A. Canty, Hong Jin, Andrew S. Roberts
Dec 24, 1996
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0
Influential Citations
45
Citations
Journal
Organometallics
Abstract
The first observations of oxidation of palladium(II) by water are reported. The pallada(II)cyclic complex ion [Pd(CH2CH2CH2CH2){(pz)3BH}]- [(pz)3BH = tris (pyrazol-1-yl)borate)] is oxidized by water in acetone or tetrahydrofuran to form Pd(CH2CH2CH2CH2)(OH){(pz)3BH} and hydrogen, and oxidation by hydrogen peroxide gives the same complex. Oxidation by halogens results in the formation of Pd(CH2CH2CH2CH2)(X){(pz)3BH} (X = Cl, Br, I), and these complexes, together with the hydroxopalladium(IV) complex, represent the first examples of stable dihydrocarbylpalladium(IV) complexes. The octahedral complex Pd(CH2CH2CH2CH2)(OH){(pz)3BH} forms adducts with phenol, 3-methylphenol, and pentafluorophenol with an overall composition of Pd(CH2CH2CH2CH2)(OH){(pz)3BH}·2ArOH (5 and 6) and Pd(CH2CH2CH2CH2)(OH){(pz)3BH}·C6F5OH (7). Complex hydrogen-bonding interactions occur in the adducts, consistent with the assignment of the phenol and 3-methylphenol adducts as hydroxopalladium(IV) complexes and the pentafluorophenol adduc...