140633-99-4Relevant academic research and scientific papers
Coordinatively unsaturated complexes [Fe2(CO)5(μ-PBut2)(μ-PR 2)](Fe=Fe) (R = Cy, Ph): Addition of PBun3, Ph2PH, and dppm (dppm = bis(diphenylphosphino)methane). The unprecedented complex [Fe2(CO)3(μ-PBut2)(μ-PCy 2)(μ-dppm)](Fe-Fe)
Walther, Bernhard,Hartung, Helmut,Bambirra, Sergio,Krug, André,B?ttcher, Hans-C.
, p. 172 - 178 (2008/10/08)
A convenient synthesis of the saturated complexes [Fe2(CO)6(μ-PBut2)(μ-PR 2)] (R = Cy (4), Ph (5)) and their photochemical in situ transformation into the corresponding unsaturated diiron pentacarbonyl complexes 2 and 3 are described. These compounds readily add PBun3 and Ph2PH, respectively, in the molar ratio 1:1 to give the complexes [Fe2(CO)5(μ-PBut2)(μ-PR 2)(PR′2R″)] (R = Cy, R′ = R″ = Bun (6); R′ = Ph, R″ = H (7); R = R′ = Ph, R″ = H (8)). Complex 6 reacts under UV irradiation with excess PBun3 to afford the complex [Fe2(CO)4-(μ-PBut2)(μ-PCy 2)(PBun3)2] (9). Treatment of 2 with dppm (dppm = bis(diphenylphosphino)-methane) gives after subsequent photolysis the unprecedented triply-bridged complex [Fe2(CO)3(μ-PBut2)(μ-PCy 2)(μ-dppm)] (10). Complex 10, formally belonging to the complexes of general formula [Fe2L5(μ-PR2)2] (L = 2e ligand) with an iron-iron double bond, shows only an iron-iron single bond distance (2.631(1) A?) due to the bent Fe2(μ-P〈)2 core (θ = 107.6°) caused by the bridging dppm ligand. The molecular structures of complexes 6, 7, and 10 are described.
An Unusual Pair of Bis(phosphido)-Bridged Diiron Carbonyl Complexes: (n = 5 and 6)
Walther, Bernhard,Hartung, Helmut,Reinhold, Joachim,Jones, Peter G.,Boettcher, Hans-Christian,et al.
, p. 1379 - 1382 (2007/10/02)
Treatment of Na with CyPCl gives (1) which loses CO on heating in toluene to afford (2).Complexes 1 and 2 have been characterized spectroscopically and by X-ray analyses.The central Fe2P2 unit in 1 is exactly planar whereas in 2 it is somewhat folded.Key Words: Bis(phosphido)-bridged diiron hexa(penta)carbonyl complexes, molecular structures / Steric strain / Iron-iron double bond / Calculation, EHT
