84650-91-9Relevant articles and documents
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
Chatt, Joseph,Hitchcock, Peter B.,Pidcock, Alan,Warrens, Christopher P.,Dixon, Keith R.
, p. 2237 - 2244 (2007/10/02)
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- 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) is 0.06 angstroem longer than that in (1) , 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.