Sodium thiosulfate preparation from sodium sulfite and sulfur - ChemPlayer
White phosphorus from red phosphorus - woelen
https://woelen.homescience.net/science/chem/exps/RedP2WhiteP/index.htmlHow to Make White Phosphorus | Extended version - Aussie Chemist
Hypophosphorus acid preparation (for alcohol -> alcane reduction) - ChemPlayer
Phenylacetic acid synthesis (from mandelic acid via H3PO2 red.) - ChemPlayer
Reduction of benzylic alcohols and α-hydroxycarbonyl compounds by hydriodic acid in a biphasic reaction medium
https://www.beilstein-journals.org/bjoc/articles/8/36A hydrogen sulfide generator using... a candle : wax+sulfur->H2S - Extractions&Ire
Reduction of Vanillin to Vanillyl Alcohol by BH4/borohydride - Rhodanide
Sodium Borohydride NaBH4 Reduction Reaction Mechanism - Leah4sci
GeH4: Germane - ChemicalForce