STRUCTURALLY DIFFERENT METAL AMIDES (LI, CU, AG, CD) WITH THE CHELATING LIGAND [TBU-N-SIME2-O-C6H4-O-SIME2-N-TBU](2-)

The amino hydrogen atoms in the silylamine o-C6H4O2(Me2SiN(H)tBu)2 (1) can be replaced by monovalent (Li, Cu, Ag) or divalent (Cd) metallic elements. Whereas the lithium compound is obtained as an ether adduct, [C6H4O2(Me2SiNtBu)2]Li2 . 2 OEt2 (2), the copper and silver compounds are solvens-free. The latter two form similar dimers comprising four metal atoms: [C6H4O2(Me2SiNtBu)2]2Cu4 (3) and [C6H4O2(Me2SiNtBu)2]2Ag4 (4). The cadmium compound is also a dimer with two ligands and two ca dmium atoms making up the molecule, [C6H4O2(Me2SiNtBu)2]2Cd2 (5). X-ra y structure analyses reveal that in all compounds the metallic element s are highly coordinated by N and O interactions, with coordination nu mbers of 4 (2, 3, 4) and 5 (5). The oxygen contacts are quite long ran ging from 260 to 301 pm. In the Cu und Ag compounds quadratic planar a rrangements at the metals are found (bridged by nitrogen) with distanc es Cu-Cu 262.6(2) - 270.1(2) and Ag-Ag 291.7(1) - 301.8(2) pm.