The catalytic ring-opening cyclooligoraerization (ROC) of by the complexes M(CO)5L (M = Cr and W; L = CO, and 1,5,9-trithiacyclododecane)

Article abstract of DOI:10.1002/cber.19961290311

The following four compounds have been synthesized: M(CO)₅L (3 and 4, where M= Cr and W, and L = SCH₂CH₂CH₂), W(CO)₅(12S3) (5, where 12S3 = 1,5,9-trithiacyclododecane), and [W(CO)₅]₂(12S3) (6). The molecular structures of 4 and 5 were established by single-crystal X-ray diffraction analyses. Both compounds contain a W(CO)₅ group coordinated to one of the sulfur atoms of the heterocycle. The ability of the compounds M(CO)₆, 1 and 2 (M= Cr and W), and 3-5 to catalytically produce ring opening cyclooligomerization JROC) of thietane into 12S3 and 24S6, (2486= 1,5,9,13,17,21-hexathiacyclotetracosane) has been investigated. Compounds 1-3 have relatively low activity. Compounds 4 and 5 have the highest activity and selectivity for 12S3 formation. Crystal Data for 4: space group = P2₁2₁2₁, a = 12.906(2) A, b = 13.730(4) A, c = 6.427(1) A, Z = 4, 1306 reflections, R - 0.033; for 5: space group = P1, a = 12.703(1) A, b = 13.510(2) A, c = 5.833(1) A, α = 101.75(1)°, β = 97.54(1)°, γ = 101.70(1)°, Z = 2, 2225 reflections, R = 0.023. VCH Verlagsgesellschaft mbH. 1996.