Can Benzotriazolium Chloride Form Deep Eutectic Solvents? An Analysis of the Urea-Benzotriazolium Chloride Hydrogen Bond Network
Ahmad Mudzakir1*, Rizal Razalin2, Muhammad Ali Zulfikar3, Muhammad Yudhistira Azis3, Anni Anggraeni4, Mia Widyaningsih1, and Karina Mulya Rizky1

1. Departemen Pendidikan Kimia, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, 14054, Bandung, Jawa Barat, Indonesia
2. School of Chemical Sciences, 11800, Universiti Sains Malaysia, Pulau Pinang, Malaysia
3. Departemen Kimia, Institut Teknologi Bandung, Jl. Ganesha 10 Bandung, Jawa Barat, Indonesia
4. Departemen Kimia, Universitas Padjajaran, Jl. Ir. Soekarno km. 21, Jatinangor, Kab. Sumedang, 45363, Jawa Barat, Indonesia

Abstract

Ionic crystal of the 1,3-dimethyl-1,2,3-benzotriazolium chloride urea has been prepared and structurally characterized, in order to investigate the possibility of the salt to form Deep Eutectic Solvents (DES) with urea. DES have been known since 2004, and since then, many researchers have published some articles on their synthesis, characterization, and application. With increasing interest in this new class of solvents, electrolytes and engineering fluids, there is an impetus to understand the formation and function of these solvents at the molecular level. If this aspect can be obtained in detail, it will in turn help in the design of further DES. In this study, be will discussed the crystal structure of a new class III DES, based on the benzotriazolium cation, which is a mixture of urea and 1,3-dimethyl-benzotriazolium chloride. This hydrogen bond network on the structure can explain the role of intermolecular and intra-molecular hydrogen bonds in the formation of this potential DES.

Keywords: Deep Eutectic Solvents- Benzotriazolium Chloride- Urea- Hydrogen Bonding Network- Intermolecular- and Intra-Molecular Hydrogen Bonds

Topic: Inorganic Chemistry