“…221 °C. ,,, However, one can raise the question of whether there is any dissolution or other speciation of (Se 0 ) n under the 221 °C reaction conditions. Literature studies support the claim of dispersed selenium particles, but moderate solubility has only been observed for select solvents, ,,− most notably carbon disulfide, , hydrazine, and ethylenediamine, but with significantly higher solubility (38 wt % gray selenium) recorded in a binary thiol-amine mixture under ambient conditions . In our own hands, some indirect evidence for a dispersion of Se 0 species is observed in an Se/ODA temperature control (Figure S29), where a color transition is noted only after the melting point to a color distinctly different from the clear solution when Cu 3– x P is present.…”