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1980 (1)
1978 (1)
1Author    H. Homborg, W. KalzRequires cookie*
 Title    Darstellung und Charakterisierung von Tetraalkylammonium-lithium- phthaloeyaninen Preparation and Characterisation of Tetraalkylammonium-lithium-phthalocyanines  
 Abstract    The preparation of some tetraalkylammonium-lithium-phthalocyanines is described. In contrast to the known dilithium-phthalocyanine these quarternary "onium"-salts are, dependent on the size of the alkyl groups, soluble in non-polar, aprotic solvents. The electronic spectra are investigated as a film on a quartz disk at 10 K. Under these condi-tions a large number of narrow bands is observed instead of the normally diffuse ones. Solid state resonance Raman spectra were studied at 85 K by a method involving spinning KBr disks. It is shown that nearly all the lines are as a rule very sensitive to excitation conditions. The vibrational spectra are compared with the structural features of the compounds. 
  Reference    Z. Naturforsch. 33b, 968—975 (1978); eingegangen am 26. Juni 1978 
  Published    1978 
  Keywords    TetraalkylammoniumJithium-phthalocyanines, Vibrational Spectra, UVS Spectra 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0968.pdf 
 Identifier    ZNB-1978-33b-0968 
 Volume    33 
2Author    W. Preetz, G. PetersRequires cookie*
 Title    Darstellung und Charakterisierung der Tetrabutylammoniumsalze von [TC2C18] 2 ", [TC2C18] 3 -und [Te2Br8] 2 - Preparation and Characterization of the Tetrabutylammonium Salts of [TcaClg] 2 -, [Tc2Cl8] 3 -and [Tc2Br8] 2  
 Abstract    The reduction of [TcCL] 2-with Zn in conc. HCl after evaporation and extraction of ZnCl2 by diethylether yields a red-brown product from which after dissolving in dilute HCl by a solution of (TBA)Cl in CH2C12 (TBA)2[Tc2Cl8] and (TBA)3[Tc2Cl8] can be extracted. The separation is achieved by the much better solubility of the green (TBA)2[Tc2Cl8] in acetone compared with that of the grey-blue (TBA)3[Tc2Cl8]. On treatment of (TBA)2[Tc2Cl8] dissolved in acetone with bromine-free conc. HBr carmine red (TBA)2[Tc2Br8] is obtained for the first time. The vibrational spectra are similar and can be assigned according to the assumed D4H-symmetry. In the Raman spectra of both octachloroditechnetates the intensive Tc-Tc-vibration (Aig) is observed at 307 cm -1 , for (TBA)2[Tc2Br8] it is found at 323 cm-1 . The electronic spectrum of (TBA)2[Tc2Cl8] agrees to a high extent with that of the corresponding Re compound. 
  Reference    Z. Naturforsch. 35b, 797—801 (1980); eingegangen am 17. März 1980 
  Published    1980 
  Keywords    Octachloroditechnetate(III), Octachloroditechnetate(II, III), Octabromoditechnetate(III), Raman Spectra, IR Spectra, UVS Spectra 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0797.pdf 
 Identifier    ZNB-1980-35b-0797 
 Volume    35