Identifier
| ZNB-1980-35b-0594 | | | Volume
| 35 | |
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