title: Dicarbon-yl(pyrazine-1,3-dithiol-ato-κS,S')bis-(trimethyl-phosphane-κP)iron(II).
abstract: The title compound, [Fe(C(4)H(2)N(2)S(2))(C(3)H(9)P)(2)(CO)(2)], was obtained as a mononuclear by-product during the treatment of [Fe(2)(μ-S(2)C(4)N(2)H(2))(CO)(6)] in excess trimethyl-phosphane. The Fe atom is six-coordinated by two thiol-ate S atoms, two phosphane P atoms and two carbonyl C atoms in a distorted octa-hedral geometry. The average Fe-C(O) distance (1.771 Å) is relatively shorter than that of its parent hexa-carbonyl-diiron compound, and differs by 0.511 Å from the average Fe-P(Me)(3) distance. The five-membered FeC(2)S(2) chelate ring plane is close to being perpendicular to the P/Fe/P plane [86.5 (2)°].
authors.affiliation: School of Materials Science and Engineering, Changchun University of Science and Technology, No. 7989 Weixing Road, Changchun 130022,  People's Republic of China.
authors.forename: Shang
authors.initials: S
authors.lastname: Gao
authors.forename: Qian
authors.initials: Q
authors.lastname: Duan
authors.forename: Chun-Ai
authors.initials: CA
authors.lastname: An
authors.forename: Da-Yong
authors.initials: DY
authors.lastname: Jiang