288084-47-9Relevant academic research and scientific papers
Platinum(IV) tetraphenylporphyrin dibromide complexes: Synthesis, characterization, and electrochemistry
Mink,Voce,Ingersoll,Nguyen,Boggess,Washburn,Grove
, p. 1057 - 1062 (2000)
Platinum(IV) porphyrins of the type [Pt(IV) (p-X)4TPP]Br2 where (p-X)4TPP is a para-substituted tetraphenylporphyrin have been synthesized by direct oxidation of their Pt(II) precursors with Br2. Both the Pt(II) and Pt(IV) complexes have been characterized by visible and 1H NMR spectroscopy and their electrochemical properties. In both the oxidation and reduction processes, a substituent effect is evident, and the reduction of Pt(IV) → Pt(II) is identified. The oxidation and reduction potentials of the [Pt(IV) (p-X)4TPP] Br2 complexes are compared to those of the [Pt(II)(p-X)4TPP] precursors and [Pt(IV) (p-X)4TPP]Cl2 analogs. Addition of I2 or I- to Pt(II) porphyrins does not result in oxidative-addition to form Pt(IV) porphyrins. Instead, the addition of I- to [Pt(IV) (p-X)4TPP] Br2 results in the reduction of the platinum to form the corresponding [Pt(II) (p-X)4TPP)]. (C) 2000 Elsevier Science Ltd.
