Abstract
Abstract Rate data for the reaction of (3,6-dithiaoctane)tetracarbonylchromium(0) with triethyl phosphite and tri(isopropyl) phosphite in 1,2-dichloroethane support a ring-opening mechanism. The data support rapid ring-reclosure relative to attack by the phosphite at the ‘ring-opened’ five-coordinate intermediate; these relative rates are correlated to a lack of distortion in the (dto)Cr(CO)4 substrate, and are contrasted to kinetics results for substrates in which significant distortion is observed.
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