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Table 2 Assignment of vibrational modes of compounds 8a-l

From: Single-step synthesis of a new series of meso di-Mannich bases from the cyclic aminal (2S,7R,11S,16R)-1,8,10,17-tetraazapentacyclo[8.8.1.1.8,170.2,7011,16]icosane and p-substituted phenols

Product 1 2 3 4 5 6 7 8 9
8a 3050 2848 1630 1448 1387 1194 1289 1063 772
1495 1124 737
8b 3053 2922 1605 1444 1385 1170 1272 1069 764
2850 1480 1069 680
8c 3054 2933 1636 1444 1384 1169 1283 1071 761
2849 1476 1112 673
8d 3070 2931 1603 1440 1367 1179 1262 1039 764
2854 1476 1129
8e 3042 2928 1609 1449 1384 1190 1293 1097 791
2854 1497 1110 771
8f 3040 2980 1612 1452 1384 1178 1285 1098 840
2931 1495 1124 1058 770
2857
8 g 3049 2932 1613 1448 1384 1178 1270 1037 840
2875 1497 1127 771
8 h 3056 2961 1613 1449 1383 1177 1258 1059 874
2931 1497 1127 770
2858
8i 3037 2946 1618 1469 1393 1096 1243 1070 742
2913 1486
2874
8j 3060 2962 1613 1449 1394 1117 1259 1067 817
2934 773
2862
8 k 3060 2962 1613 1449 1394 1122 1252 1068 857
2934 1502 824
2862
8 l 3051 2962 1617 1465 1384 1068 1289 1039 820
   2923 1497       775
   2850        
  1. Vibrational modes: 1) Stretching frequency of O-H bonds, 2) Stretching frequency of the C sp3 -H bonds, 3) symmetric and asymmetric stretching frequency of the C-C bond, 4) Flexion frequency of the C-H bond in aromatic rings, 5) out of plane flexion frequency of methylene groups, 6) Stretching frequency of the C-N bonds, 7) Stretching frequency of the C-O bonds, 8) in the plane deformation of the C-H bonds in aromatic rings, 9) out of plane deformation of the C-H bonds in aromatic rings.
  2. Table 2 shows the measured vibrational modes of compounds 8a-l, obtained using FT-IR spectroscopy.