Silica Sulfuric Acid
2495
1
56.60 (COO-), 154.40 (C O), 148.20, 134.10, 130.11, 124.71, 118.20 (C
aromatic ring), 117.90, 116.00 (C vinilic).
3b) FT-IR: KBr (υmax, cm−1) 3420, (OH acid), 3050 (CH aromatic)
912 (CH vinilic) 1754 (C O ester), 1673 (C O acid), 1607, 1565 (C C);
(
2
1
HNMR (DMSO-d6), δ : 13.2 (s, broad, H acid), 8.69 (s, 1H aromatic),
7
.3 (m, 3H aromatic), 3.91 (s, O CH3). 13CNMR (DMSO-d6), δ : 164.23
(
1
5
COOH), 156.37 (COO-), 148 (C OCH3), 146.74 (COC O), 144.14,
31.67, 125.82, 121.32 (C aromatic ring), 118.57, 116.21 (C vinilic),
6.09 (O CH3).
(
3c) FT-IR: KBr (υmax, cm−1): 3421 (OH acid), 3044 (CH aromatic),
2
986 (CH vinilic), 1735 (C O ester), 1690 (C O acid), 1617, 1559
1
(
(
C C aromatic); HNMR (DMSO-d6), δ : 12.99 (broad, s, COOH), 8.72
H aromatic), 7.81 (H vinilic), 7.06, 6.18 (H aromatic), 3.74 (OCH3);
1
3
CNMR: 164.60 (COOH), 164.08 (COO-), 157.17 (C OCH3), 156.80
C O), 149.01, 131.50 (C aromatic), 113.76, 113.20 (C vinilic), 111.56,
(
1
00.02 (C aromatic), 57.00 (OCH3).
3d) FT-IR: KBr (υmax, cm−1): 3447 (OH acid), 3052 (CH aromatic),
952 (CH vinilic), 1755 (C O ester), 1686 (C O acid), 1621, 1574 (C C).
(
2
1
H NMR (DMSO-d6), δ : 13.20 (H acid), 8.65 (s, H vinilic), 7.40–7.37 (m, 3
1
3
H, aromatic), 7.34 (1H aromatic), 3.79 (s, OCH3). CNMR (DMSO-d6),
δ : 164.40 (COOH), 157.40 (OC O), 156.10 (C OCH3), 149.30 (C O),
1
(
48.40, 122.40 (C aromatic), 119.10, 118.80 (C vinilic), 117.60, 112.20
C aromatic), 56.20 (OCH3).
3e) FT-IR: KBr (υmax, cm−1): 3450 (OH acid), 3096 (CH aromatic),
949 (CH vinilic), 1742 (C O ester), 1695 (C O acid), 1617, 1569 (C C).
(
2
1
H NMR (DMSO-d6), δ : 13.3 (H acid) 8.80, 8.50 (H aromatic), 7.64 (H
vinilic), 7.61 (H aromatic); 13CNMR (DMSO-d6): 163.56 (COOH), 157.99
(
1
OC O), 155.38 (C O), 147.02 (C-NO2), 133.50, 128.20 (C aromatic),
25.80, 120.20 (C vinilic), 118.30, 117.60 (C aromatic).
−1
(
3f) FT-IR: KBr (υmax, cm ): 3440 (OH acid), 3044 (CH aromatic),
2
950 (CH vinilic), 1756 (C O ester), 1690 (C O acid), 1600, 1558 (C C).
1
H NMR (DMSO-d6), δ : 11.50 (Hacid), 8.64, 8.12 (H aromatic); 7.85
(
H vinilic); 7.39 (H aromatic). 13CNMR (DMSO-d6): 164.20 (COOH),
1
56.50 (OC O), 153.90 (O C), 147.02, 136.70, 132.30, 120.30, 120.20
(C aromatic), 118.80, 116.60 (C vinilic).
−1
(
3g) FT-IR: KBr (υmax, cm ): 3421 (OH acid), 3056 (CH aromatic),
1
1747 (C O ester), 1681 (C O acid), 1597, 1569 (C C). H NMR (DMSO-
d6), δ : 13.30 (H acid), 9.36, 8.60, 8.32 (d J = 9.3), 8.25 (d J = 9.3), 8.01 (d J
9.3), 7.91 (t, H aromatic), 7.61 (H vinilic). 13CNMR (DMSO-d6): 164.70
COOH), 157.20 (OC O), 155.50 (C O), 144.02, 136.20 (C aromatic),
30.30 (C vinilic), 129.54, 129.48, 129.46, 126.89 (C aromatic), 122.80
C vinilic), 117.80, 116.90, 112.60 (C aromatic).
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1
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