States suspending standardized tests as schools close

Closing schools to combat the spread of the coronavirus is having a sweeping impact on an annual rite of spring: the standardized tests that are dreaded by millions of students and teachers alike.

Cyclic hypervalent bromines act as aryne precursors

Diaryl λ3-bromanes are a rare and generally unresearched class of compounds. A mild and efficient protocol now delivers a broad palette of these interesting building blocks for organic synthesis. As a French research team ...

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