Synthesis and characterization of [Cr(CO)5{SCHCHC(SEt)2}] and [Cr(CO)5{SC(SCHCH2)SEt}] by ring-opening of 1,3-dithiolane-2-thione: crystal and molecular structure of [Cr(CO)5{SCHCHC(SEt)2}]

Abstract

The compound [Cr(CO)₅{S[graphic omitted]}] reacted with Li(NPrⁱ₂), CS₂, and [Et₃O][BF₄] to afford either [Cr(CO)₅{SCHCHC(SEt)₂}](1) or [Cr(CO)₅{SC(SCHCH₂)SEt}](2) depending upon the reaction conditions employed. The crystal structure of the co-ordinated thioaldehyde (1) was determined [orthorhombic, space group Pbcm, a= 11.530(5), b= 18.745(9), c= 7.889(4)Å, and Z= 4] and refined to R= 0.040 and R′= 0.038. All the atoms except those of four axial CO ligands and some hydrogens lie in one plane.