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'M olecular Structure' in keywords Facet   Publication Year 1994  [X]
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1994[X]
1Author    Haruo Niki, Hirotaka Odahara, Katsuji Tamaki, Masao HashimotoRequires cookie*
 Title    Inequivalent Reorientation of the Trichloromethyl Groups in l,4-Bis(TrichloromethyI) Benzene as Studied by Pulsed 35C1NQR  
 Abstract    The temperature dependence of Ti of 35C1 N Q R o f the title com pound evidenced that the three crystallographically inequivalent CC13 groups have different potential barriers against reorientation (about 30, 36, and 42 kJ/mol). An intramolecular interaction between rc-electrons on the benzene ring and the C -C l bond is proposed to interpret the characteristic frequency splitting com m on to the 35C1 N Q R spectrum of each of the three inequivalent CC1? groups. The magnitude of T2 of each Cl atom is interpreted by intra-and intermolecular H • • • Cl interactions. It was found that only part of the temperature dependence of the N Q R frequency can be interpreted by reorientation. 
  Reference    Z. Naturforsch. 49a, 273—2 (1994); received July 23 1993 
  Published    1994 
  Keywords    Chlorine NQ R, Spin lattice relaxation, Transeverse relaxation, M olecular structure 
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 TEI-XML for    default:Reihe_A/49/ZNA-1994-49a-0273.pdf 
 Identifier    ZNA-1994-49a-0273 
 Volume    49