%0 Journal Article
%A M. Ibrahim Al-Rafia, S.
%A Lummis, Paul A.
%A Ferguson, Michael J.
%A McDonald, Robert
%A Rivard, Eric
%D 2010
%T Low-Coordinate Germylene and Stannylene Heterocycles featuring Sterically Tunable Bis(amido)silyl Ligands
%U https://acs.figshare.com/articles/journal_contribution/Low_Coordinate_Germylene_and_Stannylene_Heterocycles_featuring_Sterically_Tunable_Bis_amido_silyl_Ligands/2721085
%R 10.1021/ic101485a.s002
%2 https://acs.figshare.com/ndownloader/files/4397038
%K iPr
%K 2C
%K 2Si
%K group 14 centers
%K chalcogen sources
%K sulfido complexes
%K steric protection
%K dimeric oxo
%K SiPh
%K Structural analyses
%K S 8
%K 3NO
%K Stannylene Heterocycles
%K metallylene
%K steric bulk
%K Dipp group
%K NSiN chelate
%X A series of monomeric heterocyclic metallylenes [{iPr2Si(NR)2}M:] (M = Ge and Sn; R = Dipp = 2,6-iPr2C6H3 or SiPh3) have been prepared. Preliminary atom-transfer chemistry involving the new low-valent germylenes with the chalcogen sources Me3NO and S8 yielded the corresponding dimeric oxo- and sulfido complexes (e.g., [{iPr2Si(NDipp)2}Ge(μ-E)]2; E = O and S). Structural analyses of the metallylenes and their oxidized products reveal that incorporation of the umbrella-shaped triarylsilyl groups (SiPh3) within the NSiN chelate confers additional steric protection about the group 14 centers relative to a Dipp group. The inclusion of sterically modifiable −SiAr3 (Ar = aryl) units as part of a bis(amido) ligand array represents a new approach in this field and holds considerable promise with regard to attaining increasingly higher degrees of steric bulk.
%I ACS Publications