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메탄올중 치환 2-Phenylethyl Benzenesulfonates와 1,4-Diazabicyclo[2.2.2]octane의 반응속도에 미치는 이탈기효과
한광래,서혁춘,이국행 全北大學校 科學敎育硏究所 1988 과학과 과학교육 논문지 Vol.13 No.-
Leaving group effects for the reaction of substituted 2-phenylethyl benzenesulfonates with 1,4-diazabicyclo[2.2.2]octane were studied conductometrically in methanol at 44.5℃ and 54.5℃ The rate constants were calculated by Guggenheim equation and activation ther-modynamic parameters were also evaluated. The rates of reaction were increased with electron donating ability of substituent in substrate and with electron withdrawing ability of substituent in leaving group. The isokinetic relationship between △H^≠vs.△S^≠ was well correlated and this reaction is entropy controlled. The Hammett plots were correlated with good linearity and the value ρz is 0.96. From the activation parameters and the Hammett relationship, this reaction was. found dissociative S_N2 mechanism.
A Study on the B-Cl Symmetric Stretching Vibration-Rotation Spectra of Gaseous HBCl_2 Molecule
Yoo, Hean Jung,Han, Gwang Lae,Lee, Kuk Haeng,Suh, Hyoack Choon 全北大學校 科學敎育硏究所 1989 과학과 과학교육 논문지 Vol.14 No.-
TEA CO_2레이저를 이용하여 BCl_3와 H_2/D_2 기체로부터 HBCl_2를 합성한 후 분해능 0.12㎝^-1의 FT―IR 스펙트럼을 얻었다. B―Cl대칭 뻗침 v_2의 진동―회전값을 얻었으며 H^11BCl_2, D^11BCl_2 및 D^10BCl_2의 기본진동은 각각 734.62, 709.08와 723.15㎝^-1이었다. DBCl_2 분자의 v_1과 2v_s에 대한 Fermi resonance의 기본진동은 1911.05㎝^-1이었다. 바닥상태때의 회전상수값을 마이크로웨이브값과 비교하였으며, 아울러 P. R가지 모양은 전형적인 B형태임을 보여줬다.