Synthesis and characterization of {[(n-BU)2Sn(O2CCH=CHAr)]2O}2 and crystal structure of {[(n-BU)2Sn(O2CCH=CHPh)]2O}2

The tin organotin compounds {[(n-Bu)(2)Sn(O2CCH=CHAr)](2)O}(2) have been synthesized by the reaction of (n-Bu)(2)SnO with ArCH=CHCO2H in 1:1 molar ratio. The crystal structure of ( [(n-Bu)(2)Sn(O2CCH=CHPh)](2)O}(2) is determined by X-ray single crystal diffraction. This compound is centrosymmetric dimer structure mode with a four-membered central endocyclic Sn2O2 unit in which the bridged oxygen atoms are tri-coordinated. Each bridged oxygen atom also connects with an exo-cyclic tin atom. The endo-cyclic tin atoms are five-coordination and have coordination geometry of distorted trigonal bipyramid. The exo-cyclic tin atoms are six-coordinate and have coordination geometry of distorted octahedral. The crystal belongs to a triclinic system with space group Pi, a=10.172(11) Angstrom, b=13.804(16) Angstrom, c=14.703(17) Angstrom, alpha=106.750(18)degrees, beta=105.61(2))degrees, gamma=100.295(18)degrees, Z=1, V=1829(4) Angstrom(-3), Dc=1.413 g/m(3), mu=1.400 mm(-1), F(OOO)=792, R=0.056, wR=0.125.