Fusing triphenylphosphine with tetraphenylborate: introducing the 9-phosphatriptycene-10-phenylborate (PTB) anion
作者:Marcus W. Drover、Koichi Nagata、Jonas C. Peters
DOI:10.1039/c8cc04321c
日期:——
In a fusion of two ubiquitous organometallic reagents, triphenylphosphine (PPh3) and tetraphenylborate (BPh4−), the 9-phosphatriptycene-10-phenylborate (PTB) anion has been prepared for the first time. This borato species has been fully characterized by a suite of spectroscopic methods, and initial reactivity studies introduce it as a competent ligand for transition metals, including Co(II) and Fe(II)
Complementary Synthetic Approaches toward 9-Phosphatriptycene and Structure–Reactivity Investigations of Its Association with Sterically Hindered Lewis Acids
Two practical and high-yielding syntheses of 9-phosphatriptycene are reported. In both approaches, the key step is based on the cyclization of a (tris)lithio-triphenylmethane or a (tris)lithio-triphenylphosphine intermediate on a phosphorus or a carbon electrophile, respectively. The association of 9-phosphatriptycene with representative boron- and carbon-centered Lewis acids was investigated by IR
Pushing the Lewis Acidity Boundaries of Boron Compounds With Non‐Planar Triarylboranes Derived from Triptycenes
作者:Ali Ben Saida、Aurélien Chardon、Arnaud Osi、Nikolay Tumanov、Johan Wouters、Abel I. Adjieufack、Benoît Champagne、Guillaume Berionni
DOI:10.1002/anie.201910908
日期:2019.11.18
9-boratriptycene derivatives with unprecedented structures and reactivities. NMR spectroscopy and X-ray diffraction of the Lewisadducts of these non-planar boron Lewisacids with weak Lewis base revealed particularly strong covalent bond formation. The first Lewisadduct of a trivalent boron compounds with the Tf2 N- anion illustrates the unrivaled Lewis acidity of these species. Increasing the pyramidalization
A Stable Crystalline Triarylphosphine Oxide Radical Anion
作者:Tobias A. Schaub、Eva M. Zolnhofer、Dominik P. Halter、Tatyana E. Shubina、Frank Hampel、Karsten Meyer、Milan Kivala
DOI:10.1002/anie.201605963
日期:2016.10.17
Triarylphosphine oxides (Ar3P=O) are being intensely studied as electron‐accepting (n‐type) materials. Despite the widespread application of these compounds as electron conductors, experimental data regarding the structural and electronic properties of their negatively charged states remain scarce owing to their propensity for follow‐up chemistry. Herein, a carefully designed triarylphosphine oxide scaffold
Sterically Crowded Tris(2‐(trimethylsilyl)phenyl)phosphine – Is it Still a Ligand?
作者:Hans Gildenast、Felix Garg、Ulli Englert
DOI:10.1002/chem.202103555
日期:2022.2
P(o-TMSC6H4)3: A phosphine with selective reactivity. The steric bulk (represented by the security guard) shields the phosphorus from most external influences – but not from all. Spectroscopy and diffraction reveal the structural diversity of this molecule and its hand picked reaction products.
P( o -TMSC 6 H 4 ) 3:具有选择性反应性的膦。空间位阻(由保安代表)保护磷免受大多数外部影响 - 但不是全部。光谱和衍射揭示了这种分子的结构多样性及其手工挑选的反应产物。