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The reactions of stannylated and lithiated amines with coppersalts (halogenides, thiocyanates) lead to amido and imido bridged complexes which contain one to twelve metal atoms. [{Li(OEt2)}2][Cu(NPh2)3] (1) results from the reaction of CuCl with LiNPh2 in the presence of trimethylphosphine. With N(SnMe3)3, CuCl reacts to the donor-acceptor complex [ClCuN(SnMe3)3] (2) that is transformed into the tetrameric complex [{CuN(SnMe3)2}4] (3) by thermolysis. 3 can also be obtained by the reaction of LiN(SnMe3)2 with Cu(SCN)2. While terminally bound in 1, the amido ligand is mu2-bridging between copper atoms in compound 3. The influence of the alkyl amide’s leaving group can be seen from a comparison of the reactivity of Me3SnNHtBu and LiNHtBu, respectively. With Me3SnNHtBu, CuCl2 forms the polymeric compound 1?[Cu16(NH2 tBu)12Cl16] (4) whereas in the case of LiNHtBu with both CuCl and CuSCN, the complex [{CuNHtBu}8] (5) is obtained. The latter contains two planar Cu4N4-rings similar to those in 3. If a mesityl group is introduced at the lithium amide, different products are accessible. Both, CuBr and CuSCN, lead to the formation of [Li(dme)3][Cu6(NHMes)3(NMes)2] (6) whose anion consists of a prismatic copper core with mu2-bridging amido and mu3-bridging imido ligands. In the presence of.
The catalyzed pathway has a lower Ea, but the net change in energy that results from the reaction is not affected by the presence of a catalyst. In my other articles, you can also check out more blogs about 1111-67-7
Reference：
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”