Ionic liquids based on triethanolammonium salts of dicarboxylic acids (oxalic, malonic, succinic). Crystal structure and cation-anion interaction

Crystal Structure and Hirshfeld Surface Analysis of Bis(Triethanolamine)Nickel(II) Dinitrate Complex and a Revelation of Its Characteristics via Spectroscopic, Electrochemical and DFT Studies Towards a Promising Precursor for Metal Oxides Synthesis

“…According to the inversion symmetry, the two nitrogen atoms are in trans-conformation with respect to each other, resulting in the linear N1-Ni-N1 1 bond angle. Moreover, the O1-Ni-O1 1 exo conformation is the TEA structure, in which one hydroxyethyl moiety (exo branch) is rotated around the N-C bond, creating the infinite chain of TEA [59].…”

Crystal Structure of a New Ordered form of Ammonium Hydrogen Succinate NH4HC4H4O4

“…Numerous molecular assemblies stabilized by the existence of very short O-H···O hydrogen bonds are reported in acidic salts of succinic acid MHC4H4O4 family (M = Li + [1], Na + [2,3], K + [4], Rb + [2], Cs + [5], NH4 + [6][7][8], {(C4H4)(NH3 + )2}1/2 [9], (CH3)NH3 + [10], (C2H5)NH3 + [11], (C3H5)NH3 + [12], (C7H7O)NH3 + [13], (C8H15)NH3 + [14], (C17H22NO)NH + [15], (CH3)2NH2 + [10], (C2H5)2NH2 + [11], (C2H5O)3NH + [16,17], (C2H5)4N + [18]). Among these salts, the triclinic ammonium hydrogen succinate compound NH4HC4H4O4 evidences a second order phase transition around 170 K [6][7][8].…”

Contribution of the Scientific School of Academician M.G. Voronkov to the Development of the Chemistry of Biologically Active Atranes (Protatranes and Hydrometallatranes) (A Review)

“…For example, the preparation of tris(2-hydroxyethyl)ammonium salts of benzoic, cinnamic, salicylic, nicotinic, succinic, malonic, oxalic, malic, and citric acids (Scheme 6 ) has been reported in [ 89 ]. Structural studies of these salts have shown that the conformation of the tris(2-hydroxyethyl)ammonium cation can differ from the usual tricyclic endo- conformation [ 90 ]. Tris(2-hydroxyethyl)ammonium succinate is the first tris(2-hydroxyethyl)ammonium salt with bicyclic endo/exo -conformation of the cations (Fig.…”

“…Surprisingly, the TEA cation conformation in the closest structural analogs, tris(2-hydroxyethyl)ammonium malate and hydrosuccinate, corresponded to the tricyclic endo- conformation (Fig. 4a ) [ 90 , 91 ].…”

“… Conformation of tris(2-hydroxyethyl)ammonium cation: (a) classical tricyclic endo- conformation; (b) bicyclic endo/exo- conformation [in tris(2-hydroxyethyl)ammonium succinate] [ 90 ]. …”