Question

Comparison of the first IR (phosohonium salt reagent) with the second IR (ylid product)

ozet IN 4 Synthesis of a studiezed yeech : Php Am 36767 30629 2898.5 2993 07051 %R 108 Stem-1 13701 7399 527 11cm-1 754 en-1 1328 on loon 22 T omosoom: 692 12em-1 Sam 4000 3500 3000 2500 2000 1500 1000 IR c Aph3 ~ CODEC. %R 7241 75285 17011 cort 3500 3000 2500 2000 1500 1000 500

Answer 1

3676 cm^{-1 shows the absorption frequency for =P group and 3062 cm-1 is for =C-H bond in phosphorous ylid.}

^{But these two bonds are absent in phosphonium salt so there absorption also can't seen in first graph.}