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1Author    Chrystel Hagen, Hanns-D Ieter AmbergerRequires cookie*
 Title    Zur Elektronenstruktur hochsymmetrischer Verbindungen der /-Elemente, XXV.III) Single Crystals for Chemical Syntheses and Physical Investigations  
 Abstract    Züchtung hochreiner Tris[bis(trimethylsilyl)amido]lanthanoid(III)-Einkristalle für chemische Synthesen und physikalische Untersuchungen The Electronic Structure o f Highly Symmetrical Compounds o f the /-Elem ents, XXV. Grow th of U ltrapure Tris[bis(trimethylsilyl)amido]lanthanide(Tris[bis(trimethylsilyl)amido]lanthanide(III 
  Reference    Z. Naturforsch. 48b, 1365—1371 (1993); eingegangen am 17. Juni 1993 
  Published    1993 
  Keywords    ) Complexes, Large Oriented Single Crystals, Optical Spectra, Vibrational Spectra 
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 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-1365.pdf 
 Identifier    ZNB-1993-48b-1365 
 Volume    48 
2Author    K. H. Pannell, L. J. BittmanRequires cookie*
 Title    Note Concerning Restricted Rotation about Metal-Acyl Carbon Bonds  
 Abstract    A recent article by LINDNER et al. reported some interesting data on new alkyl and acyl cobalt tricarbo-nylphosphine complexes, RCo (CO) 3P<Z>3 , R = CHF2, CH2F, CHF2CO, CH2FCO x . Of particular interest were the infrared spectral data of the carbonyl region which indicated the expected pseudo Csv symmetry for all the complexes and in addition reported the ketonic carbonyl band for the monofluoroacyl complex to be a doublet, the relative intensities of whose bands were temperature dependent. Such behavior is typical of the existence of rotational isomers and was explained on this basis, namely restricted rotation about the metal-acyl bond. It was proposed that such restricted rotation stemmed from the double bond character of the linkage due to contribution of the well established limiting structure A to the acyl-metal bond. 
  Reference    (Z. Naturforsch. 27b, 1109—1110 [1972]; received July 17 1972) 
  Published    1972 
  Keywords    Restricted rotation, Acyl-metal, Complexes 
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 TEI-XML for    default:Reihe_B/27/ZNB-1972-27b-1109_n.pdf 
 Identifier    ZNB-1972-27b-1109_n 
 Volume    27 
3Author    C.Requires cookie*
 Title    Die Einwirkung von Bromierungsmitteln auf Cyclopropenone  
 Abstract    yclopropenone C hem istry, V I Conversion of Cyclopropenones w ith B rom inating Agents S ig r id S. D e h m l o w u n d E c k e h a r d V. D e h m l o w Addition The synthesis of m ethyl-phenylcyclopropenone (la) is decribed. Bromination of this and of diphenylcyclopropenone yields saltlike complexes 2 which are in equilibrium with their components. Di-w-propylcyclopropenone and bromine give the ring opened product 3d. l a and N-bromosuccinimid give 4 and 5, phenyl brominated derivatives, in sulfuric acid. W ith cupric bromide substituted /S-bromoacrylic acids are formed along with cyclopropenone dimers (7). 
  Reference    (Z. Naturforsch. 30b, 404—408 [1975]; eingegangen am 26. November 1974) 
  Published    1975 
  Keywords    Complex, Ring Opening, Catalized Dimerization 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0404.pdf 
 Identifier    ZNB-1975-30b-0404 
 Volume    30 
4Author    G. S. Sodhi, J. KaurRequires cookie*
 Title    Thermogravimetric Studies on Bimetallic Dithiocarbamate Complexes+  
 Abstract    Thermogravimetric (TG) studies have been carried out for some bimetallic dithiocarbamate complexes o f the type ZnM L4 and N iM 'L 4 [M = Co(II), Cu(II); M' = Zn(II), Hg(II); L = N-methylcyclohexyldithiocarbamate; L' = N-ethylcyclohexyldithiocarbamate]. From TG curves, the order, apparent activation energy and apparent activation entropy for the thermal decomposition reaction have been calculated. The thermal stabilities have been correlated with the structures o f the complexes on the basis o f hard and soft acid base (H SA B) theory. 
