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When dibenzo[a,e]cyclooctatetraene and hexacarbonylchromium are refluxed in di-n-butyl ether/THF for an extended period, both the syn,anti and anti,anti isomers of the bis-tricarbonylchromium complex are obtained. After separation by column chromatography, the syn,anti:anti,anti isomer ratio is approximately 12:1. The anti,anti arrangement of the Cr(CO) 3 groups was verified by X-ray crystallographic...
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