메탄올에서의 무기염 및 할로겐화 테트라알킬암모늄 들의 삼투계수

Abstract

메탄올에서의 무기염들(NaI, KI, CsI, NH₄I, LiCl, NaCl, CsCl, NH₄Cl)과 Tetraalkylammonium Halide들(Et₄NI, Et₄NCL, Bt₄NCL)의 삼투계수를 45℃에서 Vapour Pressure Osmometer에 의해 구하였다. 이들은 0.015~0.150m 농도범위에서 모두 "라울의 법칙"에 정편차를 보여 주었으며, 이들을 같은 용질에 대한 물에서의 삼투계수들과 비교하였다. 간단한 1:1염들의 삼투계수는, 같은 음이온 종에서 양?結? 크기 증가에 따라 증가함을 보여주었다: NH?>Cs?>K?>Na?>Li?. 이러한 순위는 물에서의 순위와 뒤바뀐 것이다. 메탄올에서 이러한 삼투계수 순위의 바뀜은, 용액내의 용질-용질 상호작용이 용액의 행동을 설명하는데 보다 더 중요한 인자로 작용함을 보여주는 것이다. 또한 그들의 행동을 설명함에 있어서 이들 이온들의 크기 효과에 의한 것보다, 다른 여러 요인들이 더욱 중요한 인자임을 알 수 있다. 이에 비해 Tetraalkylammonium Halide들의 경우는 물에서와 같은 경향을 나타내고 있다.

The osmotic coefficients have been determined by the Vapour Pressure Osmometer for some inorganic salts and tetraalkylmmonium halides in methanol at 45℃. Solutions of all of the salts in this category are found to exhibit positive deviations from Raoult's law, for a concentration range from 0.015 to 0.150m. These are compared with data for some of the same salts in aqueous solutions. The osomotic coefficients of these simple 1:1 salts are increased with the size of cation:NH?>Cs?>K?>Na?>Li?. This order is really inverse of queous solution. Reversals in the order of the coefficients of these salts in this system gives an indication of the relative importance of solute-solute interations in methanol. And also the behavior of these salts in methanol are depend on another factor more then size effect. In contrast to the order of inorganic salts, the order of tetraalkylmmonium halides are similar to the order in aqueous solution.

The osmotic coefficients have been determined by the Vapour Pressure Osmometer for some inorganic salts and tetraalkylmmonium halides in methanol at 45℃. Solutions of all of the salts in this category are found to exhibit positive deviations from Raoult's law, for a concentration range from 0.015 to 0.150m. These are compared with data for some of the same salts in aqueous solutions. The osomotic coefficients of these simple 1:1 salts are increased with the size of cation:NH?>Cs?>K?>Na?>Li?. This order is really inverse of queous solution. Reversals in the order of the coefficients of these salts in this system gives an indication of the relative importance of solute-solute interations in methanol. And also the behavior of these salts in methanol are depend on another factor more then size effect. In contrast to the order of inorganic salts, the order of tetraalkylmmonium halides are similar to the order in aqueous solution.