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Alkyne Insertions into the ?-Pd-C(sp2, ferrocene) Bond of Cyclopalladated Complexes containing Schiff Bases derived from Ferrocene. Crystal Structures of (R = H or Me)

DOI: 10.1039/DT9950001839

Source and publish data:

Journal of the Chemical Society, Dalton Transactions p. 1839 - 1850 (1995)

Update date:2022-08-04

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Authors:

Lopez, ConcepcionLopez, Concepcion

Bosque, RamonBosque, Ramon

Solans, XavierSolans, Xavier

Font-Bardia, MerceFont-Bardia, Merce

Silver, JackSilver, Jack

Fern, GeorgeFern, George

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Article abstract of DOI:10.1039/DT9950001839

Reactions of di-μ-chloro-bridged cyclopalladated compounds (R = H, Ph or Me, R' = CH2Ph; R = H, R' = CH2CH2Ph) with alkynes R''CCR'' (R'' = Et or Ph) have been studied.In all cases these reactions produce nine-membered metallocycles (R'' = Et or Ph), which arise from a double insertion of the alkyne.Compounds (R = H 4a or Me 4d) have been characterized structurally.Complex 4a is monoclinic, space group C2/c, with a = 30.783(4), b = 11.320(2), c = 20.181(3) Angstroem and β = 27.23(3) deg; compound 4d is also monoclinic space group P21/a, with a = 20.308(4), b = 11.075(2), c = 12.565(2) Angstroem and β = 92.01(3) deg.These structural studies confirm the existence of a bicyclic system arising from the fusion of a nine-membered ring and the C5H3 moiety of the ferrocenyl moiety.The differences observed in the reactivity of the ?(Pd-Csp2, ferrocene) bond in the cyclopalladated compounds (R = H, Ph or Me) and in can be explained in terms of the electron donor ability of the chelated ligand.This property is reflected mainly in the redox potential of the iron centre.

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Product name:[Pd(((EtC=CEt)2(η5-C5H3CH=NCH2Ph))Fe(η5-C5H5))Cl]

Cas No:168022-98-8

168022-98-8

R&D Labs maybe for 168022-98-8

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