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'Conformation' in keywords Facet   Publication Year 1999  [X]
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1Author    Steffen Runge3, MathiasO. Senge3, Karin Ruhlandt-SengebRequires cookie*
 Title    5,10,15,20-Tetrakis(diphenylmethyl)porphyrin -A Nonplanar Porphyrin with Intermediate Degree of Ruffling  
 Abstract    The title compound was prepared by condensation of pyrrole and diphenylacetaldehyde in 16% yield. Based on spectroscopic data, the free base porphyrin exhibits a nonplanar macrocycle in solution with a degree of distortion between that of 5,10,15,20-tetracyclohexyl-porphyrin and 5,10,15,20-tetra(r-butyl)porphyrin. A crystal structure determination of the cobalt(II) complex reveals a ruffled macrocycle conformation with an average out-of-plane displacement of the m eso carbon atoms by 0.55 A. 
  Reference    Z. Naturforsch. 54b, 662 (1999); received February 17 1999 
  Published    1999 
  Keywords    Porphyrins, Steric Strain, Cobalt Porphyrins, Crystal Structure, Conformation 
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 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-0662.pdf 
 Identifier    ZNB-1999-54b-0662 
 Volume    54 
2Author    Z. NaturforschRequires cookie*
 Title    Indium Triiodide Complexes of Bis(diphenyIphosphino)ethane (dppe) and its Disulfide (dppeS2)  
 Abstract    Bis(diphenylphosphino)ethane (dppe) and its disulfide (dppeS2) react with two equivalents of indium triiodide to give high yields of the corresponding 1:2 adducts. According to crys­ tal structure determinations, both compounds are molecular bis-terminal complexes with the ligands in an all-trans conformation. Contrary to previous findings for complexes of the indium trihalides and of G aB r3 and G al3 with ditertiary phosphines in fixed cis-structure [bis(diphenylphosphino)ethene or -benzene], no iodide redistribution is observed to give the ionic species [(dppe)Inl2]+ [InL ]-. The molecular structures are also retained in solution. 
  Reference    (Z. Naturforsch. 54b, 21—25 [1999]; received October 10 1998) 
  Published    1999 
  Keywords    Indium Triiodide, Phosphine Complexes, Phosphine Sulfide Complexes, Conformation, Crystal Structure 
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 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-0021.pdf 
 Identifier    ZNB-1999-54b-0021 
 Volume    54