Unsupported monomeric stibine oxides (R₃SbO) remain undiscovered

Abstract

Attempts to investigate the properties and reactivity of the stiboryl moiety (R3Sb+–O– or R3Sb=O), as in monomeric stibine oxides free of interaction with Lewis acids/bases, led us to conclude that...

Tetrachlorocatecholates of triarylarsines as a novel class of Lewis acids

“…It is known that the Sb-O bond is more labile than As-O or P-O. 19 This result implies that the As(V) Lewis acids obtained in this work can work as a stable Lewis acid catalyst.…”

“…Measurement 1 H (400 MHz), 13 C (100 MHz), 19 F (376 MHz) and 31 P (162 MHz) nuclear magnetic resonance (NMR) spectra were recorded using a Bruker AVANCE III 400 NMR spectrometer. High resolution mass spectra (HRMS) were recorded using a JEOL JMS-SX102A spectrometer.…”

“…Single crystals of 5 were obtained by recrystallization (CH 2 Cl 2 /n-hexane). 1 H NMR (CDCl 3 , 400 MHz): δ 8.32 (dd, J = 7.5, 0.9 Hz, 2H), 8.17 (s, 2H), 7.96 (s, 2H), 7.94 (s, 1H), 7.68 (td, J = 7.5, 1.4 Hz, 2H), 7.60 (td, J = 7.4, 1.1 Hz, 2H) ppm; 19 Tetrachlorocatecholato-9-pentafluorophenyl-9-arsafluorene (6). Solid o-chloranil (141.8 mg, 0.577 mmol) was added to a CH 2 Cl 2 solution (2.5 mL) of 6′ (227.4 mg, 0.577 mmol).…”

Geometry of Pentaphenylantimony in Solution: Support for a Trigonal Bipyramidal Assignment from X-ray Absorption Spectroscopy and Vibrational Spectroscopic Data

“…Our interest in the fundamental and bioinorganic chemistry of group 15 elements , prompted us to investigate the utility of spectroscopic techniques that can provide insight into the geometry about Sb centers. We were particularly interested in XAS because it provides an opportunity to directly probe the Sb center.…”

H-Atom Assignment and Sb–O Bonding of [Mes3SbOH][O3SPh] Confirmed by Neutron Diffraction, Multipole Modeling, and Hirshfeld Atom Refinement

“…A recent investigation into the chemistry of stibine oxides uncovered only two well-characterized examples of putative monomeric stibine oxides: Mes 3 SbO···HO 3 SR, where R = Ph and CF 3 . , Our reanalysis of these substances revealed, however, that both in fact feature the hydroxytrimesitylstibonium cation. Although we used a variety of orthogonal techniques to support this conclusion, our selection of the [Mes 3 SbOH]­[O 3 SR] formulation over Mes 3 SbO···HO 3 SR rested most heavily on the complication-fraught location of an H atom in an independent atom model (IAM) X-ray crystal structure.…”