133360-75-5Relevant academic research and scientific papers
Synthesis and X-ray Structure of Binaphthyl-Based Macrocyclic Diphosphanes and their Ni(II) and Pd(II) Complexes
Widhalm, Michael,Kratky, Christoph
, p. 679 - 690 (2007/10/02)
16- and 18-membered diphospha macrocycles (8, 12, and 15) have been synthesized from the corresponding 1,1'-binaphthyl precursors (6, 11, and 14, resp.) and o-phenylenebis(phenylphosphane) by means of high-dilution conditions in 55, 49, and 87percent yield.X-ray structure analyses of 8a, 8b, 12b, and 12b*NiCl2 reveal their distinctly different conformations and conformational changes caused by complexation.These structural features are reflected in the pronounced different tendency of the compounds concerned to form Ni(II) and Pd(II) complexes. Key Words: 1,1'-Binaphthyls / Diphosphanes / Nickel complexes / Palladium complexes
Axialchiral Macrocyclic Diphosphines
Widhalm, Michael
, p. 1053 - 1057 (2007/10/02)
Two cyclic diphosphines, 1 and 2, have been prepared which show a remarkable stability against oxidation.This result is discussed on the basis of their rigid conformation, directing the lone pairs of the P-atoms towards the center of the cycle.
