Prepd by the action of PBr3 on sec-octyl alcohol: Hsueh, Marvel, J. Am. Chem. Soc. 50, 856 (1928); Reynolds, Adkins, ibid. 51, 279 (1929); Shriner, Young, ibid. 52, 3332 (1930); Ellis, Reid, ibid. 54, 1680 (1932); E. J. Coulson et al., J. Chem. Soc. 1965, 2364. Review of synthesis of optically active alkyl halides: H. R. Hudson, Synthesis 1, 112-119 (1969).