Tetrakis(trimethylsilyl)cyclobutadiene Dianion Alkaline Earth Metal Salts: New Members of the 6π‐Electron Aromatics Family | Zendy

Takanashi Kazunori | Zendy; Inatomi Akira | Zendy; Lee Vladimir Ya. | Zendy; Nakamoto Masaaki | Zendy; Ichinohe Masaaki | Zendy; Sekiguchi Akira | Zendy

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Tetrakis(trimethylsilyl)cyclobutadiene Dianion Alkaline Earth Metal Salts: New Members of the 6π‐Electron Aromatics Family

Author(s) -

Takanashi Kazunori,

Inatomi Akira,

Lee Vladimir Ya.,

Nakamoto Masaaki,

Ichinohe Masaaki,

Sekiguchi Akira

Publication year - 2008

Publication title -

european journal of inorganic chemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.667

H-Index - 136

eISSN - 1099-0682

pISSN - 1434-1948

DOI - 10.1002/ejic.200800066

Subject(s) - cyclobutadiene , chemistry , trimethylsilyl , alkaline earth metal , magnesium , metal , salt (chemistry) , aromaticity , alkali metal , ring (chemistry) , inorganic chemistry , crystallography , medicinal chemistry , molecule , organic chemistry

The magnesium and calcium salts of the tetrakis(trimethylsilyl)cyclobutadiene dianion, [Mg(thf) 3 ] 2+ [(Me 3 Si) 4 C 4 ] 2– ( 2a ) and [Ca(thf) n ] 2+ [(Me 3 Si) 4 C 4 ] 2– ( 2b ), were synthesized by the reduction of tetrakis(trimethylsilyl)cyclobutadiene [(Me 3 Si) 4 C 4 , 1 ] with metallic magnesium or calcium, respectively. X‐ray analysis of 2a showed a planar four‐membered ring, featuring a diagnostic η 4 ‐coordination to the magnesium atom and skeletal C–C bond lengths intermediate between those of typical C–C single and C=C double bonds. The structural and spectral features of the cyclobutadiene dianion magnesium salt 2a give evidence for its appreciable aromaticity.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)

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