1414791-67-5Relevant articles and documents
Structural and reactivity comparison of analogous organometallic Pd(iii) and Pd(iv) complexes
Tang, Fengzhi,Qu, Fengrui,Khusnutdinova, Julia R.,Rath, Nigam P.,Mirica, Liviu M.
, p. 14046 - 14050 (2012)
The tetradentate ligands RN4 (RN4 = N,N′-di-alkyl-2,11-diaza[3,3](2,6)pyridinophane, R = Me or iPr) were found to stabilize cationic (RN4)PdMe2 and ( RN4)PdMeCl complexes in both PdIII and PdIV oxidation states. This allows for the first time a direct structural and reactivity comparison of the two Pd oxidation states in an identical ligand environment. The PdIII complexes exhibit a distorted octahedral geometry, as expected for a d7 metal center, and display unselective C-C and C-Cl bond formation reactivity. By contrast, the PdIV complexes have a pseudo-octahedral geometry and undergo selective non-radical C-C or C-Cl bond formation that is controlled by the ability of the complex to access a five-coordinate intermediate. The Royal Society of Chemistry 2012.