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Synthesis, characterization and in vitro antitumour activity of dibutyltin carboxylates involving the perfluorophenyl moiety: crystal structure of the dimeric bis[(4-fluoro- and pentafluorobenzoato)di-n-butyltin] oxides

par Gielen, Marcel ;Tiekink, Edward;Bouhdid, Abdeslam;De Vos, Danièle ;Biesemans, Monique;Verbruggen, Ingrid;Willem, Rudolph
Référence Applied organometallic chemistry, 9, 7, page (639-648)
Publication Publié, 1995-11

Article révisé par les pairs

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Résumé :

Crystal structure determinations of {[(F5C6COO)Bu2Sn]2O}2 and {[(4-F-C6H4COO)-Bu2Sn]2O}2 show that the structures are similar and feature central Bu4Sn2O2 units with two Bu2Sn groups connected by bridging oxygen atoms. Each pair of exo- and endo-cyclic tin atoms is linked by an almost symmetrically bridging carboxylate group, with the two remaining groups attached to the exocyclic tin atom only. Crystals of {[(F5C6COO)Bu2Sn]2O}2 are triclinic, space group P1, with unit cell dimensions a = 12.425(3) Å, b = 13.090(5) Å, c = 11.697(3) Å, α = 95.31(3)°, β = 93.28(2)°, γ = 113.01(2)°, V = 1734(1) Å3, Z = 1. Crystals of {[(4-F-C6H4COO)Bu2Sn]2O}2, are also triclinic, space group PI, a = 12.599(6) Å, b= 25.359(4) Å, c = 11.480(4) Å, α = 91.44(3)°, β = 114.77(3)°, γ=97.43(3)°, V=3289(2) Å3, Z=2. The structures were refined to final R= 0.046, Rw = 0.046 for 4312 reflections with I≥ 3.0 σ(l) for {[(F5C6COO)Bu2Sn]2O}2 and R=0.061, Rw=0.068 for 4112 reflections with l≥3.0 σ(l for {[(4-F-C6H4COO)Bu2Sn]2O}2.