Ligand-based Reduction in a Molecular Rectangle with Four Organplatinum(IV) Vertices

0341529 - ÚFCH JH 2011 RIV DE eng J - Journal Article
Kavakli, C. - Schwederski, B. - Fiedler, Jan - Gudat, D. - Kaim, W.
Ligand-based Reduction in a Molecular Rectangle with Four Organplatinum(IV) Vertices.
Zeitschrift für anorganische und allgemeine Chemie. Roč. 636, č. 1 (2010), s. 114-120. ISSN 0044-2313. E-ISSN 1521-3749
R&D Projects: GA MŠMT OC09043; GA MŠMT OC 140
Institutional research plan: CEZ:AV0Z40400503
Keywords : electrochemistry * organometallic compounds * platinum
Subject RIV: CG - Electrochemistry
Impact factor: 1.247, year: 2010

A first organoplatinum(IV)-based molecular rectangle and bpyrn[{Pt(CH3)(3)}(4)(mu-eta(1):eta(1)-bp)(2)(mu-eta(2):eta(2)-bpym)(2)](4+) with bp = 4,4'-bipyridine and bpym = 2,2'-bipyrimidine has been obtained as tetrakis(triflate) in analogy to [{Re(CO)(3)}(4)(mu-eta(1):eta(1)-bp)(2)(mu-eta(2):eta(2)-bpym)(2)](4+), following the correspondence between the 5d(6) configured species [fac-Re-1(CO)(3)](+) and [fac-Pt-IV(CH3)(3)](+). Analytical data, H-1 and Pt-195 NMR spectroscopic as well as mass spectrometric results confirm the identity of the species. Cyclic voltammetry, EPR, and UV/Vis/NIR spectroelectrochemistry were used to investigate the sequence of reduction steps and the location of the electron uptake. Reduction involves first the bpym ligand in two 2-electron waves and then the bp bridge in discernible one-electron steps.
Permanent Link: http://hdl.handle.net/11104/0184479