A Fully Phosphane‐Substituted Disilene

Abstract

There is growing interest in compounds containing functionalizedE = Em ultiple bonds (E = Si, Ge,S n, Pb) because of their potential to exhibit novel physical and chemical properties.However,compounds containing multiple functionalizations are rare,w ith scarcity increasing with increasing degree of substitution. The first ditetrelene R 2 E=ER 2 in which the E=Eb ond is substituted by four heteroatoms (other than Si)i sd escribed. The tetraphosphadisilene {(Mes) 2 P} 2 Si = Si{P(Mes) 2 } 2 (7)i sr eadily isolated from the reaction between SiBr 4 and [(Mes) 2 P]Li, the latter of which acts as as acrificial reducing agent. The structure of 7 is presented, while the bonding in, and stability of 7 were probed using DFT calculations.Supportinginformation and the ORCID identification number(s) for the author(s) of this article can be found under: http://dx.

Comparison of Two Phosphinidenes Binding to Silicon(IV)dichloride as well as to Silylene

“…The bond between the carbene carbon and the phosphorus atom (C1–P1/C21–P2) is 1.7501(10)/1.7501(10) Å, which is slightly longer than those reported in the literature for cAACP–PcAAC and cAACN–PcAAC (1.719 Å in both these cases), thus indicating the presence of less double-bond character between the phosphorus and the carbene carbon atoms in compound 2 . The Si–P bond distances [Si1–P1 2.2238(4), Si1–P2 2.2228(4)] are shorter than the Si–P single bond length {2.2448(7) and 2.2483(7)} in {(Dipp) 2 P} 2 SiCl 2 and 2.2572(8) Å in LSi­(Cl 2 )–P­(cAAC) [L= benzamidinate; PhC­(N t Bu) 2 ].…”

“…It is worth mentioning that the stabilization of phosphorus­(III) coordinated silylene failed from the reduction of {(Mes) 2 P} 2 SiCl 2 with 2 equiv of KC 8 , which gave complex {(Mes) 2 P} 3 SiK-(THF) 3 }. The latter was supported by only NMR spectroscopy …”

Spontaneous Decomposition of an Extraordinarily Twisted and Trans‐Bent Fully‐Phosphanyl‐Substituted Digermene to an Unusual GeI Cluster

“…In spite of the foregoing, we have recently shown that a careful choice of substituent at phosphorus enables the isolation of a fully‐phosphanyl‐substituted disilene {(Mes) 2 P} 2 Si=Si{P(Mes) 2 } 2 ( 2 ), [13] the first example of a fully heteroatom‐substituted ditetrelene in which the heteroatoms possess a lone pair (Mes=2,4,6‐Me 3 C 6 H 2 ). Unfortunately, 2 proved insoluble, even in strong donor solvents such as THF, preventing a detailed study of its reactivity.…”