Flexible Coordination of Diphosphine Ligands Leading to cis and trans Pd(0), Pd(II), and Rh(I) Complexes
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A series of diphosphine ligands iPr2P–C6H4–X–C6H4–PiPr2 (for ligand L1, X = CH2; for ligand L2, X = CH2CH2) was investigated to determine the preference for cis/trans coordination to palladium(0), palladium(II), and rhodium(I). Increasing the length of the bridging alkyl backbone from one to two carbons changes the geometry of the resulting palladium(II) complexes, with L1 coordinating preferentially cis, while L2 coordinates in a trans fashion. Coordination to Pd(0) leads to L1Pd(dba) and L2Pd(dba), in which both ligands accommodate a P–M–P angle close to 120°. L2 was found to coordinate cis in a rhodium(I) complex ([L2Rh(nbd)][BF4], where nbd = norbornadiene).
创建时间：
2017-10-27
