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W2000356607 endingPage "81" @default.
W2000356607 startingPage "73" @default.
W2000356607 abstract "The diphenylphosphine ligand of [CpFe(CO)(PPh2H)(COMe)] (Cp  η5-C5H5) can be deprotonated with DBU (DBU = 1, 8-diazabicyclo[5.4.0]undec-7-ene) or n-butyllithium; subsequent alkylation with RI (R  Me, Et) gives the complexes [CpFe(CO)(PPh2R)COMe)]. Reaction of the anionic phosphido complex with the electrophilic alkyne methyl propiolate (HOCCO2Me) followed by reprotonation with CH3COOH gives the vinylphosphine complex [CpFe(CO)(PPh2CHCHCO2Me) (COMe)], whereas a similar reaction sequence with dimethyl acetylenedicarboxylate (DMAD, MeO2CCCCO2Me) produces two isomers of the complex [CpFe(CO){Ph2PCH(CO2Me)C(CO2Me)C(Me)O}], in which linking of the alkyne with both the phosphido and acetyl ligands has occurred to form a six-membered metallacycle. The structure of one of the two isomers has been determined by X-ray diffraction and shows that the metallacyclic ring is bound to the iron atom through the phosphorus and the carbonyl oxygen of the acetyl group, and adopts a boat conformation in the solid state." @default.
W2000356607 created "2016-06-24" @default.
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W2000356607 date "1993-11-01" @default.
W2000356607 modified "2023-09-27" @default.
W2000356607 title "Metallacycle formation through the linking of an alkyne with phosphido and acetyl groups at an iron centre: X-ray structure of [Cp}] (Cp =η5-C5H5)" @default.
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W2000356607 doi "https://doi.org/10.1016/0022-328x(93)80360-n" @default.
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