EntityQ7485453· pop 21· linked from 246 articlesmethylene groupSign in to savefunctional groupConnectionsthioesterEntitymethineEntityhydrogenEntityoxygenEntitycarbonEntitynitrogenEntitysulfurEntityphosphorusEntitysiliconEntityboronEntityarsenicEntityseleniumEntityorganic chemistryEntitypoloniumEntitytelluriumEntityalcoholsEntitychemical bondEntityhydrocarbonEntitydigital object identifierEntityalkeneEntityCategoriesAlkanediyl groups