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1990 (1)
1Author    A. Sasane, S. Fukumitsu, Y. Mori, D. NakamuraRequires cookie*
 Title    Temperature Dependence Studies of 3 5 CI NQR Frequencies in Magnesium and Nickel Hexachlorotellurate(IV) Hexahydrates and Nickel Hexachloroiridate(IV) Hexahydrate  
 Abstract    The 35 C1 NQR frequencies in MgTeCl 6 • 6 H 2 0, NiTeCl 6 • 6 H 2 0, and NiIrCl 6 • 6 H 2 0 have been determined at various temperatures. These compounds form rhombohedral crystals with the space group R3, showing a single resonance line. The 35 C1 NQR frequencies of the Te(IV) complexes exhibit an unusual positive temperature coefficient. The deuterated analogs of the Te(IV) complexes show a small frequency shift at 77 K. These results are interpreted by the presene of O-H • • • CI type weak H-bonds. The resonance frequency of the Ir(IV) complex versus temperature curve shows a minimum and a maximum. This unusual temperature dependence is mainly explained by the same type of the H-bond as existing in the Te(IV) complexes. The 7r-bond formation between Ir and CI atoms is also partly responsible for the unusual temperature dependence. 
  Reference    Z. Naturforsch. 45a, 303—306 (1990); received October 21 1989 
  Published    1990 
  Keywords    35 C1 NQR frequency, Positive temperature coefficient, H-bond, rc-bond, 1 H-2 H isotope effect 
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 TEI-XML for    default:Reihe_A/45/ZNA-1990-45a-0303.pdf 
 Identifier    ZNA-1990-45a-0303 
 Volume    45