CRYSTAL-STRUCTURE OF 2,2,4,7,7-PENTAMETHYL-3,6-DITHIAOCTANE TETRACARBONYL TUNGSTEN(0)

The x-ray crystal structure of the complex eta(2)-PDOW(CO)(4) (five-me mbered ring, PDO = 2, 2, 4, 7, 7-pentamethyl-3,6-dithiaoctane) is repo rted, The complex crystallizes in the monoclinic crystal system, space group P2(1)/c, [#14] with unit cell parameters a = 14.002(14) Angstro m, b = 9.340(10) Angstrom, c = 15.094(12) Angstrom, beta = 92.67(4)deg rees, V = 1972(3) Angstrom(3); Z = 4. The arrangement of the ligands a round the metal atom is distorted from octahedral geometry. Large C-O bond distances and short W-C bond distances of the carbonyl groups loc ated at a trans position with respect to PDO is indicative of a trans influence. The W-S(I) and W-S(2) bond distances of 2.545(3) and 2.545( 2) Angstrom, respectively, are shorter than observed for closely relat ed complexes.