Issue 48, 2021

Distinctly different reactivity of bis(silylenyl)-versus phosphanyl-silylenyl-substituted o-dicarborane towards O2, N2O and CO2

Abstract

In stark contrast to the reactivity of the bis-silylenyl dicarborane CB–Si2 (1) [CB = ortho-C,C′-C2B10H10, Si = PhC(tBuN)2Si] towards O2, N2O, and CO2, yielding the same dioxygenation product CB–Si2O2 (2) with a four-membered 1,3,2,4-disiladioxetane ring, the activation of the latter small molecules with the phosphanyl-silylenyl-functionalised CB–SiP (3) {P[double bond, length as m-dash]P[N(tBu)CH2]2} affords with O2 the CB–Si([double bond, length as m-dash]O)P([double bond, length as m-dash]O) silanone-phosphine oxide (4), with N2O the CB–Si([double bond, length as m-dash]O)P silanone-phosphine (5), and with CO2 the CB–Si(O2C[double bond, length as m-dash]O)P silicon carbonate-phosphine (6) and CB–C([double bond, length as m-dash]O)OSiOP ester (7), respectively.

Graphical abstract: Distinctly different reactivity of bis(silylenyl)-versus phosphanyl-silylenyl-substituted o-dicarborane towards O2, N2O and CO2

Supplementary files

Article information

Article type
Communication
Submitted
12 Apr 2021
Accepted
13 May 2021
First published
18 May 2021
This article is Open Access
Creative Commons BY license

Chem. Commun., 2021,57, 5965-5968

Distinctly different reactivity of bis(silylenyl)-versus phosphanyl-silylenyl-substituted o-dicarborane towards O2, N2O and CO2

Y. Xiong, S. Yao, A. Ruzicka and M. Driess, Chem. Commun., 2021, 57, 5965 DOI: 10.1039/D1CC01939B

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