Synthesis and Structural Characterization of β-Diketoiminate Complexes Containing Three-Coordinate Zinc and Copper Atoms

Abstract

Keywords: Acetylides / Copper / N ligands / ZincThe reaction of the lithium β-diketoiminate complex (dipp)NacNacLi·OEt 2 {(dipp)NacNac = 2-[(2,6-diisopropylphenyl)amino]-4-[(2,6-diisopropylphenyl)imino]pent-2-enyl} with ZnCl 2 yielded the corresponding (dipp)NacNacZnCl (1) and (dipp)NacNacZn(µ-Cl) 2 Li(OEt 2 ) 2 (1a). Treatment of 1 with LiCϵCPh and NaBH 4 in diethyl ether gave (dipp)NacNacZnCϵCPh (2) and (dipp)NacNacZn(µ-H) 2 BH 2 (3). The core element of compounds 1a−3 is a six-membered ZnN 2 C 3 ring. The structure of 1a shows the β-diketoiminate backbone in a boat conformation with the tetrahedrally coordinated metal centre in 1a at the prow and the opposing carbon atom at the stern. The zinc atoms in 2 and 3 show a planar

Solid-state and Solution Studies on a β-Diketiminate Zinc Hydride Complex

“…Complex 1a shows a crystallographic inversion center whereas 1b displays a crystallographically imposed C 2 axis. The C 3 N 2 Zn rings in both 1a and 1b are almost planar with the Zn atoms slightly out of the plane, as was previously observed in [Mes nacnacZn(µ-H)] 2 [5], DippnacnacZnH [7], DippnacnacZnN(SiMe 3 ) 2 [13], and DippnacnacZn(µ-H) 2 BH 2 [14]. In 1a, the almost planar C(CN) 2 Zn six-membered rings adopt a co-planar orientation, whereas in 1b the rings are twisted by 42.6 • as was observed for [Mes nacnacZn(µ-H)] 2 [5].…”

On the non-innocence of “Nacnacs”: ligand-based reactivity in β-diketiminate supported coordination compounds

“…Scheme 43) 109,111,113,[183][184][185][186][187]. Overall, these remarkable examples demonstrate the coordinative versatility of the BDI ligands.Additionally, a variety of p-block electrophiles have been shown to react with (BDI)Li salts at the γ-carbon of the BDI backbone to form diverse structures of which selected examples are reproduced in Scheme 44 70,[188][189][190][191][192][193][194][195].…”

Structural Organozinc Chemistry

“…A series of compounds with various organic groups bound to zinc, i.e. 181 266 , 182 267 , 183 266 , 184 266 and 185 268 ( Figure 90), have been prepared and were structurally characterized in the solid state. All compounds have comparable structural features.…”