F. Cervanteslee et al., A UNIQUE SELF-ASSEMBLED TRICYCLIC STANNASILOXANE CONTAINING A PLANAR SN3SIO5 FUSED 6.4.4-TRICYCLIC RING-SYSTEM, Journal of the Chemical Society. Dalton transactions, (1), 1998, pp. 1-2
The compound (Bu4Sn2)-Sn-t(Me2Si)O-3 . (Bu2Sn)-Sn-t(OH)(2) displays a
unique tricyclic structure consisting of fused six-membered Sn2SiO3 an
d four-membered Sn2O2 rings to form a planar SiSn3O4 skeleton, with se
verely distorted trigonal bipyramidal co-ordination at tin and tetrahe
dral co-ordination at silicon.