First Example of a Hydrogen-Bonded Three-Dimensional Pillared Structure Involving an Organotin Motif:  Synthesis and X-ray Crystal Structures of {[ⁿBu₂Sn(H₂O)₃(L)Sn(H₂O)₃ⁿBu₂]²⁺[L]^2-}·2MeOH·2H₂O and {[Ph₃Sn(L)Sn(H₂O)Ph₃]_n}·THF (L = 1,5-Naphthalenedisulfonate)

The reaction of a disulfonic acid with ⁿBu₃SnOSnⁿBu₃ generates the Sn−alkyl-cleaved dicationic species {[ⁿBu₂Sn(H₂O)₃(L)Sn(H₂O)₃ⁿBu₂]²⁺[L]^2-}· 2MeOH·2H₂O (4; L = 1,5-naphthalenedisulfonate, 1,5-C₁₀H₆-(SO₃)₂). The corresponding reaction with Ph₃SnOSnPh₃ leads to the unusual zigzag polymer {[Ph₃Sn(L)Sn(H₂O)Ph₃]_n}·THF (5), which contains an Sn−O motif in the backbone as well as a pendant group.