“…The compounds [CuX(CAAC Me )] (X=Cl ( 1 ), Br ( 2 ), I ( 3 )), [Cu(CAAC Me ) 2 ]X (X=Cl ( 4 ), Br ( 5 ), I ( 6 ), PF 6 ( 7 )), [Cu(CAAC Me )(N^N)]PF 6 (N^N=2,2′‐bipyridine ( 8 ), 1,10‐phenanthroline ( 9 )), and [Cu 2 (μ‐SPh) 2 (CAAC Me ) 2 ] ( 10 ) were prepared according to Scheme . We isolated 1 – 3 by following previously reported procedures for related copper(I) CAAC complexes ,. However, we found that 4 – 6 , unlike their stable CAAC Et congeners,, rapidly decompose during the purification and recrystallization processes, despite the use of an inert atmosphere, and even in the solid state, giving 1 – 3 and free CAAC Me ligand.…”