186554-13-2Relevant academic research and scientific papers
New platinum(II) complexes of Ph2PNHP(O)Ph2 and -
Slawin, Alexandra M. Z.,Smith, Martin B.,Woollins, J. Derek
, p. 4567 - 4574 (2007/10/03)
Refluxing a suspension of cis- in methanol for ca. 11 h led to Ph2P-N bond cleavage of one of the HL ligands and formation of cis- 1.Prolonged refluxing of 1 in methanol (5 d) gave predominantly unchanged 1 in addition to some cis- 2 and cis- 3 .Reaction of 1 with KOBut afforded solely 3 in good yield.Bridge cleavage of 2> with 2 equivalents of HL gave trans- 4a which is smoothly isomerised to cis- 4b upon addition of trace amounts of HL.Complexes 4a and 4b reacted with KOBut (ca. 1.4 equivalents) in methanol to yield trans- and cis- 5a and 5b respectively.Chloride abstraction of either 4a or 4b with Ag in dichloromethane yielded the P,O-chelate cationic complexes trans- (6a) or cis- 6b respectively.Further reaction of 5b with KOBut in methanol gave the hydroxide-bridged platinum(II) dimer 2> 7 in which the P-donor atom in L is co-ordinated to the platinum(II) centre and the O-donor atom is involved in an intramolecular hydrogen bond to the hydroxide ligand (X-ray evidence).All the compounds 1-7 have been characterised by a combination of 31P- and 195Pt- NMR, IR spectroscopy and microanalysis.Furthermore the solid-state structures of cis-, the geometric isomers trans- and cis- and 2 have been determined by single-crystal X-ray diffraction.
