124665-19-6Relevant articles and documents
Contributions to the Chemistry of Boron. Part 194. Synthesis and Characterization of Mono, Bi-, and Tri-cyclic Boron-Nitrogen-Sulphur Ring Systems. Crystal Structure of 2,7,9,14-Tetrakis(diethylamino)-3,5,6,10,12,13-hexathia-1,8-diaza-2,4,7,9,11,14-hexaboratricyclo4,8> tetra...
Kendrick, Aidan,Noeth, Heinrich,Stalla, Beate,Storch, Wolfgang
, p. 1311 - 1320 (2007/10/02)
Reactions of the triborylamines N(BX2)3 (X = Cl or Br) with bis(dimethylboryl)disulphane (2) proceed via 4-dihalogenoboryl-3,5-dihalogeno-1,2,4,3,5-dithiazadiborolidines (3) to 2,8-dihalogeno-3,4,6,7-tetrathia-1-aza-2,5,8-triborabicyclo1,5> octanes (4a) and (4b).The bromo derivative (4b) reacts with additional (2) (1:1 molar ratio) to procedure impure NB3S6, but with an excess of (2) to yield a tricyclic system NB4S6(CH3).The halogen atoms in (4a) and (4b) can be substituted by methyl groups from Sn(CH3)4 as the methylating agent.Amination of compound (4a) with Sn(CH3)3 seems to proceed via the bis(diethylamino)derivative, but a new triclinic system (8) is the final product the structure of which has been determined by X-ray crystallography.U.v. and He I photoelectron spectra support n.m.r. evidence that the bicyclic rings (4) are planar 10?-electron systems.This conclusion is supported by MNDO and PPP calculations.
