Stéréochimie des échanges hydrogène-deuterium des protons benzyliques des arènetricarbonylchrome. Echange des protons en syn du métal
摘要:
Tetralintricarbonylchromium exchanges anti and syn benzylic protons in a solution of potassium tert-butoxide DMSO-d6. Under the same conditions the syn benzylic tertiary proton of trans-1-methyltetralintricarbonylchromium remains unchanged. The anti and syn benzylic protons of dihydroanthracenetricarbonylchromium and xanthenetricarbonylchromium undergo exchange and trans-9-methyl xanthenetricarbonylchromium undergoes exchange and epimerisation.
The reaction of mono-Cr(CO)3 complexes of a number of aromatic compounds containing two arene groups with the Mn(CO)3+ transfer agent [(naphthaleneMn(CO)3]+ gave new Cr/Mn diarene heterobimetallic compounds, e.g., (OC)3Cr(η6-C6H5CHCHC6H5-η6)Mn(CO)3+. This and two others of these compounds were characterized by X-ray diffraction. The two metal carbonyl groups were found to be on the same face of the