A Stable Aromatic Tetrasilacyclobutadiene Dication

Xiaofei Sun; Thomas Simler; Ravi Yadav; Ralf Köppe; Peter W. Roesky

doi:10.1021/jacs.9b08018

A Stable Aromatic Tetrasilacyclobutadiene Dication

Xiaofei Sun
, Thomas Simler
, Ravi Yadav
, Ralf Köppe
, Peter W. Roesky

Institute of Meteorology and Climate Research

Research output: Contribution to journal › Article › peer-review

Abstract

The isolation and characterization of the first silicon analogue of the aromatic cyclobutadiene dication is reported. The aromatic 2π-electron tetrasilacyclobutadiene dication in [(L^PhSi)₄](BPh₄)₂ (L^Ph = PhC(NtBu)₂) has been obtained in a simple and straightforward synthesis, from [L^PhSiCl], [L^PhSiSiL^Ph] and NaBPh₄, and fully characterized. The molecular structure reveals a four-membered Si₄-dication in an almost perfect square-planar geometry. Theoretical calculations support the interpretation of the title compound as a classical 2π-aromatic species with a singlet ground state.

Original language	English
Pages (from-to)	14987-14990
Number of pages	4
Journal	Journal of the American Chemical Society
Volume	141
Issue number	38
DOIs	https://doi.org/10.1021/jacs.9b08018
Publication status	Published - 25 Sept 2019
Externally published	Yes

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title = "A Stable Aromatic Tetrasilacyclobutadiene Dication",

abstract = "The isolation and characterization of the first silicon analogue of the aromatic cyclobutadiene dication is reported. The aromatic 2π-electron tetrasilacyclobutadiene dication in [(LPhSi)4](BPh4)2 (LPh = PhC(NtBu)2) has been obtained in a simple and straightforward synthesis, from [LPhSiCl], [LPhSiSiLPh] and NaBPh4, and fully characterized. The molecular structure reveals a four-membered Si4-dication in an almost perfect square-planar geometry. Theoretical calculations support the interpretation of the title compound as a classical 2π-aromatic species with a singlet ground state.",

author = "Xiaofei Sun and Thomas Simler and Ravi Yadav and Ralf K{\"o}ppe and Roesky, \{Peter W.\}",

note = "Publisher Copyright: Copyright {\textcopyright} 2019 American Chemical Society.",

year = "2019",

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doi = "10.1021/jacs.9b08018",

language = "English",

volume = "141",

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journal = "Journal of the American Chemical Society",

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T1 - A Stable Aromatic Tetrasilacyclobutadiene Dication

AU - Sun, Xiaofei

AU - Simler, Thomas

AU - Yadav, Ravi

AU - Köppe, Ralf

AU - Roesky, Peter W.

PY - 2019/9/25

Y1 - 2019/9/25

N2 - The isolation and characterization of the first silicon analogue of the aromatic cyclobutadiene dication is reported. The aromatic 2π-electron tetrasilacyclobutadiene dication in [(LPhSi)4](BPh4)2 (LPh = PhC(NtBu)2) has been obtained in a simple and straightforward synthesis, from [LPhSiCl], [LPhSiSiLPh] and NaBPh4, and fully characterized. The molecular structure reveals a four-membered Si4-dication in an almost perfect square-planar geometry. Theoretical calculations support the interpretation of the title compound as a classical 2π-aromatic species with a singlet ground state.

AB - The isolation and characterization of the first silicon analogue of the aromatic cyclobutadiene dication is reported. The aromatic 2π-electron tetrasilacyclobutadiene dication in [(LPhSi)4](BPh4)2 (LPh = PhC(NtBu)2) has been obtained in a simple and straightforward synthesis, from [LPhSiCl], [LPhSiSiLPh] and NaBPh4, and fully characterized. The molecular structure reveals a four-membered Si4-dication in an almost perfect square-planar geometry. Theoretical calculations support the interpretation of the title compound as a classical 2π-aromatic species with a singlet ground state.

U2 - 10.1021/jacs.9b08018

DO - 10.1021/jacs.9b08018

M3 - Article

C2 - 31507176

AN - SCOPUS:85072628134

SN - 0002-7863

VL - 141

SP - 14987

EP - 14990

JO - Journal of the American Chemical Society

JF - Journal of the American Chemical Society

IS - 38

ER -

A Stable Aromatic Tetrasilacyclobutadiene Dication

Abstract

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