In the three spiroacenaphthylene structures 5′′-[(E)-2,3-dichlorobenzylidene]-7′-(2,3-dichlorophenyl)-1′′-methyldispiro[acenaphthylene-1,5′-pyrrolo[1,2-c][1,3]thiazole-6′,3′′-piperidine]-2,4′′-dione, C35H26Cl4N2O2S, (I), 5′′-[(E)-4-fluorobenzylidene]-7′-(4-fluorophenyl)-1′′-methyldispiro[acenaphthylene-1,5′-pyrrolo[1,2-c][1,3]thiazole-6′,3′′-piperidine]-2,4′′-dione, C35H28F2N2O2S, (II), and 5′′-[(E)-4-bromobenzylidene]-7′-(4-bromophenyl)-1′′-methyldispiro[acenaphthylene-1,5′-pyrrolo[1,2-c][1,3]thiazole-6′,3′′-piperidine]-2,4′′-dione, C35H28Br2N2O2S, (III), the substituted aryl groups are 2,3-dichloro-, 4-fluoro- and 4-bromophenyl, respectively. The six-membered piperidine ring in all three structures adopts a half-chair conformation, the thiazolidine ring adopts a slightly twisted envelope and the pyrrolidine ring an envelope conformation; in each case, the C atom linking the rings is the flap atom. In all three structures, weak intramolecular C—H...O interactions are present. The crystal packing is stabilized through a number of intermolecular C—H...O and C—H...Xinteractions, whereX= Cl in (I) and F or S in (II), and C—H...O interactions are observed predominantly in (III). In all three structures, molecules are linked through centrosymmetric ring motifs, further tailored through a relay of C—H...X[Cl in (I), Br in (II) and O in (III)] interactions.
在三种螺苊烯结构中,5′′-[(E)-2,3-二氯亚苄基]-7′-(2,3-二氯苯基)-1′′-甲基二螺[苊烯-1,5′-吡咯并[1,2-c][1,3]噻唑-6′、3′′-哌啶]-2,4′′-二酮,C35H26Cl4N2O2S,(I),5′′-[(E)-4-氟亚苄基]-7′-(4-氟苯基)-1′′-甲基二螺[苊烯-1,5′-吡咯并[1,2-c][1、(II),以及 5′′-[(E)-4-溴亚苄基]-7′-(4-溴苯基)-1′′-甲基二螺[苊烯-1,5′-吡咯并[1,2-c][1,3]噻唑]-2,4′′-二酮,C35H28F2N2O2S,(II)2-c][1,3]噻唑-6′,3′′-哌啶]-2,4′′-二酮,C35H28Br2N2O2S,(Ⅲ),取代的芳基分别为 2,3-二氯、4-氟和 4-溴苯基。这三种结构中的六元哌啶环都采用了半对椅构象,噻唑烷环采用了略微扭曲的包络构象,而吡咯烷环则采用了包络构象;在每种情况下,连接环的 C 原子都是襟翼原子。在所有这三种结构中,都存在微弱的分子内 C-H...O 相互作用。晶体结构通过一些分子间的 C-H...O 和 C-H...X 相互作用得到稳定,其中 (I) 中的 X= Cl,(II) 中的 X= F 或 S,(III) 中主要观察到 C-H...O 相互作用。在所有这三种结构中,分子都是通过中心对称环图案连接起来的,并通过 C-H...X[(I) 中为 Cl,(II) 中为 Br,(III) 中为 O]相互作用的中继作用进一步调整。