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'Clusters' in keywords Facet   Publication Year 1992  [X]
Facet   section ZfN Section B  [X]
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1992[X]
1Author    N. B. Mikheev3, A. N. Kam, A. Rum, V. L. Novitschenko3, A. Simon, HjM. AttauschbRequires cookie*
 Title    Electrochemical Cocrystallization Experiments with Gd2Cl3  
 Abstract    G d2Cl3 is electrocrystallized from molten G dC l3 at 900 K with a current efficiency o f 70% referring to the reaction 2G d C l3 + 3 e -= G d2Cl3 + 3 C l-. The reaction is used to determine co­ crystallization coefficients for trivalent rare earths and actinoids (Y, Nd, Cm, Pu), divalent lanthanoids (Eu, Yb), and Sr. The oxidation potential for the above reaction is determined as 2.65 < E ° < 2.68 V. 
  Reference    Z. Naturforsch. 47b, 992—9 (1992); eingegangen am 17. Januar 1992 
  Published    1992 
  Keywords    Cluster, Electrochemical Reduction, Cocrystallization 
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 TEI-XML for    default:Reihe_B/47/ZNB-1992-47b-0992.pdf 
 Identifier    ZNB-1992-47b-0992 
 Volume    47 
2Author    DavidJ. Brauer, F. Rank, D. Örrenbach, Jörg Fischer, O. Thm, Ar StelzerRequires cookie*
 Title    Synthese von Phosphaalkenclustern durch reduktive Phosphinidenfragmentierung zweizähniger Halogenphosphane R X P -C H 2-P X R mit Fe2(CO) 9 Synthesis of Phosphaalkene Clusters by Reductive Phosphinidene Fragm entation of Bidentate Halogenphosphines R X P -C H 2-P X R with Fe2(CO)9 F rank Bitterer  
 Abstract    Reaction o f halogen functional m ethylenebisphosphines 1 X R P -C H 2-P R X (X = CI, Br) with excess Fe2(CO)9 affords /^-phosphinidene clusters (5) containing phosphaalkene ligands R -P = C H 2. The fragmentation o f the P -C -P skeletons in 1 proceeds stepwise, phosphido complexes 2 and novel Fe3 clusters 3 with R P -C H 2-P R bridging units being formed as inter­ mediates o f the oxidative addition reductive elim ination process. The X-ray structural analysis for 5 b (R = N E t2) reveals an Fe3(C O)9PR butterfly core to which the phosphaalkene ligand R -P = C H 2 (P = C bond length 1.766(4) Ä) is coordinated in a //3,^-m anner. In case o f meth­ ylenebisphosphines 1 with bulky substituents (R = 2,4,6-/Pr3C6H 2) the phosphinidene frag­ mentation o f the P -C -P skeleton is accompanied by the form ation o f 2,3-dihydrobenzo[b]-phosphole ligands. 
  Reference    Z. Naturforsch. 47b, 1529 (1992); eingegangen am 7. Januar 1992 
  Published    1992 
  Keywords    Phosphinidene Fragmentation, Bifunctional Chlorophosphines, D ehalogenation, Phosphaalkenes, Clusters 
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 TEI-XML for    default:Reihe_B/47/ZNB-1992-47b-1529.pdf 
 Identifier    ZNB-1992-47b-1529 
 Volume    47