resonance effect on νCO was found to be important in the case of +Rpara substituents in the benzoyl part of phenyl benzoates as well. The carbonyl stretching frequencies of ortho derivatives in phenoxy part were shown to correlate with the inductive substituent constant σI only. In the benzoyl part of the esters the carbonyl stretching frequencies of cis and trans conformers (relative to the carbonyl group)
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苯甲酸的C 25周取代的苯基的酯红外光谱6 ħ 5 CO 2 C ^ 6 ħ 4 -X(X H,3-
氯,3-F,3-CN,3-NO 2,3-CH 3,3- OH,3-NH 2,4-CL,4-F,4-NO 2,4-CN,4-OCH 3,4-CH 3,4-NH 2,2-
氯,2-F,2-I ,2-NO 2,2-CF 3,2-CN,2-CH 3, 2-OCH 3,2-N(CH 3)2,2-C(CH 3)3),8烷基
苯甲酸酯ç 6 ħ 5CO 2 R(X CH 3,CH 2 CH 3,CH 2 Cl,CH 2 CN,CH 2 C CH,CH 2 CH 2 Cl,CH 2 CH 2 OCH 3,CH 2 C 6 H 5)和22苯基取代的
苯甲酸XC的酯6 ħ 4 CO 2 C ^ 6 ħ 5(X 3-CL,3-NO 2,3-CH 3, 3-N(CH 3)2,4-F,4-CL,4-
溴,4- NO 2,4-CH