1064704-42-2Relevant articles and documents
N-(2,4,6-trimethylborazinyl)-substituted phosphanes, arsanes, and stibanes
Noeth, Heinrich,Gemuend, Birgit,Paine, Robert T.
, p. 4282 - 4297 (2007)
Reaction of the N-lithioborazine LiH2N3B 3Me3·OEt2 (2) in di ethyl ether with PCl3 or PBr3 leads to the borazinylphosphanes (Me 3B3N3H2)PX2, (Me 3B3N3H2)2PX (X = Cl, Br), and (Me3B3N3H2)3P, depending on the initial stoichiometry. The analogous arsane and stibane derivatives were obtained in a similar manner. While (Me3B 3N3H2)2PBr is reduced by LiAlH 4 in diethyl ether/hexane to give the monophosphane (Me 3B3N3H2)2PH (13), the reaction of (Me3B3N3H2)PBr 2 (5) with LiAlH4 in diethyl ether/hexane produces the zwitter-ionic compound [Me3B3N2(HN)] -P+H2Et (14). Dehalogenation of (Me 3B3N3H2)2PBr (6) with Na yields the diphosphane (Me3B3N3H 2)2PP(H2N3B3Me 3)2 (18), while the mixed diphosphane (Me 3B3N3H)2PPmes2 (17) is obtained from 6 and LiPmes2. Dehalogenation of Me3B 3N3H2PBr2 with Na results in the exclusive formation of (Me3B3N3H 2)4P4 (19), while the reaction of 5 with Li2Pmes leads to a mixture of cyclotetraphosphanes (mes) 4-n(Me3B3N3H2) nP4 (A-F) along with bicyclic P4mes 2. The new compounds have been characterized by NMR and IR spectroscopy and partly by mass spectrometry. X-ray structures for compounds, 4, 5, 6, 9, 13, 14, 17, 18, 19, and E have been determined. All show different B-N bond lengths within the borazine rings, and some have borazine rings in a half-chair conformation. Wiley-VCH Verlag GmbH & Co. KGaA, 2007.
