Oxidative addition of tetrabromo-1,2-benzoquinone totrans-carbonylchlorobis(triphenylphosphine)rhodium andtrans-carbonyliodiobis(triphenylphosphine)rhodium

作者: Bruno Giovannitti , Mauro Ghedini , Giuliano Dolcetti

DOI: 10.1007/BF00619002

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摘要: The oxidative addition of tetrabromo-1,2-benzoquinone to Rh(CO)X(PPh3)2 (X = Cl or I) has been studied. With the square planar complex Rh(CO)Cl(PPh3)2, two new isomeric hexacoordinated compounds; withcis andtrans PPh3 ligands, have isolated and their structures are discussed on basis spectroscopic data. Thecis isomer in acetone solution quickly converts into thetrans. Such a conversion presumably proceeds through dissociation triphenylphosphine molecule as seems indicated by isolation pentacoordinated intermediate species Rh(CO)I(PPh3)(1,2-O2C6Br4), which identified elemental analysis spectroscopically characterized.

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