  Reference    Z. Naturforsch. 47b, 1297—1299 (1992); received March 16 1992 
  Published    1992 
  Keywords    Thermogravimetry, Complexes, Activation Energy 
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 TEI-XML for    default:Reihe_B/47/ZNB-1992-47b-1297.pdf 
 Identifier    ZNB-1992-47b-1297 
 Volume    47 
5Author    CorneliusG. Kreiter, Wolfgang Michels, Gerhard HeebRequires cookie*
 Title    Photoreaktionen von Dekacarbonyldirhenium mit A llen und unverzweigten Allenderivaten Photoreactions of Decacarbonyldirhenium with Allene and Unbranched Derivatives o f Allene  
 Abstract    Decacarbonyldirhenium (1) reacts upon U V irradiation with allene (2), 1,2-butadiene (3) and 2,3-pentadiene (4) preferentially by CO substitution and oxidative rearrangement to the corresponding enneacarbonyl-//-?/1:3-endiyl-dirhenium complexes 5, 9, and 15 and to the octacarbonyl-,«-//-:2-allene-dirhenium complexes 6, the stereoisomers 10, 11, and 16. A t ele­ vated temperature 5, 9, and 15 loose CO and yield by a reductive rearrangement also the complexes 6, 10, 11, and 16. In addition to these main products, depending upon the allene derivative used, various by-products are obtained. By-products of the reaction o f 1 with 2 are octacarbonyl-M-/73:3-(2,3-dimethylene-buta-l,4-diyl)dirhenium (7) and ^-^^-allene-hexacarbonyl-/!-//1:3-i-propene-l,3-diyl-dirheniurn (8). The photo reaction of 1 with 3 yields, in addition to 9-11 , tetracarbonyl-^3-(£'-5-ethylidene-4-methyl-2-cyclopenten-l-yl)rhenium (12) 
  Reference    Z. Naturforsch. 50b, 649—660 (1995); eingegangen am 28. September 1994 
  Published    1995 
  Keywords    Decacarbonyldirhenium, Photoreaction, Allene, Derivatives, Complexes 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-0649.pdf 
 Identifier    ZNB-1995-50b-0649 
 Volume    50 
6Author    Requires cookie*
 Title    Darstellung und spektroskopische Eigenschaften von planaren Dipseudohalogeno-bis(phosphin)-platin(II)-Kom plexen1 Preparation and Spectroscopic Properties of Planar Dipseudohalogeno-bis(phosphine)-platinum(II) Complexes  
 Abstract    P e t e r H. K r e u t z e r , K a r l T. S c h o r p p u n d W o l f g a n g B e c k Diazido-bis(phosphine)-platinum(II 
  Reference    (Z. Naturforsch. 30b, 544—549 [1975]; eingegangen am 13. Mai 1975) 
  Published    1975 
  Keywords    ) Complexes, 14N NMR Spectra, Pseudohalogeno-bis(phosphine) Complexes, 31P NMR Spectra, IR Spectra 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0544.pdf 
 Identifier    ZNB-1975-30b-0544 
 Volume    30 
7Author    Requires cookie*
 Title    Reaktionen koordinierter Liganden, V1  
 Abstract    Reaktionen an funktionellen Gruppen von Azido-, Amino-und Hydrazidophosphinkomplexen des Typs cis-Mo(CO)4L2 Reactions of Coordinated Ligands, V 1 Reactions a t Functional Groups of Azido-, Amino-, and Hydrazidophosphine Complexes of the Type a\s-Mo(CO)4L 2 O t h m a r S t e l z e r *, H a n s -B e r n h a r d E i k m e i e r u n d G e r d J o h a n n s e n Azidophosphine The azidophosphine complexes cis-Mo(CO)4 (R2PN3)2 (R = Me, Ph) may be ob­ tained by nucleophilic displacement reactions of chlorine by azide ion in complexes cis-Mo(CO)4 (R2PCl)2-The thermal decomposition and Staudinger reactions were studied. Silylation of NH-or NH2-functional groups in aminophosphine and hydrazinophosphine complexes with MesSiCl, Me2SiCl2 or Me2SiCl-SiClMe2 leads to a series of monodentate or bidentate silylaminophosphine complexes, e.g. (CO)4Mo(R2PNHSiMe3)2, (CO)4Mo-(R2PNH)2SiMe2, (CO)4Mo(R2PNH)2(SiMe2)2, (CO)4Mo[R2PN(SiMe3)(SiMe3)NPR2] or (CO)4Mo[R2P-N(SiMe3)SiMe2-SiMe2-N(SiMe3)PR2]. The structures of these complexes are discussed on the basis of their IR and NMR spectra. 
