144889-65-6Relevant academic research and scientific papers
Structural Study of 3-Oxypropyltin Compounds
Forrester, Alexander R.,Garden, Simon J.,Howie, R. Alan,Wardell, James L.
, p. 2615 - 2622 (1992)
The structures of (3-hydroxypropyl)iododiphenyltin 3 and 2,7-diiodo-2,7-diphenyl-1,6-dioxa-2,7-distannacyclodecane 6 have been determined by single-crystal X-ray diffraction.Compound 6, obtained by controlled thermolysis of 3, has a tricyclic structure, with a central Sn2O2 ring arising from transannular, Sn-O interactions.The terminal rings in centrosymmetric 6 are in a transoid arrangement with respect to the central Sn2O2 ring, i.e. there is a stepped geometry.The tin atoms have trigonal-bipyramidal geometries being bonded in equatorial sites to two carbons and one oxygen and in axial sites to the iodine and to oxygen : I-Sn-O 161.7(2) deg.In C6H6 and in chlorocarben solutions, 6 exists as a 4.2:1 mixture of two isomers: the major one has the solid structure while the minor one has the terminal rings in an umbrella configuration, i.e. the terminal rings are cisoid with respect to the central Sn2O2 ring.Two sets of tin couplings to C(3) β> and to C(4) α> of each isomer were observed.Compound 3 exists as a chelate complex, with trigonal-bipyramidal tin: three equatorial C, with I and O axial .Chelation persists in chlorocarben solvents.
