Chemical rections don't always turn out, spawning unanticipated products or fizzling altogether. Although these flops rarely end up in papers, they can be instructive for other researchers attempting to duplicate a synthesis. That's the rationale behind the Chemistry Unpublished Papers Forum from the University of Pisa in Italy. The new site lets chemists report reactions that unexpectedly faltered or that released surprising products. After completing the free registration, visitors can post their lab woes or join discussions of more than a dozen troublesome reactions, such as copper nanoparticles' failure as catalysts. In the “Fake Chemistry” section, users can identify papers that they think show suspiciously high yields.