Observed frequencies (in cm-1) Calculated frequencies (in cm-1) IR intensity Raman intensity PED(%)
Unscaled frequencies Scaled frequencies
- - 21  20 0.3095  3.3950   τHOAsC(92)
- 72 83   80 1.3174  3.2423   τring(44),δAsCCC(35), δOCOAs(15)
- 101 102 97 3.0357 0.9722 δAsCC(43),δOCOAs(20), βOAsO(11)
- 130 142  136 44.0230    1.9336   δOAsO(39),τHOAsC(36), βAsCC(11)
- - 177   169 4.0025 0.2230   δOCOAs(26), τring(22)
- 192 228 218 21.8340 1.5824 τHOAsC(39), δOAsO(27)
- 241 233  223 23.5420 9.8303   νAsC(35),βOAsO(29)
- - 282               269 25.0923 1.2246   δOCOAs(44),βOAsO(13),τHOAsC(11)
- - 295 282 31.7708 1.5450 βOAsO(43), τHOAsC(24)
- - 334               319 117.3647              2.8311   βOAsO(54), νAsC(13)
- - 349               334 104.0826   1.3573   τHOAsC(28), δAsCCC(14)
- - 352 337 54.6721 0.9138 δOCOAs(28) δAsCCC(14)
- - 354              339 7.7920   0.1847   τHNCC(83)
- 362 406               388 0.2051               1.0149   βNCC(64), βAsCC(10)
- 401 435 416 330.4568 8.7377 βHNCC(83)
- 415 436               417 1.4405 0.0717   τring(79),τNCCC(10)
516 - 537               514 16.2490   0.5584   βring(54), τHOAsC(17)
610 - 619 592 2.7211 4.5056 βring(54), νAsC(23)
616 613 649               620 1.6575               5.4753 βring(79)
636 634 681               651 130.2023               24.6207 νAsO(93)
- - 701 670 130.6002 15.7532 νAsO(94)
744 726 773               739 0.2750 0.1604 τring(48), τNCCC(22)
- - 835               799 14.0495   25.8755   νCC(28), τHCCN(22), νCN(13)
- 808 838 801 2.1537 8.1850 τHCCN(63), τHCCC(11)
826 830 848  810 47.5682 3.2203 τHCCN(57), τHCCC(14)
- - 971   928 41.1559 18.3490   νAsO(74) ,βHOAs(18)
    992 948 111.4965 1.9601 βHOAs(95)
975  - 1009   965 138.4029   1.9005   βHOAs(57), νAsO(19)
976 - 1014   970 7.0007 0.0720   τHCCC(51), τHCCN(20), τring(12)
- - 1025 980 18.6809 7.2956 βHCC(40), νCC(22)
- - 1037              992 0.5479   0.1766   τHCCC(56), τHCCN(20), τring(18)
1019 1012 1071              1024 0.4095 0.4537 βHNC(62), νCC(22)
1096 1094 1115 1066 75.6260 33.3023 νCC(49), νCAs(16)
- - 1156              1105 3.5097 0.5701   βHCC(47), νCC(27)
1140 - 1215              1162 39.2371               5.9179   βHCC(72)
1234 - 1328 1269 101.4780 7.8833 νCN(51)
- 1289 1341              1282 10.4023   1.1439   νCC(39), βHCC(33)
1326 - 1372              1312 1.1265   0.3068   βHCC(24)νCC(23), βHCN(14)
1414 - 1465 1400 6.2808 0.2752 νCC(40), βHCC(31)
1474 - 1545              1477 58.6103   3.1089   βHCC(53)
- - 1613              1542 9.2024 1.2640 νCC(71)
1571 - 1647 1575 72.1447 49.1366 νCC(37), βHNH(20)
1602 1594 1670             1596 265.0262 48.4841 βHNH(68)
2820 - 3182 3042 11.7466 100.3993 νCH(91)
2905 2993 3183 3043 11.7947 91.5474 νCH(98)
3033 3061 3206              3065 4.7684   86.0142               νCH(99)
- 3150 3210              3069 3.5663 102.8208               νCH(92)
3405 - 3595 3437 52.4562 263.5943 νNH(100)
- 3482 3709              3506 26.5557               64.5784 νNH(100)
- 3603 3799              3633 101.1245 89.7011               νOH(99)
- - 3805 3638 99.7559 227.7897 νOH(99)
ν – Stretching, β – bending, δ –out of plane, τ – torsion, PED- Potential Energy Distribution.
Table 3: Observed and B3LYP/6-31+G**level calculated vibrational frequencies (in cm-1 ) of p-Arsanilic acid.