Reaction of naphthalene with Na/K alloy and [(2,6-diisopro-dimethyl-2,4-hexadiene with dichloro(diisopropy1amino)borpylphenyl)methylamino]difluoroborane (1) in 1,Zdimethoxy-ane to Na/K alloy in hexane the 2,4,5triborabicycloethane yields the aminodimethoxyborane 2, the bis(amino)-[l.l.l]pentane 7 and the diboretane 8, resp., are obtained. 'H-, borane 3, the diborylethyne 4, and the diboryl oxide 5. By "B-, 13C-, "F-, *'Si-NMR-, IR, and MS data are given. For 2-4, addition of a mixture of bis(trimethylsily1)butadiyne or 2,5-7 and 8 X-ray structure analyses are performed.

1992organo-boron compounds, nonmetal heterocycles organo-boron compounds, nonmetal heterocycles S 0047 -203Dehalogenation of Aminodihalogenoboranes by Na/K Alloy in the Presence of Naphthalene, Bis(trimethylsilyl)butadiyne, and 2,5-Dimethyl-2,4-hexadiene.-The products of the title dehalogenation reactions are characterized by X-ray structure analyses. -(MARINGGELE, W.; KNOP, H.; BROMM, D.; MELLER, A.; DIELKUS, S.; HERBST-IRMER, R.; SHELDRICK, G. M.; Chem.