Crystal structure of a supramolecular lithium complex of p-tert-butylcalix[4]arene

Acta Crystallographica Section E: Crystallographic Communications

Fumio Hamada¹  Muniyappan Rajiv Gandhi²  Kazuhiko Akimoto³  Manabu Yamada⁴ 

[1] Emeritus Professor, Akita University, 1-1 Tegatagakuen-machi, Akita 010-8502, Japan;Graduate School of International Resource Sciences, Akita University, 1-1 Tegatagakuen-machi, Akita 010-8502, Japan;Nissan Chemical Industries, LTD, 6903-1 Ooaza-Onoda, Sanyo-Onoda, Yamaguchi 756-0093, Japan;Research Center for Engineering Science, Graduate School of Engineering Science, Akita University, 1-1 Tegatagakuen-machi, Akita 010-8502, Japan;

关键词: crystal structure;    calix[4]arene;    supramolecular lithium complex;    inclusion compound;    hydrogen bonding;    C—H...π interactions;   

DOI  :  10.1107/S2056989018001834

来源: DOAJ

【 摘 要 】

Crystals of a supramolecular lithium complex with a calix[4]arene derivative, namely tetramethanollithium 5,11,17,23-tetra-tert-butyl-25,26,27-trihydroxy-28-oxidocalix[4]arene methanol monosolvate, [Li(CH3OH)4](C44H55O4)·CH3OH or [Li(CH3OH)4]+·(calix[4]arene−)]·CH3OH (where calix[4]arene− represents a mono-anion species because of deprotonation of one H atom of the calixarene hydroxy groups), were obtained from p-tert-butylcalix[4]arene reacted with LiH in tetrahydrofuran, followed by recrystallization from methanol. The asymmetric unit comprises one mono-anionic calixarene molecule, one Li+ cation coordinated to four methanol molecules, and one methanol molecule included in the calixarene cavity. The calixarene molecule maintains a cone conformation by intramolecular hydrogen bonding between one phenoxide (–O−) and three pendent calixarene hydroxy groups (–OH). The coordinated methanol molecules around the metal cation play a significant role in forming the supramolecular assembly. The crystal structure of this assembly is stabilized by three sets of intermolecular interactions: (i) hydrogen bonds involving the –OH and –O− moieties of the calixarene molecules, the –OH groups of the coordinated methanol molecules, and the –OH group of the methanol molecule included in the calixarene cavity; (ii) C—H...π interactions between the calixarene molecules and/or the coordinated methanol molecules; (iii) O—H...π interactions between the calixarene molecule and the included methanol molecule.

【 授权许可】

Unknown