Data sheet -

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Useful Analytical Data Atomic mass and natural abundances of Degrees of unsaturation formula: common isotopes in organic molecules 12 13 C 98.89% C 1.11% 1 2 H 99.99% H 0.01% 14 15 N 99.64% N 0.36% 16 18 O 99.76% O 0.20% 35 37 Cl 75.77% Cl 24.23% 79 81 Br 50.69% Br 49.31% 19 F 100% 32 34 S 95.0% S 4.22% 127 I 100% Significant IR Absorptions O–H 3600–3200 cm–1 strong, broad N–H 3500–3200 cm–1 medium C–H ~3000 cm–1 Csp3–H 3000–2850 cm–1 medium/strong Csp2–H 3150–3000 cm–1 medium Csp–H 3300 cm–1 medium C≡C 2250 cm–1 (medium) medium C≡N 2250 cm–1 (medium) medium C=O 1800–1650 cm–1 (often ~1700 cm–1) strong C=C 1650 cm–1 medium 1600, 1500 cm–1 medium Key NMR Regions C NH and C OH 1H NMR C C H H O O O Z C H C H C C H C OH C H C C C H (Z = O, N, halogen) C 12.0 10.5 9.0 8.0 6.5 4.5 2.5 1.5 0 13C NMR aromatic (benzene) C–X (alkyl) O O R R R X C C (alkene) C C C–C (alkyl) 220 200 180 160 140 120 100 80 60 40 20 0