Platinum(ii) complexes of mixed-valent radicals derived from cyclotricatechylene, a macrocyclic tris-dioxolene.

ABSTRACT: Three complexes of cyclotricatechylene (H₆ctc), [{PtL}₃(μ₃-ctc)], have been synthesised: (L = 1,2-bis(diphenylphosphino)benzene {dppb}, 1; L = 1,2-bis(diphenylphosphino)ethane {dppe}, 2; L = 4,4'-bis(tert-butyl)-2,2'-bipyridyl { ^t Bu₂bipy}, 3). The complexes show three low-potential, chemically reversible voltammetric oxidations separated by ca. 180 mV, corresponding to stepwise oxidation of the [ctc]^6- catecholato rings to the semiquinonate level. The redox series [1]^0/1+/2+/3+ and [3]^0/1+/2+/3+ have been characterised by UV/vis/NIR spectroelectrochemistry. The mono- and di-cations have class II mixed valent character, with reduced radical delocal

SUBMITTER: Loughrey JJ 

PROVIDER: S-EPMC5951140 | biostudies-literature | 2015 Dec

REPOSITORIES: biostudies-literature