Basicity of carbonyl complexes of transition metals : X . Interaction of (π-C 5H 5)Mn(CO)(Ph 2PCH 2CH 2PPh 2) with aprotic acids in solution

Abstract

The interaction of CpMn(CO)(Ph 2PCH 2CH 2PPh 2) with some aprotic acids in solution has been studied by infrared, electronic and ESR spectroscopy and electroconductivity. It is shown, that reactions with π-acids and some π-complexes such as CpTiX 3, CP 2MCl 2 (M  Ti, Zr, Hf, V) take place with oxidation of the manganese atom electron transfer to the acceptor molecule and the formation of the cation-radical of the donor molecule. It is also shown that an increase in the oxidation state of the Mn atom occurs in the reactions with halides of Al, Ti, Sn and Hg and the structure of the products is discussed. Less basic complexes CpMn(CO) 3, Et 5C 5Mn(CO) 3 and Et 5C 5Mn(CO) 2PPh 3 are not oxidised in the presence of tetracyanoethylene but form charge-transfer complexes.