Synthesis and Crystal Structures of Two Novel O, N-Containing Spiro Compounds

Abstract

1187. In 1, there exist some intra-and inter-molecular hydrogen bonds and C-H¨¨¨π supramolecular interactions, while there are still 𨨨π stacking interactions except for some intra-and intermolecular hydrogen bonds in 2. Two compounds both form a three-dimensional network structure via above intermolecular interactions.

Synthesis and Crystal Structures of Two New Oxaspirocyclic Compounds

“…115.4(2) C(10)−C(15)−C (14) 117.61(2) C(10)−C(15)−C (9) 116.42(2) C(10)−C(15)−C(9) 119.42 (19) The two compounds both consist of a phenyl ring and 6,10-dioxaspiro [4.5]decane-7,9-dione group which connects a five-membered cyclopentane ring with the other O-containing six-membered ring by a C spiro atom (Figure 1). The selected bond lengths and bond angles of compound 1 are similar to those of 2 correspondingly.…”

“…The presence of oxaspirocyclic compounds in various natural products has also emerged, increasing interest due to their important biological activities, such as antimicrobial [9,10], antitumor [11] ,antiproliferative [12], antiviral [13], antiplasmodial [14] and antihistamic [15] activity etc. Based on these reasons, our group began to synthesize various oxaspirocyclic compounds and study their chemical properties [16][17][18][19]. In addition, to the best of our knowledge, oxaspirocyclic compounds derived from 6,10-dioxaspiro [4.5]decane-7,9-dione are very rare.…”

Synthesis, Crystal Structures, and Properties of Two Coordination Polymers Built from Imidazolyl and Carboxylate Ligands

“…The structure design methodology and properties of coordination polymers are mainly dependent on the intrinsic organic linkers [9,10], inorganic metal units, as well as the external synthesis conditions such as reaction temperatures, pH of the medium, reaction solvents, and counter anions [11][12][13]. Generally, organic linkers with N and/or O donors have often been utilized as effective building units in the process of coordination polymers [14,15].…”

Synthesis, Crystal Structures, and Photoluminescent Properties of Two Supramolecular Architectures Based on Difunctional Ligands Containing Imidazolyl and Carboxyl Groups

“…Due to their favorable coordination abilities for the N or O donor atoms, the organic linkers incorporating N-heterocyclic bridging or carboxyl groups ligands are extensively applied to construct coordination polymers and have made great progress in the field of crystal engineering [7,8]. The N-heterocyclic bridging ligands include imidazole, triazole, tetrazole, and pyridine or its analogues such as pyridazine, tetrazine, triazine, and pyrazine moieties [9][10][11][12].…”

“…It should be noted that numerous intermolecular π-π and C-H···π interactions exist among the aromatic rings, as shown in Figure 3. The benzene rings of the L 1 − ligands between the adjacent 2D layers are parallel and are separated by a centroid-centroid distance of 3.94 Å and C-H···π distance of 3.32 Å [7,19]. The non-classic weak π-π and C-H···π interactions further link the 2D layers into three-dimensional (3D) supramolecular polymer ( Figure 3).…”