The Isolation of a Large Cyclopentadienylcobaltsulfide Cluster. The Synthesis and Crystal Structure of Octahedral closo-(η5-C5H5Co)5S

Abstract

The title cluster, which was obtained serendipitously when (g 5-C 5 H 5) Co(PPh 3) 2 was added to a (g 5-C 5 H 5)Co metallacyclobutene containing a sulfone group, is the largest cluster known, formed primarily with (g 5-C 5 H 5)Co vertices. The closo-(g 5-C 5 H 5 Co) 5 S is a closed-shell, octahedral cluster which forms black, monoclinic crystals from methanol.

Metal-Alkyne and Metallacyclobutene Reactivity toward a Diazoacetamide: Conversion to Highly Functionalized 1,3-Diene Complexes and Oxametallacyclopentadienes

“…Furthermore, in solution, the alkyne complexes 1 - TMS and 1 - TIPS decomposed upon exposure to air, and the reaction of 1 - TMS with 7 in 18 OH 2 -saturated C 6 D 6 resulted in decomposition of 1 - TMS , with no formation of 8 - TMS or 12 An alternative source for the oxygen in byproduct 12 is the sulfone group of an organometallic complex (e.g., 1 - TMS ), or an organic compound such as TMSCCSO 2 Ph Scheme provides a mechanism for incorporation of a sulfone oxygen into the CO ligand of 12 .…”