Zinc and Cobalt Aqua Complexes with Cucurbit[6]uril: Syntheses and Crystal Structures

• Published in: Russian journal of coordination chemistry Vol. 45; no. 6; pp. 433 - 438
• Main Authors: Andrienko, I. V., Kovalenko, E. A., Karmadonova, I. E., Plyusnin, P. E., Samsonenko, D. G., Fedin, V. P.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.06.2019; Springer Nature B.V
• Subjects: Aqueous solutions; Chemical analysis; Chemistry; Chemistry and Materials Science; Cobalt compounds; Crystal structure; Crystals; Infrared analysis; Infrared spectroscopy; Inorganic Chemistry; Physical Chemistry; Thermogravimetry; X-ray diffraction; Zinc coordination; crystal structure; cucurbituril; cobalt complexes; supramolecular chemistry; X-ray diffraction analysis; zinc complexes
• ISSN: 1070-3284; 1608-3318
• DOI: 10.1134/S1070328419060010

Supramolecular complexes [Zn(H 2 O) 4 (C 36 H 36 N 24 O 12 )](NO 3 ) 2 · 6.5H 2 O ( I ), [Zn(H 2 O) 4 -(C 36 H 36 N 24 O 12 )](NO 3 ) 2 · 7H 2 O ( II ), and [Co(H 2 O) 4 (C 36 H 36 N 24 O 12 )](NO 3 ) 2 · 7H 2 O ( III ) are synthesized by the slow (for I and III ) and fast (for II ) cooling (after reflux) of aqueous solutions of a mixture of salts of the corresponding metals and cucurbit[6]uril. According to the X-ray diffraction data (СIF files CCDC nos. 1862494 ( I ), 1862495 ( II ), and 1862496 ( III )), the supramolecular complexes are the first examples of the direct coordination of the zinc and cobalt atoms to the cucurbit[6]uril molecule. Compounds I–III are characterized by X-ray diffraction analysis, thermogravimetry, IR spectroscopy, and elemental analysis.