The preparation of the ligands o-Me,N*C,H,*PPh,, (o-Me,NC,H,),PPh, and (o-Me,N*C,H,),P, and their complexes [MX,(ligand)] (M = Pd or P t ; X = C1, Br, or I), are described. It is shown that only the phosphorus and one of the nitrogen atoms of the terdentate and quadridentate ligands are bonded to the metal ions which exhibit their usual square-planar co-ordination.
Serviceable N M R spectra can, with a few exceptions [1,61,
be recorded for paramagnetic complexes in solution. These spectra provide information about the structure of the complexes and the disrribution of the unpaired electrons, and hence also about reactive centers in the molecule. The elucidation of intermolecular and intramolecular exchange phenomena, e.g. the determination of Iigand exchange rate constants, the determination of rotation barriers, and the detection of contact complexes in solution, or even of occupation equilibria of the electrons, is possible in this way. It can be seen, therefore,that N M R studies on paramagnetic complexes can be a rich source of' information.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.