  Reference    (Z. Naturforsch. 32b, 1449—1454 [1977]; eingegangen am 6. Juli 1977) 
  Published    1977 
  Keywords    Complexes, Staudinger Reaction, Silylation, Aminophosphine Complexes 
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 TEI-XML for    default:Reihe_B/32/ZNB-1977-32b-1449.pdf 
 Identifier    ZNB-1977-32b-1449 
 Volume    32 
8Author    H. Erbert, W. Roesky, Birgit Meller-Rehbein, M. Athias NoltemeyerRequires cookie*
 Title    Reactions of M e2NC(S)SN(SiMe3)2 with M etal Halides -Crystal Structure of M e2NCS2ZrCl3 * 3 Pyridine  
 Abstract    M e-,NC(S)SN(SiM e3)2 (1) reacts with TeCl4 and N bC lj to yield M e2N C (S)SN TeC l2 (4) and 
  Reference    Z. Naturforsch. 46b, 1117—1121 (1991); eingegangen am 14. Februar 1991 
  Published    1991 
  Keywords    Tellurium, Niobium, Zirconium, Hafnium, Complexes, X-Ray 
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 TEI-XML for    default:Reihe_B/46/ZNB-1991-46b-1117_n.pdf 
 Identifier    ZNB-1991-46b-1117_n 
 Volume    46 
9Author    DavidJ. Brauer, Jörg Fischer, Stefan Kucken, KlausP. Langhans, O. Thm, Ar Stelzer, Norbert WeferlingRequires cookie*
 Title    Wasserlösliche Phosphane, III [1] Wasserlösliche primäre Phosphane mit Ammoniumgruppierungen NR2R' in der Seitenkette -donorfunktionalisierte Amphiphile Water-Soluble Phosphanes, III [1] Water-Soluble Primary Phosphanes with Ammonium Groups NR2R' in the Side Chain -Donor-Functionalized Amphiphiles  
 Abstract    Primary and secondary aminoalkylphosphanes R2N -(C H 2)" ,-P H 2 (R 2 = Me2, «Bu2, C5H 10, C4H 80 , 2-(l-Methyl-2-pyrrolidinyl); m = 2, 3, 6, 10, 11; 1 -6) or [R2N -(C H 2)m]2PH (7, R2 = C5H 10; m = 2) are accessible by aminoalkylation of PH 3 with tö-chloroalkylamines R2N -(C H 2)m-C l in the superbasic medium DM SO/KOH (DM SO = dimethylsulfoxide). By selective N-quaternization of 1, 2, 4 -6 with RT (R ' = Me, C"H2" + 1; n = 6 -8 , 12, 16, 18) in the two-phase system CH2C12/H 20 novel primary phosphanes [R 'R 2N -(C H 2)m-P H 2]+I~ (ll-1 6 f) with quaternary ammonium groups in the alkyl side chain are obtained. The water solubility of l l -1 6 f decreases with increasing chain length (n) of R'. 11 (R = R' = Me; m = 2) shows a trans conformation at the C2H 4 bridge according to an X-ray structural analysis. Protonation of 1, 2, 4, 5 with HC1 affords the water-soluble hydrochlorides [HR2N -(C H 2)" ,-P H 2]+C1~ (19-22). The cationic primary phosphanes l l -1 6 f are stable towards oxygen. By oxidation of 11 with one or two equivalents of H 20 2 the primary phos­ phane oxide [Me3N -(C H 2)2-P (0) H 2]+I~ (23) or the phosphonous acid [Me3N -(C H 2)2-P (0)(0 H)H ]+I~ (23aj are formed. Hofmann degradation of 11 or 16c with KOH yields phosphirane in good yields. Reaction of 1, 2, 4 -6 (L) with Fe2(CO)9 at ambient temperature yields stable complexes (CO)4FeL (26-30). U nder more rigorous conditions Fe3 clusters (31, 32) with free R2N groups are obtained. 
