CRYSTAL-STRUCTURES OF [FE-3(CO)(9)(P(OR)(3))(3)] (R=ME OR PR-I)

The structures of [Fe-3(CO)(9){P(OR)(3)}(3)] (R = Me or Pr-i) that wer e assigned previously on the basis of NMR investigations have been que stioned. The crystal structures of these compounds have now been deter mined and shown to be in complete agreement with the predicted structu res. The crystal structure of [Fe-3(CO)(9){P(OPri)(3)}(3)] is the firs t structure determination of a derivative of [Fe-3(CO)(12)] with pseud o D-3 symmetry and is similar to that commonly found for the ruthenium and osmium analogues.