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THE NATURE OF THE Co-ORDINATE LINK. PART 11. SYNTHESIS AND PHOSPHORUS-31 NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY OF PLATINUM AND PALLADIUM COMPLEXES CONTAINING SIDE-BONDED (E)-DIPHENYLDIPHOSPHENE. X-RAY CRYSTAL AND MOLECULAR STRUCTURES OF AND

DOI: 10.1039/DT9840002237

Source and publish data:

Journal of the Chemical Society, Dalton Transactions p. 2237 - 2244 (1984)

Update date:2022-08-05

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Authors:

Chatt, JosephChatt, Joseph

Hitchcock, Peter B.Hitchcock, Peter B.

Pidcock, AlanPidcock, Alan

Warrens, Christopher P.Warrens, Christopher P.

Dixon, Keith R.Dixon, Keith R.

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Article abstract of DOI:10.1039/DT9840002237

The complexes cis- react with Li2(PhPPPh) to give .Complex (1) reacts with (thf= tetrahydrofuran) to give (2).Complexes were characterized by 31P-(1H) n.m.r. spectroscopy.X-ray crystal-structure determinations of complexes (1) and (2) reveal nearly identical and planar PdP4 mieties comprising the donor atoms of L2 and η2-<(E)-diphenyldiphosphene> ligands.In (2) the two diphosphene lone pairs co-ordinate to W(CO)5 groups and the W-P bonds are bent 32 deg away from the Pd atom.The diphosphene P-P bond in (2) <2.186 (6) angstroem> is 0.06 angstroem longer than that in (1) <2.121 (4) angstroem>, which is similar to that in other diphosphene complexes and is approxymately mid-way between the P-P single and double bond lengths.Small values of the coupling constants 1J(PtP) and 2J(PP) involving the diphosphene ligand indicate that the diphosphene uses electrons of low s character in η2-co-ordination.

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