... Tetrahedron. Volume 31, Issue 5, 1975, Pages 391–401. ... The substituents F, Cl, Br, CN, NO 2 , COOR, CONR 2 , P(O)R 2 do not interfere with the reaction of MoF 6 with aromatic aldehydes and ketones yielding gem-difluoro compounds, but OH, NH, OR, NR 2 , C C, react ...