A Bidentate NHC-alkenyl ruthenium(II) complex via vinyl C-H bond activation.

International audienc

New Polypyridine Ligands Functionalized with Redox-Active Fe(II) Organometallic Fragments

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Tracking clinical staff behaviors in an operating room

Inadequate staff behaviors in an operating room (OR) may lead to environmental contamination and increase the risk of surgical site infection. In order to assess this statement objectively, we have developed an approach to analyze OR staff behaviors using a motion tracking system. The present article introduces a solution for the assessment of individual displacements in the OR by: (1) detecting human presence and quantifying movements using a motion capture (MOCAP) system and (2) observing doors’ movements by means of a wireless network of inertial sensors fixed on the doors and synchronized with the MOCAP system. The system was used in eight health care facilities sites during 30 cardiac and orthopedic surgery interventions. A total of 119 h of data were recorded and analyzed. Three hundred thirty four individual displacements were reconstructed. On average, only 10.6% individual positions could not be reconstructed and were considered undetermined, i.e., the presence in the room of the corresponding staff member could not be determined. The article presents the hardware and software developed together with the obtained reconstruction performances

Synthesis and Reactivity of 5-Bromopenta-2,4-diynenitrile (BrC 5 N) an Access to π-Conjugated Scaffolds

International audienceThe synthesis of 5-bromopenta-2,4-diynenitrile (BrC 5 N) in three steps from commercially available compounds is reported. Reacting 5-bromopenta-2,4-diynenitrile with secondary amines led to the formation of stable butadiynamines or enynenitriles, depending on the nature of the amine reactant. The reaction of 5-bromopenta-2,4-diynenitrile with simple terminal alkynes in the presence of secondary amines, copper, and palladium catalysts, provided a straightforward access to original polyfunctional carbon-rich scaffolds. In this work, different alkynes and secondary amines were tested, which allowed for the preparation of a family of substituted dienes. Given the high synthetic potential of 5-bromopenta-2,4-diynenitrile, we also prepared iodinated counterparts of this compound, that is, 5-iodopenta-2,4-diynenitrile and its lower homologue 3-iodopropiolonitrile. The UV-visible spectrum of some relevant compounds was also recorded