The oxygen scavenging properties of alkali metal-containing organometallic compounds

Tris(organozinc) Phosphazenates as Templates for Trimeric and Hexameric Zinc Oxide Clusters

“…When 4·1.5 H 2 O [10] was treated with 4.5 equivalents of Et 2 Zn with the aim of producing a {(ZnO) 3 } ring complex, only an indistinct product mixture was obtained. On the other hand, when the trihydrate of (iBuNH) 6 P 3 N 3 (6·3 H 2 O), [10] which features the less bulky isobutyl groups, was treated with six equivalents of Et 2 Zn to form a {(ZnO) 6 } complex, the product 7 contained a {(ZnO) 3 } unit similar to that found in 3. [7] The eclipsed ligand arrangement forces the {(ZnO) 3 } ring of 3 into a planar conformation that shows minimal deviation from the mean plane (0.007(1) ), whereas the staggered arrangement in 5 enables the six-membered rings of the {(ZnO) 6 } prisms to pucker slightly into a chair-conformation (0.054(1) ).…”

“…Subsequently, it was treated with 4.5 equivalents of Et 2 Zn in hexane, thus giving a singlet at d = 26.1 ppm in the 31 P NMR spectrum. The crystal structure of the product complex 3 shows a planar {(ZnO) 3 } ring sandwiched between two B segments ( Figure 1). [7] The cyclohexyl (Cy) derivative (CyNH) 6 P 3 N 3 (4) crystallized as the pentahydrate 4·5 H 2 O from THF/ water.…”

The Directed Lithiation of Benzenoid Aromatic Systems

“…[57] The dilithiated sulfone 2-[(Me 3 Si) 2 C(Li·OEt 2 )SO 2 ]C 6 H 4 Li·OEt 2 (42) has been reported, wherein both O-directed ortholithiation (the solidstate structure reveals LiϪC ortho and LiϪO coordination) and deprotonation of the sulfone α-carbon are seen. [58] Reaction of racemic EtS(ϭO)(Ph)ϭNMe with nBuLi/ TMEDA in the presence of a trace oxide source [59] yields the heterochiral mixed α-mono-and α,orthodilithiated (43), [60] the solidstate structure of which reveals chiral resolution. Consequently, the aggregate is composed of two (S)-configured α-metallated sulfoximine monoanions and two (R)-configured α,orthometallated dianions.…”

Synthesis, structure and characterization of neat Zn2(OH)2 diamond-core chains linked through 2,2′,4,4′-biphenyl-tetracarboxylate

“…High oxidation-state metal hydroxide/oxide complexes exhibit a variety of frameworks, in which the metal centers are shielded by anionic organic ligands. Complex hydroxide/oxides of +I and +II metal ions bearing more than two hydroxide/oxide centers are rare [9,10]. Oxygen bridged dimetal complexes M 2 (l-X) 2 (X = O, OH, or OH 2 ) is called diamond-core.…”