Journal of the Korean Chemical Society (대한화학회지)

Korean Chemical Society (대한화학회)
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The Behavior of Solutes in Non-Aqueous Solvents (I). The Apparent Molal Volumes of Urea, 1,3-Dimethylurea and 1,1,3,3-tetramethylurea

물아닌 용매에서의 용질의 행동의 관한 연구 (제1보). 요소, 1,3-디메틸요소 및 1,1,3,3,-테트라메틸 요소의 겉보기 몰랄부피

  • Published : 1976.10.30
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Abstract

Apparent molal volumes of urea, 1,3-dimethylurea (DMU), and 1,1,3,3-tetramethylurea(TMU) in dimethylsulfoxide(DMSO) and in methanol have been measured at low concentration by the density measurements at $25^{\circ}C$. It is confirmed that urea molecules in the dilute DMSO solution self-associate to a greater extent than in the concentrated solution, while DMU and TMU molecules in DMSO solutions interact with the solvent molecules. In addition, the molecules of the three solutes also interact predominatingly with methanol molecules.

요소, 1,3-디메틸요소(DMU)및 1,1,3,3-테트라메틸요소(TMU)의 $25^{\circ}C$에서의 겉보기 몰랄부피를 dimethylsulfoxide와 메탄올용액에서 밀도측정으로 얻었다. Dimethylsulfoxide에서 요소는 특히 묽은 용액에서 자체회합성을 보이고, DMU와 TMU는 용질-용매상호작용을 함을 알았다. 한편, 양성자성 용매인 메탄올에서 위의 3가지 용질분자는 모두 용질-용매상호작용을 우세하게 일으키고 있음을 알았다.

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