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The reaction kinetics between MoO2 (S2CNEt2)2 and triphenylphos-phine (PPh3) were studied in various organic solvents with the aid of the stopped-flow technique. The linear correlations were found for rate constants or activation energy versus the function of refractive index (n2 - 1)/(2n2 + 1). It was also found that pre-factor increases with the descent of ( n2 - l)/(2n2 - 1) slightly.One step mechanism which supposes the lone pair of electrons on P atom of triphenylphosphine enters directly into the Ⅱ antibonding orbital, which makes the Mo= O bond broken, is suggested.
The reaction kinetics between MoO2 (S2CNEt2) 2 and triphenylphos-phine (PPh3) were studied in various organic solvents with the aid of the stopped-flow technique. The linear correlations were found for rate constants or activation energy versus the function of refractive index ( It was also found that pre-factor increases with the descent of (n2-1) / (2n2-1) slightly. One step mechanism which supposes the lone pair of electrons on P atom of triphenylphosphine enters directly into the II antibonding orbital, which makes the Mo = O bond broken, is suggested.