Second moment order reaction scheme

Fig. 22 Reaction scheme for CVD synthsis of polyazomethine with second-order nonlinear properties. The possible dipole moment is shown. ...

The reaction of [Fe(CO)2(PMe3)2(Me)(CN)J with CO to form [Fe(C0)2(PMe3)2 C(0)Me (CN)] is second order in some solvents, but the solvent effect upon the kinetics and equilibrium constants is small. The solvent effect is attributed to a small interaction between the intermediate and solvent and the small change in dipole moment during the reaction. The mechanism is shown in Scheme 23. The lower path is favored. Selected values of /c = kj/[CO], where k, is the first-order rate constant for relaxation to equilibrium, are reported in Table... 

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