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1Author    Requires cookie*
 Title    Übergangsmetall-Antimon(HI)bromide  
 Abstract    T ransition M etal-A n tim on y(III) Brom ides W o l f g a n g M a l i s c h und P e t e r P a n s t e r In stitu t Antim The reaction of SbBr3 with the complex metal carbonyl anions [jz-C5H 5(CO)3M]Na (M = Mo, W) leads to the formation of transition metal antimony bromides 7r-C5H 5(CO)3M -SbBr2, which can be further metallated, yielding the stable species jr-C5H 5(CO)3M -Sb-M / (CO)n7t-C5H 5 (M = M' = Mo, W) 
  Reference    (Z. Naturforsch. 30b, 229—234 [1975]; eingegangen am 16. Dezember 1974) 
  Published    1975 
  Keywords    ony-transition Metal Compounds, Synthesis, Coordination, Oxidation 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0229.pdf 
 Identifier    ZNB-1975-30b-0229 
 Volume    30 
2Author    Bernd Grande, Hanskarl Müller-BuschbaumRequires cookie*
 Title    Über Oxocuprate, XIV Zur Kristallchemie von Sr2Cu304Cl2 On Oxocuprate, XIV On the Crystal Chemistry of Sr2Cu304Cl2  
 Abstract    The new compound Sr2Cu304Cl2 was prepared in melts of SrCl2. A single crystal X-ray examination (a = 546.2, c= 1259.1 pm, space group D^-14/mmm) shows that the octahedral distortion of the [Cu304Cl2] 4 ~-network cannot be explained only by the JAHN-TELLER effect. 
  Reference    (Z. Naturforsch. 31b, 405—407 [1976]; eingegangen am 24. November 1975) 
  Published    1976 
  Keywords    Strontium, Copper, Oxide Chloride, Crystal Structure, Coordination 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-0405.pdf 
 Identifier    ZNB-1976-31b-0405 
 Volume    31 
3Author    Oliver Heilmann, Hans-Dieter Hausen, Wolfgang KaimRequires cookie*
 Abstract    The crystal structure determination of the new rhodium(III)-complex [(DM L)(C5Me5)ClRh](PF6). DML = 1,3-dimethyllumazine, reveals 0 4,N5 coordination of the metal to DML with not very different bond lengths of 213.0(2) pm (R h -N) and 219.2(2) pm (R h -O). This result stands in contrast to the previously reported structure of a cationic dihydrobiopterin bound to [Mo(0)C13] which exhibited a very unsymmetrical chelate ar­ rangement. Chemical and electrochemical two-electron reduction of the Rh(III) complex led to a very labile Rh(I) species (DM L)(C5Me5)Rh which is distinguished by an intense charge transfer band in the visible. The results confirm the characterization of DML as a weak o donor In acceptor ligand with a rather low-lying tc* orbital. 
  Reference    Z. Naturforsch. 49b, 1554—1560 (1994); received July 8 1994 
  Published    1994 
  Keywords    Crystal Structure, Pteridine Heterocycles, Rhodium, Electrochemistry, Coordination 
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 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-1554.pdf 
 Identifier    ZNB-1994-49b-1554 
 Volume    49 
4Author    F. Ucun, F. KöksalRequires cookie*
 Title    An EPR Study on V0 2+ and Mn 2+ Ions in Some Zeolites  
 Abstract    The electron paramagnetic resonance (EPR) of hydrated V0S0 4 -3H 2 0 and MnCl 2 -2H 2 0, adsorbed on the synthetic zeolites 3A, 4A, 5A and 13X of pore diameters 0.3, 0.4, 0.5, and 1.0 nm, respectively, and the natural zeolites heulandite and clinoptilolite was investigated. The spectra indicated that the coordination structures are V0(H 2 0)5 + and Mn(H 2 0)g + , and that their EPR line widths vary with the pore diameters and the surface areas of the zeolites. The spectra of V0(H 2 0)5 + in natural zeolites at room temperature display an isotropic behavior and therefore indicate that the water ligands are mobile. The EPR spin Hamiltonian parameters, the molecule orbital constant ß* 2 , and the Fermi contact term K e[[ were determined and are discussed. The spectra of Mn(H 2 0)^ for narrow-pore zeolites indicate the existence of mobile and immobile water, whereas for wide-pore and natural zeolites they indicated the existence of only mobile water. The obtained Mn(H 2 Ö)g + spectra are discussed. 
  Reference    Z. Naturforsch. 51a, 23—26 (1996); received October 17 1995 
  Published    1996 
  Keywords    EPR, V0 2 +, Mn 2 +, Zeolites, Coordination 
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 TEI-XML for    default:Reihe_A/51/ZNA-1996-51a-0023.pdf 
 Identifier    ZNA-1996-51a-0023 
 Volume    51 
5Author    Akiko Kondoh, Takao OiRequires cookie*
 Title    Interaction of Alkaline Earth Metal Ions with Carboxylic Acids in Aqueous Solutions studied by 13 C NMR Spectroscopy  
 Abstract    1? C NMR spectroscopic measurements of aqueous solutions containing alkaline earth metal chloride and a carboxylic acid have been carried out to acquire some insight into the coordination manners of various carboxylic acids to alkaline earth metal ions. The dependence of the l 3 C NMR signal positions of the carboxylate carbons on the magnesium ion concentration in a magnesium carboxylate system is a good index to understand the coordination manner of the carboxylate ion. The upfield shift of the car-boxylate carbon signal with increasing magnesium ion concentration indicates that the carboxylate ion acts as a bidentate ligand to form a ring structure. Only in the citrate systems, the existence of a rela-tively stable complex is evidenced in which the citrate ion is expected to act as a tridentate ligand. 
  Reference    Z. Naturforsch. 53a, 77—91 (1998); received December 30 1997 
  Published    1998 
  Keywords    13 C NMR Spectroscopy, Carboxylic Acids, Alkaline Earth Metals, Coordination, Chemical Shifts 
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 TEI-XML for    default:Reihe_A/53/ZNA-1998-53a-0077.pdf 
 Identifier    ZNA-1998-53a-0077 
 Volume    53