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Electronic interplay has been evidenced within a bimetallic complex involving two redox active bis(cyclopentadienyl)molybdenum dithiolene moieties connected to a fluorene linker by electrochemistry, spectroelectrochemistry together with DFT calculations. [Display omitted] A bimetallic metal complex involving a fluorene linker between two redox active bis(cyclopentadienyl)molybdenum dithiolene moieties has been synthesized and characterized by electrochemistry and spectroelectrochemistry. Cyclic voltammetry experiments show sequential oxidation of the two redox centers with small ΔE values between the first and the second redox processes and between the third and the fourth ones. Comparative electrochemical studies carried out using either [NBu 4 ][PF 6 ] or the poorly coordinating supporting electrolyte [Na][B(C 6 H 4 (CF 3) 2) 4 ] in dichloromethane indicate strong electrostatic effects on consecutive electron transfers, especially for highly charged species. Spectroelectrochemical investigations together with DFT calculations evidence that the two molybdenocene dithiolene electrophores are weakly electronically coupled through the organic bridge. [ABSTRACT FROM AUTHOR]

Ilio-caval fistula is a rare complication of lumbar disk surgery that may pose a real diagnostic challenge. We report a case of a 50-year-old woman with overlooked massive right ilio-caval fistula complicating lumbar surgery 6 years previously, and who presented with refractory right heart failure misdiagnosed as chronic pericarditis. The combination of right heart failure and a periumbilical murmur should alert clinicians to investigate with the appropriate imaging tests to confirm the diagnosis. < Learning objective: Ilio-caval fistula is a rare vascular complication of low lumbar disk surgery often overlooked, which explains the frequency of late discovery cases due to the semiological polymorphism of the presentation. The combination of right heart failure and a periumbilical murmur should alert clinicians to investigate with the appropriate imaging tests to confirm the diagnosis. The treatment could be based on surgery or endovascular intervention; the prognosis remains good in treated patients.> [ABSTRACT FROM AUTHOR]