3.4.22.14 acetonitrile stopped-flow spectral analysis of increasing content of co-solvent acetonitrile on kinetics. With low acetonitrile content, plots of reaction are linear, increasing the acetonitrile content results in marked deviations of the plots from linearity with a rate minimum around [S]0 of 0.15 mM 667472 3.4.22.14 dimethyl sulfoxide comparison of effect on reaction kinetics with acetonitrile 667472