ChemInform Abstract: Synthesis and Molecular and Crystal Structure of a New Tricyclic B3N4S2Si2 System.

Abstract

235ChemInform Abstract The difunctional disilyl derivative (I) reacts with the diaminoborane(II) to give the tricyclic title system (III). A stabilizing, coordinative interaction between sulfur and boron is presumably the reason forthe unexpected formation of this compound. The structure of (III) is established by X-ray crystallography (space group P212121, Z=4) and 1H, 13C, 14N, and 29Si NMR spectroscopy.

Trithia-diborinane and Bis(bridging-boryl) Complexes of Ruthenium Derived from a [BH3(SCHS)]− Ion

“…12 Meller et al reported the first transitionmetal−diborinane adduct in 1986, [(BMe) 2 (NH){N-(SiMe 3 )} 2 (S){W(CO) 5 }]. 13 Recently, Braunschweig et al reported bis(cAAC)-stabilized 3,6-dicyano-1,2,4,5-tetrasulfa-3,6-diborinane where the central {B 2 S 4 } ring displays boat conformation and this was the first example of structurally and NMR-spectroscopically characterized {B 2 S 4 }-heterocycle. 14 Selected examples of the structurally characterized diborinane derivatives are listed in Table 1, and it is clear that the tetracoordinated boron atoms in the diborinane species are more shielded and appear in the upfield region as compared to the tricoordinated boron atoms.…”