MONOCARBONYL COMPLEXES OF IRON(II) - PREPARATION AND PROPERTIES

Iron(II) monocarbonyl complexes of the type [FeX(CO)L<inf>4</inf>]BPh<inf>4</inf> [X = Cl or Br; L = P(OMe)<inf>3′</inf> P(OEt)<inf>3′</inf> or PPh(OEt)<inf>2</inf>] and the dicarbonyl compound [FeBr(CO)<inf>2</inf>{PPh(OEt)<inf>2</inf>}<inf>3</inf>] BPh<inf>4</inf> have been prepared and characterized by i.r.,¹H and ³¹P-{¹H} n.m.r. spectroscopy. Reactivity with some π-acceptor ligands has been investigated and synthesis of the new derivatives [FeBr(4-Me-C<inf>6</inf>H<inf>4</inf>NC)<inf>3</inf>L<inf>2</inf>]⁺ [L = P(OMe)<inf>3′</inf> P(OEt)<inf>3′</inf> or PPh(OEt)<inf>2</inf>] achieved.