LAUSR

Abstract Novel β-enaminoamide zinc complexes were synthesized by reacting N,N-diethy-3-(isobutylamino)-2-butenamide ( 1 ) and N,N-dimethy-3-(isobutylamino)-2-butenamide ( 2 ), with diethylzinc to afford the desired zinc bis (β-enaminoamidate) complexes 3 and 4 . Compounds 3 and 4 were recrystallized to afford high-quality single crystals which were characterized by single-crystal x-ray diffraction. Complex 3 , [C 24 H 46 N 4 O 2 Zn], crystallized as monomer in the triclinic space group P-1 with cell parameters: a = 10.5405(8) Å, b = 10.7725(9) Å, c = 13.3097(11) Å, α = 104.806(7)°, β = 106.642(7)°, γ = 104.704(7)°, V = 1309.8(2) Å 3 , Z = 2. Complex 4 , [C 20 H 38 N 4 O 2 Zn], also crystallized as a monomer in the monoclinic space group C with cell parameters: a = 17.0683(7) Å, b = 13.0259(3) Å, c = 11.5136(5) Å, α = γ = 90°, β = 116.400(5)°, V = 2292.86(15) Å 3 , Z = 4. Graphic Abstract The β-enaminoamide zinc complexes were obtained by reacting 2 equivalents of the appropriate free ligand with 1 equivalent of diethyl zinc to afford the desired β-enaminoamide zinc complex.