01404nas a2200181   4500008004100000022001400041245009700055210006900152260000900221300001400230490000700244520076400251100002401015700002301039700002401062700001901086856011701105       2021                        eng d  a0276-733300aAccess to a variety of Ge(II) and Sn(II) compounds through substitution of hypersilyl moiety0 aAccess to a variety of GeII and SnII compounds through substitut  cAUG   a2651-26570 v403 aWe have prepared amidinato-germylene (3) and -stannylene (4) with a tris(trimethylsilyl)silyl substituent and subsequently substituted the hypersilyl moiety by reacting 3 with chlorophosphines, which led to phosphino germylenes (5 and 6) with concomitant liberation of (Me3Si)(3)SiCl. Exploiting the fluoride affinity of the silicon atom, we have prepared pentafluoropyridyl germylene (7) and -stannylene (8) by reacting 3 and 4 with C5F5N with simultaneous elimination of (Me3Si)(3)SiF. These are the first examples of aryl germylenes or stannylenes prepared via C-F bond activation of a perfluoroarene. The reaction of 4 with Me3NO resulted in a novel Sn2O2 ring (9). All compounds were characterized by single-crystal X-ray structure determination studies.1 aBisai, Milan, Kumar1 aAjithkumar, V., S.1 aGonnade, Rajesh, G.1 aSen, Sakya, S.  uhttps://library.ncl.res.in/content/access-variety-geii-and-snii-compounds-through-substitution-hypersilyl-moiety