![Sample our Physical Sciences journals, sign in here to start your FREE access for 14 days]({"type":"image" , "src" : "/sda/110819/TOC-Subject-Sample-2021-Physical-Sciences.jpg"})
The reaction of tetrakis(trimethylsilyl)- (or cis-diphenyl) cyclobutadiene cobalt complexes with lithium metal in THF at room temperature produced the dilithium salts of tetrakis(trimethylsilyl)- (or cis-diphenyl) cyclobutadiene dianion, which were isolated as pale yellow (or pale orange) solids stable in the absence of air. NMR spectra and X-ray crystallography of these dianions provide the evidence for an aromatic character with a six π-electron system.
Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?
To request a reprint or corporate permissions for this article, please click on the relevant link below:
Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?
Obtain permissions instantly via Rightslink by clicking on the button below:
If you are unable to obtain permissions via Rightslink, please complete and submit this Permissions form. For more information, please visit our Permissions help page.
