Hydrogen bonding in proton-transfer complexes of cytosine with trimesic and pyromellitic acids

Cocrystals of Kemp’s triacid. Part III: Structure of hydrogen-bonded complex of Kemp’s triacid with 1,1,3,3-tetramethylguanidine studied by X-ray and FT-IR methods

“…5716 (1) 4514 (2) 5462 (1) 43(1) C (10) 9729 (2) 6911 (3) 9614 (1) 47(1) C (11) 9396 (2) 8275 (3) 5514 (2) 45(1) C (12) 8088 (2) 2665 (2) 6684 (2) (2) 62 (1) U(eq) is defined as one third of the trace of the orthogonalized Uij tensor.…”

“…KTA C(1)AC (7) 1.546(2) C(3)AC (8) 1.519(2) C(5)AC (9) 1.545(2) C(7)AO (1) 1.199(3) C(7)AO (2) 1.328(2) C(8)AO (3) 1.1991(18) C(8)AO (4) 1.3090(18) C(9)AO (6) 1.2536(18) C(9)AO (5) 1.2596(18) C(2)AC(1)AC (7) 111.74(14) C(6)AC(1)AC (7) 117.19(14) C(7)AC(1)AC (10) 101.96(13) C(8)AC(3)AC (4) 108.94(13) C(8)AC(3)AC (11) 110.93(14) C(8)AC(3)AC (2) 109.89(12) C(4)AC(5)AC (9) 113.07(12) C(6)AC(5)AC (9) 114.20(12) C(9)AC(5)AC (12) 103.69(13) O(1)AC (7)AO (2) 119.89 (17) TMG cation becomes chemically C 2 symmetric with respect to the pseudo C 2 axis along the C@N bond (Fig. 3).…”

“…A large number of cocrystals have been prepared using acids, especially di-or tri-carboxylic acids, which act as proton-donors in hydrogen-bonded systems and as linkers in supramolecular crystals [6][7][8][9][10][11][12]. The knowledge of the cocrystals structure is fundamental not only for the design of other cocrystals but also for the prediction of their physico-chemical and medical properties.…”

Noncovalent-bonded 1D–3D supramolecular architectures from 2-methylquinoline/quinoline with monocarboxylic acid and dicarboxylic acid

“…Supramolecular architectures based on noncovalent interactions are fascinating and have attracted a great deal of attention. Central in the present study of the intermolecular interactions is the hydrogen bond, which is the most energetic and directional bond [2]. Weak interactions, such as CAHÁ Á ÁO, CAHÁ Á ÁN, CAHÁ Á ÁX (X = Cl, Br, I), are of considerable significance (in the absence of classical hydrogen bonds) because they play important roles in the molecular packing arrangement.…”

Construction of supramolecular helical nanofibers using renewable biomaterials: self-assembly of a cytidylic acid-appended bolaamphiphile in lemon juice

“…7 Recently, some research groups have found that the molecular recognition event involves the interaction between a cytosine nucleobase and some small carboxylic acids, and reported the formation of a supramolecular co-crystal from the cytosine and carboxylic acids. [11][12][13][14] The molecular arrangements in the lattice of the co-crystals depended on the carboxylic acid used.…”