From chains to ladders in co-crystals with 2,3-thiophene-15-crown-5, 2,3-naphtho-15-crown-5, and bis-(18-crown-6)-stilbene constructed by weak hydrogen bondingCCDC reference numbers 771037-771042. For crystallographic data in CIF or other electronic format see DOI: 10.1039/c005284c

• Main Authors: Ganin, Eduard V, Basok, Stepan S, Yavolovskii, Arkadii A, Botoshansky, Mark M, Fonari, Marina S
• Format: Article
• Language: English
• ISSN: 1466-8033
• DOI: 10.1039/c005284c

For the first time a series of co-crystals of 2,3-thiophene-15-crown-5 1 , 2,3-naphtho-15-crown-5 2 , bis-(18-crown-6)-stilbene 3 with dithiooxamide a , 1,2,5-oxadiazole-3,4-diamine b , and 3-nitro-1H-1,2,4-triazole c with compositions 1a , 2a , 2b·H 2 O , 2c , and 3a 2 were prepared and their structures were studied by X-ray crystallography. The components in the co-crystals demonstrate the different modes of mutual arrangement and contribution of diverse weak interactions to the final architecture. Infinite chains of the alternating component molecules linked by N-H O hydrogen bonds characterise the structures of 1a and 2a , whereas in the case of 3a 2 formation of the loosely packed ladder-type structure was observed. In 2b·H 2 O the planar naphtho- and oxadiazole moieties demonstrate their edge-to-face arrangement, while in 2c the partially overlapping naphtho- and triazole moieties provide effective face-to-face π-π stacking interactions. The improved synthetic strategy for 1 and 2 is given. The dithiooxamide molecule forms 1 : 1 chains with 2,3-thiophene-15C5 and 2,3-naphtho-15C5, and a ladder with bis-(18C6)-stilbene.