A new platform for NCN dimethylamino pincer complexes: Synthesis and structural studies
摘要:
The reaction of 2,6-(2-{Me2NCH2}C6H4)(2)C6H3I(2) with Pd-2(dba)(3) produced the NCN diamine pincer complex [2,6-(2-Me-2{NCH2}C6H4) 2C6H3PdI] (3) by an oxidative addition route. The structural analysis of ligand precursor 2 revealed a syn-conformation in the solid state. Single crystal X-ray analysis of complex 3 revealed a conventional square planar geometry about the palladium center and a global C-2 symmetric structure. Variable temperature and concentration NMR spectroscopic studies of complex 3 suggest an equilibrium between 3 and the dinuclear species [{2,6-(2-{Me2NCH2}C6H4)(2)C6H3Pd}2 mu(2)-I]I in CDCl3 solution. An unusual carbonate complex [{2,6-(2-{Me2NCH2}C6H4)(2)C6H3Pd}(3)mu(3)-CO3]I-3 (4) was also structurally characterized as a minor product during synthesis of 3. (C) 2007 Elsevier B.V. All rights reserved.
A new platform for NCN dimethylamino pincer complexes: Synthesis and structural studies
摘要:
The reaction of 2,6-(2-{Me2NCH2}C6H4)(2)C6H3I(2) with Pd-2(dba)(3) produced the NCN diamine pincer complex [2,6-(2-Me-2{NCH2}C6H4) 2C6H3PdI] (3) by an oxidative addition route. The structural analysis of ligand precursor 2 revealed a syn-conformation in the solid state. Single crystal X-ray analysis of complex 3 revealed a conventional square planar geometry about the palladium center and a global C-2 symmetric structure. Variable temperature and concentration NMR spectroscopic studies of complex 3 suggest an equilibrium between 3 and the dinuclear species [{2,6-(2-{Me2NCH2}C6H4)(2)C6H3Pd}2 mu(2)-I]I in CDCl3 solution. An unusual carbonate complex [{2,6-(2-{Me2NCH2}C6H4)(2)C6H3Pd}(3)mu(3)-CO3]I-3 (4) was also structurally characterized as a minor product during synthesis of 3. (C) 2007 Elsevier B.V. All rights reserved.