Inorganic Chemistry Commons^™

Dirhenium Compounds Containing The Diphosphine Ligands Ph2pch2pph2, Ph2pch(Cn)Pph2, Or Ph2pch(Ch3)Pph2: A Comparative Study, Hannah C. Arthur

Undergraduate Honors Theses

When M₂L₁₀ complexes containing two rhenium(III) atoms in a quadruple bond react with an excess of the diphosphine ligand Ph₂PCH₂PPh₂, the bond order decreases, and the rhenium is reduced to rhenium(II). When two diphosphine ligands are bonded to the dirhenium center, they can adopt a trans-trans, trans-cis, or cis-cis configuration. NMR spectra of compounds that adopt the cis-cis arrangement show unusually large downfield shifts for one of the bridgehead methylene hydrogens (P-CH₂-P). To understand the unusual chemical shift, the hydrogens first have to be assigned. The strategy for …