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85037486267
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Benzaldehyde hydrazone was prepared by reaction of benzaldehyde and hydrazine monohydrate in ethanol and purified by successive distillations under reduced pressure over calcium hydride: yield 88%; bp 107-110 °C (0.5 mmHg). IR (neat): 3331 (N-H), 1597 cm-1 (C=N). 'H NMR (270 MHz, CDC13): 6 5.62 (s, 2H, NH2), 7.37 (m, 3H, para and meta), 7.58 (dd, 2H, J = 8.9, 1, 7 Hz, ortho), 7.69 (s, 1H, CH=N). 13C NMR (67.9 MHz, CDC13): δ 125.6 (meta), 127.9 (ortho), 128.1 (para), 134.8 (ipso), 150.0 (C=N).
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Benzaldehyde hydrazone was prepared by reaction of benzaldehyde and hydrazine monohydrate in ethanol and purified by successive distillations under reduced pressure over calcium hydride: yield 88%; bp 107-110 °C (0.5 mmHg). IR (neat): 3331 (N-H), 1597 cm-1 (C=N). 'H NMR (270 MHz, CDC13): 6 5.62 (s, 2H, NH2), 7.37 (m, 3H, para and meta), 7.58 (dd, 2H, J = 8.9, 1, 7 Hz, ortho), 7.69 (s, 1H, CH=N). 13C NMR (67.9 MHz, CDC13): δ 125.6 (meta), 127.9 (ortho), 128.1 (para), 134.8 (ipso), 150.0 (C=N).
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85037467401
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Pale yellow crystalline product: IR(KBr): 1650 (C=N), 1600 (aromatic C=C), 1500 (aromatic C=C), 1160 (C-N), 755 (aromatic C-H), 690 cm-1 (aromatic C-H). 1H NMR (270 MHz, CDCls): ô7.46 (m, 3H, ortho and para), 7.87 (dd, 2H, J = 8.0, 3.0 Hz, meta), 8.68 (s, 1H, methine). Colorless powder: IR (KBr): 1646 (C=N), 1586 (N=N), 1500 (aromatic C=C), 1194 cm-1 (C-N).
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Pale yellow crystalline product: IR(KBr): 1650 (C=N), 1600 (aromatic C=C), 1500 (aromatic C=C), 1160 (C-N), 755 (aromatic C-H), 690 cm-1 (aromatic C-H). 1H NMR (270 MHz, CDCls): ô7.46 (m, 3H, ortho and para), 7.87 (dd, 2H, J = 8.0, 3.0 Hz, meta), 8.68 (s, 1H, methine). Colorless powder: IR (KBr): 1646 (C=N), 1586 (N=N), 1500 (aromatic C=C), 1194 cm-1 (C-N).
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33745568091
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85037478854
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+] Calcd 396. Found 396.
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+] Calcd 396. Found 396.
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29
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0022929377
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Kitayama, T.5
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