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Synthetic, Dynamic Nuclear Magnetic Resonance and Crystallographic Studies of Platinum Complexes containing Silyl-substituted Dialkenyl-thioether and -selenoether Ligands

DOI: 10.1039/DT9940002637

Source and publish data:

Journal of the Chemical Society, Dalton Transactions p. 2637 - 2644 (1994)

Update date:2022-08-05

Topics:

Authors:

Abel, Edward W.Abel, Edward W.

Koe, Julian R.Koe, Julian R.

Hursthouse, Michael B.Hursthouse, Michael B.

Malik, K. M. AbdulMalik, K. M. Abdul

Mazid, Mohammed A.Mazid, Mohammed A.

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Article abstract of DOI:10.1039/DT9940002637

Potentially quadridentate di(silaalkenyl) chalcogenoether ligands have been observed to bind in a bidentate mode via an alkene moiety and a chacogen lone pair of electrons to platinum(II) and in a tridentate mode to rhodium(I) metal centres, via the chalcogen atom and both alkene moieties.Variable-temperature NMR studies established the occurrence of fluxional processes in these complexes, the energy barriers of which have been evaluated for the platinum systems.The crystal structures of two species have been determined: > forms monoclinic crystals of space group P21/a with a = 12.279(5), b = 8.961(3), c = 18.575(3) Angstroem, β = 108.49(2) deg and Z = 4 and <>2> forms triclinic crystals of space group P<*> with a = 7.7178(12), b = 10.289(4), c = 10.5932(14) Angstroem, α = 92.56(2), β = 99.544(14), γ = 105.26(2) deg and Z = 1.The platinum complex is monomeric and has a square-planar geometry with the iodine atoms in cis positions, whilst the rhodium complex is a centrosymmetric dimer with two chlorine atoms bridging a pair of rhodium atoms, both having trigonal-bipyramidal geometry.

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