Evaluation of Multisite Polypyridyl Ligands as Platforms for the Synthesis of Rh/Zn, Rh/Pd, and Rh/Pt Heterometallic Complexes
摘要:
Ligands containing linked dipicolylamine (dpa) and bipyridine (bpy) sites have been utilized in the synthesis of monometallic and heterometallic complexes. The two sites have different selectivities for metal binding, which allows preferential formation of singly metalated complexes. The dpa site of the ligands has been observed to bind selectively to Zn2+, Pd2+, and Pt2+, while the bpy site binds selectively to Rh+. Addition of a second metal then results in the formation of heterometallic products. In the presence of CD3OD, the heterometallic Rh/Pt and Rh/Pd complexes undergo rapid selective H/D exchange of one of the diastereotopic protons of the dpa methylene group.
Evaluation of Multisite Polypyridyl Ligands as Platforms for the Synthesis of Rh/Zn, Rh/Pd, and Rh/Pt Heterometallic Complexes
摘要:
Ligands containing linked dipicolylamine (dpa) and bipyridine (bpy) sites have been utilized in the synthesis of monometallic and heterometallic complexes. The two sites have different selectivities for metal binding, which allows preferential formation of singly metalated complexes. The dpa site of the ligands has been observed to bind selectively to Zn2+, Pd2+, and Pt2+, while the bpy site binds selectively to Rh+. Addition of a second metal then results in the formation of heterometallic products. In the presence of CD3OD, the heterometallic Rh/Pt and Rh/Pd complexes undergo rapid selective H/D exchange of one of the diastereotopic protons of the dpa methylene group.
Heterobimetallic Complexes of Polypyridyl Ligands Containing Paramagnetic Centers: Synthesis and Characterization by IR and EPR
作者:Sarah K. Goforth、Richard C. Walroth、Joseph A. Brannaka、Alexander Angerhofer、Lisa McElwee-White
DOI:10.1021/ic401952s
日期:2013.12.16
Ligandscontaining linked dipicolylamine (dpa) and bipyridine sites have been explored as platforms for the synthesis of heterometallic complexescontaining the paramagnetic metals Cu2+ and Co2+. IR and EPR studies on the bimetallic complexes and simplified model compounds support dpa-selective binding by both of these metals. The IR spectra have also been compared to those of diamagnetic Rh+, Zn2+