Question

#10) The kinetics of the following reductive elimination of biphenyls from Pt(ll) diphosphine complexes was investigated. The table below shows some of the results: Ar Ar P Ph PhẸPh + PdLn d®-toluene, 100°C Ph Ar Ar Ph 7.8 Ar Group kls 1) 1.8 x 10-7 4-F-C6H4 4.7 x 107 2,6-F2-C6H3 3.6 x 105 2,4,6-F3-C6H2 6.9 x 10-6 | CGFs 2.2 x 104 AH* (kcal/mol) AS* (cal/mol K) 11.5 37.2 11.8 31.7 1.1 30.9 0.1 28.7 1.4 Explain what the results listed in the table indicate about the mechanism of the reaction. What is the nature of the transition state in the rate-determining step?

Answer 1

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