[H(OEt<sub>2</sub>)<sub>2</sub>]<sup>+</sup> and [Ph<sub>3</sub>C]<sup>+</sup> Salts of the Borate Anions [B(CF<sub>3</sub>)<sub>4</sub>]<sup>-</sup>, [(CF<sub>3</sub>)<sub>3</sub>BCN]<sup>-</sup>, and [B(CN)<sub>4</sub>]<sup>-</sup>
作者:Maik Finze、Eduard Bernhardt、Michael Berkei、Helge Willner、Joyce Hung、Robert M. Waymouth
DOI:10.1021/om050463j
日期:2005.10.1
with K[B(CF3)4] in diethyl ether gave the oxonium acid [H(OEt2)2][B(CF3)4] as a stable salt at room temperature. Syntheses of [Ph3C][B(CF3)4] and [Ph3C][(CF3)3BCN] were accomplished from the corresponding potassium salts and Ph3CCl. The metathesis reaction of Ag[B(CN)4] with trityl bromide resulted in formation of [Ph3C][B(CN)4]. Treatment of Cp2ZrMe2 with [H(OEt2)2][B(CF3)4], [Ph3C][B(CF3)4], [Ph3C][(CF3)3BCN]
(PPh<sub>3</sub>)<sub>3</sub>RhCNB(CF<sub>3</sub>)<sub>3</sub> and (PPh<sub>3</sub>)<sub>3</sub>RhNCB(CF<sub>3</sub>)<sub>3</sub>: Isocyano- and Cyanoborate Complexes of Tris(triphenylphosphine)rhodium(I)
作者:Maik Finze、Eduard Bernhardt、Helge Willner、Christian W. Lehmann
DOI:10.1021/om060135z
日期:2006.6.1
The reactions of K[(CF3)(3)BNC] and K[(CF3)(3)BCN] with (PPh3)(3)RhCl in ethanol resulted in the rhodium(I) complexes (PPh3)(3)RhNCB(CF3)(3) and (PPh3)(3)RhCNB(CF3)(3), respectively. Their N-15-labeled isotopomers were synthesized from the corresponding borate anions. The complexes were characterized by UV, Raman, and multi-NMR spectroscopy, and the crystal structures were obtained. The spectroscopic and structural data are compared to those of the potassium borates and to related rhodium(I) complexes.
Cyano- and Isocyanotris(trifluoromethyl)borates: Syntheses, Spectroscopic Properties, and Solid State Structures of K[(CF<sub>3</sub>)<sub>3</sub>BCN] and K[(CF<sub>3</sub>)<sub>3</sub>BNC]
作者:Maik Finze、Eduard Bernhardt、Helge Willner、Christian W. Lehmann
DOI:10.1021/ja0516357
日期:2005.8.1
A two step synthesis to the isocyanotris(trifluoromethyl)borate anion, [(CF3)3BNC]-, and its isomerization to the cyanotris(trifluoromethyl)borate anion, [(CF3)3BCN]-, at temperatures above 150 degrees C are presented. In the first step (CF3)3BNCH was obtained by reacting (CF3)3BCO with hydrogen cyanide followed by deprotonation of the HCN adduct with Li[N(SiMe3)2] in toluene. The thermal behavior of