Tetra-kis(μ(2)-5-methyl-pyrazine-2-carboxyl-ato)-1:2κN,O:O;2:3κO:N,O;1:2κO:O';3:4κO:O'-octa-octyl-1κC,2κC,3κC,4κC-di-μ(3)-oxido-1:2:3κO;1:3:4κO-tetra-tin(IV).

The title compound, [Sn(4)(C(8)H(17))(8)O(2)(C(6)H(5)N(2)O(2))(4)], is a tetra-nuclear Sn(IV) complex, built up by inversion symmetry around the central Sn(2)O(2) ring. The Sn(IV) coordination geometries are distorted SnO(3)C(2) trigonal-bipyramidal and distorted SnO(4)C(2) octa-hedral. The three-coordinate μ(3)-oxido bridging O atom in the Sn(2)O(2) ring is attached to three Sn atoms. All non-H atoms, with the exception of the Sn-bonded octyl groups, lie approximately on a non-crystallographic mirror plane.