Ultimate Work Authority Section

The management of an emergency during drilling can be problematic because there are often multiple vessels in a small area, and it is not always clear as to who is in overall control. This dilemma has led to difficulties in implementing the Ultimate Work Authority section of the SEMS rule (Chapter 5). 

Pulsed-laser studies with W(CO)jL (L = pyridine or piperidine) have essentially confirmed the earlier observations. This work also showed that a solvent complex is formed within 10 ps of the laser flash and this "intermediate" is the ultimate source of the substitution products. These authors also reported that if 1-hexene is the entering ligand, then the first product has W(CO>5 complexed to the "alkyl portion" of the hexene and this species rearranges in about 10 ns to the T -hexene product. These observations may be relevant to those of Stoutland and Bergman on the addition of ethylene to Ir(Cp )(PMe3) discussed in Section 5.5. 

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