consideration of the factors influencing the specific rates of solvolysis of p-methoxyphenyl chloroformate考虑的影响因素的具体的溶剂分解率p-methoxyphenyl氯甲酸酯.pdfVIP

Int. J. Mol. Sci. 2007, 8,788-796 International Journal of Molecular Sciences ISSN 1422-0067 © 2007 by MDPI /ijms Full Research Paper Consideration of the Factors Influencing the Specific Rates of Solvolysis ofp -Methoxyphenyl Chloroformate Malcolm J. D’Souza 1,*, Darneisha Reed 1, Fumie Koyoshi 1 and Dennis N. Kevill 2,* 1 Department of Chemistry, Wesley College, 120 N. State Street, Dover, Delaware 19901-3875, USA 2 Department of Chemistry and Biochemistry, Northern Illinois University, DeKalb, Illinois 601152862, USA * Authors to whom correspondence should be addressed; E-mail: dsouzama@; E-mail: dkevill@ Received: 23 July 2007 / Accepted: 2 August 2007 / Published: 9 August 2007 Abstract: A recent correlations analysis of the specific rates of solvolysis of p - methoxyphenyl chloroformate (1) in 31 solvents using the three-term Grunwald-Winstein equation led to a sensitivity (h) towards changes in the aromatic ring parameter (I) of 0.85 + 0.15. This value, suggesting an appreciable contribution from the hI term, is in contrast to the h value of 0.35 + 0.19 that was reported for the parent phenyl chloroformate (2). However, for 1, only two specific rate values were available for the important fluoroalcohol containing solvents. Values are now reported for 13 additional solvents, 12 of which have appreciable fluoroalcohol cont