An Unusual Pair of Bis(phosphido)‐Bridged Diiron Carbonyl Complexes: [Fe2(CO)n{μ‐P(tBu)2}(μ‐PCy2)] (n = 5 and 6)
Treatment of Na[Fe2(CO)6(μ‐CO){μ‐P(tBu)2}] with Cy2PCl gives [Fe2(CO)6{μ‐P(tBu)2}(μ‐PCy2)] (1) which loses CO on heating in toluene to afford [Fe2(CO)5{μ‐P(tBu)2}(μ‐PCy2)] (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.
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