Ferrocene as a ferromagnetic coupler. Synthesis and characterization of a ferrocene bridged polychlorotriphenylmethyl diradical

Organische gemischtvalente Verbindungen: ein Spielplatz für Elektronen und Löcher

“…Die Grenze zwischen Klasse II und III ist daher im Brennpunkt vieler Studien an anorganischen und organischen MV-Systemen. [4,17,79,[101][102][103] 2.5. Die Mulliken-Hush-Theorie und das Zweimodenmodell Die Marcus-Hush-Theorie beschreibt den ET-Prozess in einer Dimension, die sich auf eine gemittelte asymmetrische Schwingung des gesamten Systems bezieht.…”

Induced Self‐Assembly of a Tetrathiafulvalene‐Based Open‐Shell Dyad through Intramolecular Electron Transfer

“…Compound 4 was first obtained through a Horner-Wadsworth-Emmons reaction [9] of the protonated PTM derivative 2 [10] functionalized with a phosphonate group and the 2-formyltetrathiafulvalene 3 [11] using potassium tertbutoxide as a base. Subsequent deprotonation of 4 with potassium hydroxide in the presence of [18]-crown-6 yielded 5. Finally, the oxidation of 5 with silver nitrate afforded dyad 1, which is stable under ambient conditions and shows a remarkable solvatochromism ( Figure 1).…”

“…Scheme 3. Synthesis of dyad 1: a) Potassium tert-butoxide (1.1 equiv), THF, À78 8C, 70 %; b) KOH (10 equiv), [18]crown-6 (1 equiv), CH 2 Cl 2 , RT, 90 %; c) AgNO 3 , CH 2 Cl 2 /CH 3 CN (4:1), RT, 95 %. absorbance of the sharp radical band at 387 nm and the anionic band around 500 nm were plotted versus the acetone or DMF proportions ( Figure S2).…”

Polychlorotriphenylmethyl Radicals: Towards Multifunctional Molecular Materials

“…In conclusion, the metallocene unit in 6 was shown to effectively transmit a ferromagnetic interaction between two PTM radicals. 42 This result was justified by ZINDO/1 semiempirical calculations 43 where it was observed that the SOMO orbitals are almost degenerate and coextensive, justifying the high-spin ground state experimentally observed.…”