  Reference    Z. Naturforsch. 49b, 1511—1524 (1994); eingegangen am 16. Mai 1994 
  Published    1994 
  Keywords    Aminoalkylphosphanes, Protonation, Water Solubility, Complexes, Clusters 
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 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-1511.pdf 
 Identifier    ZNB-1994-49b-1511 
 Volume    49 
10Author    Joachim Heinickea, Attila Dala, Hans-Friedrich Kleinb, Olaf Hetcheb, Ulrich Flörkec, Hans-Jürgen HauptcRequires cookie*
 Title    Formation of r71-P-(2-Phosphinophenol)Ni(0)(PMe3)3 and Oxidation to cjs/fraws-Bis(2-phosphinophenolato)nickel(II) Complexes  
 Abstract    o-Phosphinophenols 1 (P ^ O H) react with equimolar amounts of Ni(PMe3)4 at low tempera­ tures to give yellow Ni(0) complexes such as [(HO~P)Ni(PMe3)3] 2a with only P coordination of the P ^ O H ligand. Oxidation of solutions of 1 and Ni(PMe3)4 by dioxygen leads to brown bis(o-phosphinophenolato-P^O)nickel chelate complexes 3a-d. Structure elucidation by NM R is consistent with a m-square planar geometry for 3a-c and a rrans-square planar solution struc­ ture of the terr-butylphenylphosphino derivative 3d. The geometric isomers were distinguished by different ranges of phosphorus coordination shifts and 3lP-l3C-2 and 3IP-13C-1 coupling 
  Reference    Z. Naturforsch. 54b, 1235—1243 (1999); received May 19 1999 
  Published    1999 
  Keywords    Phosphinophenolate, Nickel, Complexes, Structure Elucidation, Solid State Structures 
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 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-1235.pdf 
 Identifier    ZNB-1999-54b-1235 
 Volume    54 
11Author    Jürgen PolsterRequires cookie*
 Title    Ein neues Verfahren zur spektrometrischen Analyse von Metallkomplex-Lösungen A New Method for Spectrometric Analysis of Complex Metal Solutions  
 Abstract    A new simple method is given to analyse potentiometrically titrated and spectrophoto-metrically measured complex-solutions of the system AH ^ A -j-H3Ü+ and n • A + M^MA n . The absorbance coefficients of the metal complex MA n and the stability constants can be determined for each titration step by construction of the "extinction triangle" in the (two-dimensional) absorbance (E) diagram. It is not necessary to know the absolute pH value of the solution. The titration of 2-nitroso-l-naphthol-4-sulfonic acid/zinc sulfate in water is shown as an example. 
  Reference    (Z. Naturforsch. 31b, 1621—1625 [1976]; eingegangen am 15. September 1976) 
  Published    1976 
  Keywords    Spectrophotometry Titrations, Absorbance Diagrams, Complex, Stability Constants, Absorbance Coefficients 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-1621.pdf 
 Identifier    ZNB-1976-31b-1621 
 Volume    31 
12Author    H. S. Sangari, G. S. Sodhi, N. K. Kaushik, R. P. SinghRequires cookie*
 Title    Bis(?? 5 -cyclopentacüenyl)N,N-Disiibstituted Dithiocarbamato(cUoro)oxomolybdeniim(VI) Complexes  
 Abstract    Bis(?j 5 -cyclopentadienyl)N,N-disubstituted Dithiocarbamato(chloro)oxomolybdenum(VI) complexes of the type (C5H5)2MoO(S2CNR2)C1 and (CsHshMoO^CNRR'JCl where R = Me, Et, «'-Pr and R' = cyclohexyl (cyhx) have been prepared by the reaction of stoichio- metric amounts of bis(^5-cyclopentadienyl)oxomolybdenum(VI) dichloride with sodium dichio-thiocarbamates in refluxing dichloromethane. Infrared spectral studies demonstrate that in these complexes, the dithiocarbamate ligands are bidentate. Hence a coordination number of 7 may be assigned to the molybdenum(VI) atom in each case. In addition to infrared studies, electronic spectra, NMR studies, magnetic susceptibility, elemental analyses and conductance measurements have been carried out for these complexes. 
  Reference    Z. Naturforsch. 35b, 1254—1256 (1980); received May 9 1980 
  Published    1980 
  Keywords    Complexes, Electrical Conductance, Magnetic Susceptibility, Electronic Spectra, NMR Spectra 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-1254.pdf 
 Identifier    ZNB-1980-35b-1254 
 Volume    35