Platinum Ii Complexes With Crown Thioethers And Phosphine Ligands PDF Download

Late transition metal oxo and imido complexes are important models for catalytic reactions involving oxygen and nitrogen transfer. The subject of this dissertation is the synthesis and reactivity study of a series of platinum(II) hydroxo, oxo, amido, imido and hydrazido complexes. The platinum(II) hydroxo complex (L$\sb2$Pt($\mu$-OH)) $\rm\sb2X\sb2$ is prepared from the reaction of L$\rm\sb2PtCl\sb2$ with two equivalents of AgX. Deprotonation of the hydroxo complex (L$\rm\sb2Pt(\mu$-OH)) $\sb2\sp{2+}$ yields corresponding oxo complexes. The site of deprotonation depends on the phosphine ligands. Pt(II) $\mu$-amido complexes are synthesized from the reaction of $\mu$-hydroxo complexes (L$\rm\sb2Pt(\mu$-OH)) $\rm\sb2(BF\sb4)\sb2$ with amines H$\sb2$NR. The result of the reaction depends on the ligand L$\sb2$ of the $\mu$-hydroxo complexes as well as on the R group of the amines. Treating (L$\rm\sb2Pt(\mu$-OH)) $\rm\sb2(BF\sb4)\sb2$ with two equivalents of H$\rm\sb2NNH\sb2$ generates an unusual hydrazido complex (L$\rm\sb2Pt(\mu$-NHNH$\rm\sb2)\rbrack\sb2(BF\sb4)\sb2$ which can be deprotonated to give ((dppm-H)Pt($\mu$-NHNH$\sb2)\rbrack\sb2$.