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Purification of Laboratory Chemicals, 8th Edition by W.L.F. Armarego

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1-(1-Naphthyl)ethylamine [R-(+)- 3886-70-2, S-(-)- 10420-89-0] C12H13N, M 171.2, b 153°/11mm, 178-181°/20mm, d420 1.067, nD20 1.624, [α]54620 (+) and (-) 65, [α]D20 (+) and (-) 55 (c 2, MeOH), [α]D17 (+) and (-) 82.8 (neat), pKEst ~ 9.3. Purify the amine by distillation in a good vacuum. [Mori et al. Tetrahedron 37 1343 1981, DOI: 10.1016/S0040-4020(01)92450-0, cf. Wilson in Topics Stereochem (Allinger and Eliel eds) vol 6 135 1971, Fredga et al. Acta Chem Scand 11 1609 1957, DOI: 10.3891/acta.chem.scand.11-1609]. The hydrochlorides crystallise from H2O [α]D18 ± 3.9 (c 3, H2O), and the sulfates recrystallise from H2O as tetrahydrates m 230-232°. The RS-amine [42882-31-5] has b 153°/11mm, 156°/15mm, 183.5°/41mm [Blicke & Maxwell J Am Chem Soc ...

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