ic402063f_si_002.cif (461.33 kB)
π‑Back-Bonding Interaction Depending on the Bridging Chain Lengths of Chelated N‑Heterocyclic Carbene Platinum Units in Heterometallic Trinuclear Complexes Affecting Their Electrochemical Property
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posted on 2014-01-21, 00:00 authored by Yuri Maeda, Hideki Hashimoto, Isamu Kinoshita, Takanori NishiokaNewly
synthesized heterometallic trinuclear M2Pt complexes (M
= Rh, Ir) containing a platinum moiety having a chelated bis-N-heterocyclic
carbene (bisNHC) ligand with a variety of alkylene chain lengths of
the bridging part showed two reversible reduction waves in cyclic
voltammetry. Only the second reduction potentials were affected by
the alkyl chain lengths, which afforded different dihedral angles
between the imidazolylidene rings and the platinum coordination plane
resulting in the variation of π-back-donation from the platinum
center to the carbene carbon atoms.
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carbene carbon atomsplatinum coordination planealkylene chain lengthsdihedral anglesalkyl chain lengthsimidazolylidene ringscyclic voltammetryElectrochemical PropertyNewlyheterometallic trinuclear M 2Pt complexesreduction wavesplatinum centerreduction potentialsBridging Chain LengthsHeterometallic Trinuclear Complexes Affectingplatinum moiety
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