209525-76-8Relevant academic research and scientific papers
Synthesis of 2,6-bis(diphenylphosphinomethyl) pyridine-monoligand-rhodium(I) complexes [Rh(PNP)L]X with L = pyridine, CH3CN, DMSO and X = CF3SO3, BF4 from the corresponding ethylene complex and comparison of the structures to the piperidine complex (L = piperidine, X = BF4)
Hahn, Christine,Sieler, Joachim,Taube, Rudolf
, p. 1183 - 1193 (1998)
Investigation of the coordination conditions at the 2,6-bis(diphenylphosphinomethyl)pyridine-rhodium(I) fragment [Rh(PNP)]+ by X-ray crystallography showed a square planar geometry of the neutral chloro and the cationic piperidine complexes, [Rh(PNP)Cl] (1) and [Rh(PNP)(pip)]BF4 (2). New cationic rhodium(I) complexes [Rh(PNP)L]X (L = pyridine, X = SO3CF3 3; L = CH3CN, X = SO3CF3 4a, X = BF4 4b; L = DMSO, X = SO3CF3 5) have been synthesized from the ethylene complexes [Rh(PNP)(C2H4)]X by substitution of the ethylene by the ligand L (L = py, CH3CN, or DMSO). The complexes 3-5 were characterized by IR spectroscopy, 1H-, 13C-, and 31P-NMR spectroscopy and X-ray crystallography. The influence of the ligands on the structure of the complexes was investigated. The cis influence was determined by measurement of the coupling constant JP-Rh and the average length of the Rh - P bonds and the trans influence by the length of the Rh - N(1) bond.
