Bis- and tris(2-seleno-1-methylimidazolyl)hydroborato complexes, {[BseMe]ZnX}2(X=Cl, I), [BseMe]2Zn and [TseMe]Re(CO)3: structural evidence that the [BseMe] ligand is not merely a "heavier" version of the sulfur counterpart, [BmMe].
New bidentate and tridentate ligands that feature selenium donors, namely the bis- and tris(2-seleno-1-methylimidazolyl)hydroborato ligands [BseMe] and [TseMe], have been constructed via the reaction of MBH4(M=Na, K) with 1-methylimidazole-2-selone. Comparison of the structure of {[BseMe]ZnI}2 with its sulfur counterpart, [BmMe]ZnI, demonstrates that the seleno ligand exhibits a greater tendency than the mercapto ligand to bridge two metal centers, while comparison of [TseMe]Re(CO)3 and [TseMes]Re(CO)3 indicates that the [TseMe] ligand is more electron donating and less sterically demanding than the [TseMes] ligand.
Landry
Victoria K
VK
Department of Chemistry, Columbia University, New York, New York 10027, USA.
Buccella
Daniela
D
Pang
Keliang
K
Parkin
Gerard
G