“…41,42 An alternative method to symmetric dialkyl phosphonates 32 was reported by Shreibert et al. 43 The reaction of l,l-bis(fer£-butylperoxy)ethane could not be analyzed quantitatively for their "active" oxygen content and thus were characterized through their derivatives, i.e., their dibutyl phosphonate ester 40 and the bromomethoxy derivative 41. Subse- quently,41 the class of compounds 32 was expanded to include the unsaturated phosphonates containing the peroxy moiety shown in Table III.…”