Original paper link: http://pubs.acs.org/doi/abs/10.1021/jacs.6b06983 http://pubs.acs.org/doi/abs/10.1021/jacs.6b06983 The paper mentions that in 1977 a Rober

Original paper link: http://pubs.acs.org/doi/abs/10.1021/jacs.6b06983 http://pubs.acs.org/doi/abs/10.1021/jacs.6b06983 The paper mentions that in 1977 a Robert Crabtree predicted that copper(I) would be a likely coordination site. Copper is a pretty reactive metal when it comes to sulfur, and lets it do all sorts of stuff. Here is a tangentially related post from In The Pipeline: http://blogs.sciencemag.org/pipeline/archives/2012/05/15/things_i_wont_work_with_selenophenol http://blogs.sciencemag.org/pipeline/archives/2012/05/15/thi... Which discusses some derivatives of selenium, the element directly below sulfur on the periodic table. From personal experience, you can get used to the way sulfur compounds smell. Amines, and other functional groups stay vile.