Coordination Behavior of a P4-Butterfly Complex towards Transition Metal Lewis Acids: Preservation versus Rearrangement |
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| Authors: | Julian Müller Prof Manfred Scheer |
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| Institution: | University of Regensburg, Institute of Inorganic Chemistry, 93040 Regensburg, Germany |
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| Abstract: | The reactivity of the P4 butterfly complex {Cp’’’Fe(CO)2}2(μ,η1:1-P4)] ( 1 , Cp’’’=η5-C5H2tBu3) towards divalent Co, Ni and Zn salts is investigated. The reaction with the bromide salts leads to {Cp’’’Fe(CO)2}2(μ3,η2:1:1-P4){MBr2}] (M=Co ( 2Co ), Ni ( 2Ni ), Zn ( 2Zn )) in which the P4 butterfly scaffold is preserved. The use of the weakly ligated Co complex Co(NCCH3)6]SbF6]2, results in the formation of {(Cp’’’Fe(CO)2)2(μ3,η4:1:1-P4)}2Co]SbF6]3 ( 3 ), which represents the second example of a homoleptic-like octaphospha-metalla-sandwich complex. The formation of the threefold positively charged complex 3 occurs via redox processes, which among others also enables the formation of {Cp’’’Fe(CO)2}4(μ5,η4:1:1:1:1-P8){Co(CO)2}]SbF6] ( 4 ), bearing a rare octaphosphabicyclo3.3.0]octane unit as a ligand. On the other hand, the reaction with Zn(NCCH3)4]PF6]2 yields the spiro complex {(Cp’’’Fe(CO)2)2(μ3,η2:1:1-P4)}2Zn]PF6]2 ( 5 ) under preservation of the initial structural motif. |
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| Keywords: | chelate ligands cyclo-P4 ligands P4 butterfly complexes P4 transformation phosphorus |
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