
Zeitschrift fur Anorganische und Allgemeine Chemie p. 529 - 535 (2000)
Update date:2022-08-05
Topics:
Wirth, Andreas
Moers, Oliver
Blaschette, Armand
Jones, Peter G.
Destructive complexation of the dimeric hydroxide [Me2Sn(A)(μ-OH)]2, where A? is deprotonated benzene-1,2-disulfonimide, with two equivalents of triphenylphosphine oxide or 1,10-phenanthroline in hot MeCN produced, along with Me2SnO and water, the novel coordination compounds [Me2Sn(A)2(OPPh3)2] (3, triclinic, space group P1?) and [Me2Sn(phen)2]2⊕ · 2 A? · MeCN (4, monoclinic, P21/c). In the uncharged all-trans octahedral complex 3, the heteroligands are unidentally O-bonded to the tin atom, which resides on a crystallographic centre of inversion [Sn-O(S) 227.4(2), Sn-O(P) 219.6(2) pm, cis-angles in the range 87-93°; anionic ligand partially disordered over two equally populated sites for N, two S and non-coordinating O atoms]. The cation occurring in the crystal of 4 has a severely distorted cis-octahedral C2N4 coordination geometry around tin and represents the first authenticated example of a dicationic tin(IV) dichelate [R2Sn(L-L′)2]2⊕ to adopt a cis-structure [C-Sn-C 108.44(11)°]. The five-membered chelate rings are nearly planar, with similar bite angles of the bidentate Iigands, but unsymmetric Sn-N bond lengths, each of the longer bonds being trans to a methyl group [ring 1: N-Sn-N 71.24(7)°, Sn-N 226.81(19) and 237.5(2) pm; ring 2: 71.63(7)°, 228.0(2) and 232.20(19) pm]. In both structures, the bicyclic and effectively Cs symmetric A? ions have their five-membered rings distorted into an envelope conformation, with N atoms displaced by 28-43 pm from the corresponding C6S2 mean plane.
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