Study of the reaction of MoOS 2 (S 2 CNR 2 ) 2 with PPh 3 in 1,2‐dichloroethane: Part I. Kinetics of the teaction of MoOS 2 (S 2 CNR 2 ) 2 with triphenylphosphine PPh 3

The kinetics of the reaction of MoOS 2 (S 2 CNR 2 ) 2 (R = CH 3 , C 2 H 5 , n ‐C 3 H 7 ) with PPh 3 have been studied using a Stopped‐flow method. It was found that these MoOS 2 (S 2 CNR 2 ) 2 complexes react with PPh 3 in the form of an irreversible second‐order reaction. The rate constants at 25°C are respectively 48.4, 23.8, and 20.8 mol −1 dm 3 s −1 and the activation energies are 4.8, 4.9, and 5.0 Kcal/mol with R = CH 3 , C 2 H 5 , and n ‐C 3 H 7 .