title: Dimethyl-bis-(pyrazine-2-carboxyl-ato-κ(2)N(1),O)tin(IV).
abstract: In the title compound, [Sn(CH(3))(2)(C(5)H(3)N(2)O(2))(2)], the Sn(IV) atom is twice N,O-chelated by two pyrazine-2-carboxyl-ate ligands. The distorted six-coordination is completed by two tin-bound methyl C atoms. The C(2)N(2)O(2) donor set defines a skewed trapezoidal-bipyramidal geometry. Inter-molecular π-π inter-actions between the pyrazine rings [centroid-centroid distance = 3.8112 (13) Å] are observed.
authors.affiliation: Department of Chemistry, General Campus, Shahid Beheshti University, Tehran 1983963113,  Iran.
authors.forename: Marzieh
authors.initials: M
authors.lastname: Vafaee
authors.forename: Ezzatollah
authors.initials: E
authors.lastname: Najafi
authors.forename: Mostafa
authors.initials: M
authors.lastname: M Amini
authors.forename: Seik Weng
authors.initials: SW
authors.lastname: Ng