potassium-sodium in pentane byproducts: KCl; reflux under N2 for 3 h; sepn. of KCl, evapn. of pentane, fractional distn. at 99-103°C/1 Torr, crystn. at -50°C from pentane;
N(C2H5)3 in hexane byproducts: ((C2H5)3NH)Cl; under N2, addn. of both amines in hexane to a stirred hexane soln. of B-compd. at -30°C, refluxed for 17 h; centrifugation, hexane evapd., fractional distn.;
