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'Dipole Moments' in keywords Facet   Publication Year 1979  [X]
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1Author    Salvatore SorrisoRequires cookie*
 Title    Dielectric Measurements and Molecular Structure. Styrene Oxides and Phenylcyclopropanes  
 Abstract    The effects of electronic structure and conformation of the molecules YC6H4CHOCH2 1 1 (Y = o, m, and p-Cl) and Y'C6H4CHCCl2CH2 (Y' = o, and m-Cl) have been studied in benzene between 10.0 and 70.0 °C. In the oxirane systems the conjugation between the two rings is very small, if present at all; consequently, in the absence of steric and/or electrostatic hindrance internal rotation is observed. In the cyclopropane systems ex-amined these steric effects are sufficiently important to completely immobilise the molec-ular structure. 
  Reference    Z. Naturforsch. 34b, 1298—1302 (1979); received March 8/May 7 1979 
  Published    1979 
  Keywords    Styrene Oxides, Cyclopropanes, Conformation, Dipole Moments 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-1298.pdf 
 Identifier    ZNB-1979-34b-1298 
 Volume    34 
2Author    Salvatore SorrisoRequires cookie*
 Abstract    The electric dipole moments of acetyldiazomethane (MeCOCHN2) and 1-acetyl-1-diazo-ethane (MeCOCMeN2) between 10 and 70 °C have been measured. Using appropriate group and bond moments, the concentrations of the two rotamers present in each have been calculated and, hence, the equilibrium constant for the cis trans equilibrium at the various temperatures. ^ The change in standard enthalpy (A H°), standard free energy (A G°) and standard entropy (A S°) are reported for the conversion of one mole of cis isomer to trans isomer. 
  Reference    Z. Naturforsch. 34b, 1530—1534 (1979); received May 17 1979 
  Published    1979 
  Keywords    Dipole Moments, Diazoketones, Thermodynamic, Dielectric Measurements 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-1530.pdf 
 Identifier    ZNB-1979-34b-1530 
 Volume    34