Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: Iron(III) trifluoromethanesulfonate, is researched, Molecular C3F9FeO9S3, CAS is 63295-48-7, about Weak Sn···I interactions in the crystal structures of the iodostannates [SnI4]2- and [SnI3]-.Computed Properties of C3F9FeO9S3.
Iodostannate complexes can be crystallized from SnI2 solutions in polar organic solvents by precipitation with large counterions. Thereby isolated anions as well as 1D, 2D, or 3D polymeric anionic substructures are established, in which SnI3- and SnI42- groups are linked by weak Sn···I interactions. Examples are the iodostannates [Me3N(CH2)2NMe3][SnI4] (I), (Ph4P)2[Sn2I6] (II), [Me3N(CH2)2NMe3][Sn2I6] (III), [Fe(DMF)6][SnI3]2 (IV), and (Pr4N)[SnI3] (V), which were characterized by single crystal x-ray diffraction. Compound I: a = 671.6(2), b = 1373.3(4), c = 2046.6(9) pm, V = 1887.7(11) × 106 pm3, space group Pbcm; II: a = 1168.05(6), b = 717.06(4), c = 3093.40(10) pm, β = 101.202(4)°, V = 2541.6(2) × 106 pm3, space group P21/n; III: a = 695.58(4), b = 1748.30(8), c = 987.12(5) pm, β = 92.789(6)°, V = 1199.00(11) × 106 pm3, space group P21/c; IV: a = 884.99(8), b = 1019.04(8), c = 1218.20(8) pm, α = 92.715(7), β = 105.826(7), γ = 98.241(7), V = 1041.7(1) × 106 pm3, space group P1̅; V: a = 912.6(2), b = 1205.1(2), c = 1885.4(3) pm, V = 2073.5(7) × 106 pm3, space group P212121.
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Reference:
Piperidine – Wikipedia,
Piperidine | C5H11N – PubChem