The IR absorption at . 8 and 97. cm - of PPA are originated from two carboxy CO because of its gem-diol structure, and the absorption at 70. and 78. cm - in BPPA is assignable to keto CO and carboxy CO, respectively.
The IR absorption at . 8 and 97. cm - of PPA are originated from two carboxy CO because of its gem-diol structure, and the absorption at 70. and 78. cm - in BPPA is assignable to keto CO and carboxy CO, respectively.
IR光谱中 ,PPA由于采取烯醇式二聚体结构 ,在 8和 97 cm- 处分别出现两个羧基CO峰 ,BPPA则在 70 cm- 和 7 8 cm- 处分别出现酮基CO和羧基CO吸收峰。