Structual parameters

Two kinds of pitch-based ACFs (P5 and P20 Osaka Gas Co.) were used. The microporous structure was determined by high-resolution N, adsorption isotherms at 77 K using a gravimetric method. The micropore structual parameters were obtained from high-resolution a, -plot analysis with subtracting pore effect (SPE) method. The average slit pore width w was determined from the micropore volume and the surface area. The adsorption isotherms of methanol and ethanol on carbon samples were gravimetrically measured at 303 K. The sample was preevacuated at 10 mPa and 383 K for 2h. 

However, in the paper authored by Kovacs (1999) and published almost simultaneously with the work of Hargittai (2000), the author proves pyramidality of LaCla and D)KI l3 on the basis of DFT calculations. We note that similar conclusions were drawn earlier by Joubert et al. (1998b), Adamo and Maldivi (1997, 1998). In addition, simultaneously, the structual parameters for dimers were simultaneously established. The intensities of the IR bands of dimers and monomers give a sound explanation as to why the v-i band could not be identified in the spectra of lanthanide trichlorides. It was found that the difference of the vibrational frequencies between dimers and monomers is so small and the intensity ratio between the corresponding bands is such that a dimer content of 1% is sufficient to mask the symmetrical stretching vibration in vapors of these compounds (whose intensity is low) by the bands of these dimers. Note that the vibrational frequencies obtained by Kovacs (1999) are closest to the experimental data (Selivanov et al., 1973) on LaCla. 

Table 2 Structual parameter of LCF Film thickness spac i ng...

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