Self-assembly of ionic triorganotin(IV) complexes of tetrafluorophthalic acid with a tetranuclear macrocyclic or polymeric structure: syntheses,characterization and crystal structures |
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Abstract: | Four triorganotin(IV) complexes constructed from tetrafluorophthalic acid (H2tfp) with a 1?:?1?:?1 molar ratio of H2tfp: Et3N: R3SnCl gave two of type {[R3Sn (tfp)].Et3NH}4 (R?=?Me 1, R?=?n-Bu 2), and two of type [R3Sn (tfp).Et3NH] n (R?=?PhCH2 3, Ph 4). All the complexes are characterized by elemental, IR, 1H, 13C and 119Sn NMR analyses. Complexes 1 and 4 were also confirmed by X-ray crystallography. Complex 1 is tetranuclear with a 28-membered C16O8Sn4 macrocyclic ring system with a cavity. The supramolecular structure of 1 has been found to consist of a three-dimensional network built up by intermolecular N–H?···?O, C–H?···?O hydrogen bonds and C–F?···?F weak interactions. Complex 4 is an infinite polymeric structure. The salient feature of the supramolecular structure of 4 is that of a two-dimensional plane, in which intermolecular N–H?···?O and C–H?···?π hydrogen bonds are important. |
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Keywords: | Triorganotin(IV) Tetrafluorophthalic acid Macrocyclic ring Polymeric structure |
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