Interaction of Palladium(II) Acetate with Substituted Pyridines, including a Cyclometallation Reaction and the Structure of 2-C5H3N>(O2CMe)>*3H2O

DOI: 10.1039/DT9860002205

Source and publish data:

Journal of the Chemical Society, Dalton Transactions p. 2205 - 2210 (1986)

Update date:2022-07-30

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Authors:

Canty, Allan J.

Minchin, Nigel J.

Skelton, Brian W.

White, Allan H.

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Article abstract of DOI:10.1039/DT9860002205

The reactivity of meso- and rac- diastereoisomers of 2,6-bis<1-phenyl-1-(pyridin-2-yl)ethyl>pyridine <<(py)PhMeC>2C5H3N>,2,6-bis<1,1-bis(pyridin-2-yl)ethyl>pyridine <<(py)2MeC>2C5H3N>, and the pyridin-2-yl methanes (py)nPh3-nCH (n = 1-3), (py)nCH4-n (n = 2 or 3), and (py)3PhC toward palladium(II) acetate in refluxing glacial acetic acid and at ambient temperature in organic solvents has been investigated.The nitrogen donor ligands form co-ordination derivatives in organic solvents.All except α-phenyl-α-(pyridin-2-yl)toluene<(py)Ph2CH> form identical complexes in glacial acetic acid, with (py)Ph2CH undergoing cyclometallation to form <(μ-O2CMe)>2>.meso-<(py)PhMeC>2C5H3N, which binds as a tripodal tridentate ligand to methylmercury(II), has been shown by a single crystal X-ray study to act as a planar tridentate ligand to palladium(II) in 2C5H3N>(O2CMe)>*3H2O with square-planar co-ordination being completed by a unidentate acetate group 1/c, a = 11.795(5), b = 23.10(1), c = 12.313(5) Angstroem, β = 95.64(3)deg, Z = 4; R = 0.051 for 3 657 'observed' reflections>.Syntheses of the new ligand <(py)2MeC>2C5H3N, with five pyridine donor groups, and α,α,α,-tris(pyridin-2-yl)toluene <(py)3PhC> are described.

Full text of DOI:10.1039/DT9860002205

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