910128-98-2Relevant academic research and scientific papers
Neutral and cationic complexes with P-bonded 2-pyridylphosphines as N-donor ligands toward rhodium. Electrical charge vs steric hindrance on the conformational control
Casares, Juan A.,Espinet, Pablo,Martin-Alvarez, Jose M.,Santos, Veronica
, p. 6628 - 6636 (2006)
Bimetallic palladium(II)-rhodium(I) and gold(I)-rhodium(I) complexes of the type [(4,4′-Me2-bipy)(C6F5)Pd(μ- PPh3-n-Pyn)Rh(diene)](BF4)2 and [(C6F5)Au(μ-PPh3-nPyn)Rh(diene)] (BF4) (n = 2, 3; Py = 2-pyridyl) have been synthesized. The P donor atom of the bridging ligands (μ-PPh3-nPyn) is coordinated to the Pd or to the Au center. The resulting complexes react with [Rh(diolefin)(solv)2]+ (solv = acetone) in a way similar to pyrazolylborates, affording square-planar or pentacoordinated rhodium complexes with two or the three N-donor ends chelating the Rh atom. The metallacycles formed upon chelation can adopt one of two conformations in the square-planar Rh(I) complexes, either bringing the other metal close to the Rh center or bringing it to a remote position. The first conformation is preferred for the gold P-coordinated complexes and the second for the palladium complexes. The X-ray structures of [(4,4′-Me2-bipy)](C6F 5)Pd(μ-PPhPy2)Rh(COD)](BF4)2 (COD = 1,5 cyclooctadiene) and [Au(C6F5)(μ-PPhPy 2)Rh-(TFB)](BF4) (TFB = 5,6,7,8-tetrafuoro-1,4-dihydro-1, 4-etenonaphthalene) are reported.
