Direct template synthesis of a heterometallic CoIII/ZnII complex: The advantage of using a metal powder as a starting material

Tetraethylammonium trichlorido(N,N′-dimethylformamide-κO)zinc

“…In [ZnCl 3 (DMF)]anion, the zinc atom adopts a distorted tetrahedral geometry with a {three chloride and one oxygen} donor set involving the carbonyl oxygen O(1) of the N,N′-dimethylformide. Bond lengths to the metal atom are Zn 1 14Å, which agree well with those in [ZnCl 3 (LH)] (L = 1-(2-hydroxyethyl)-(2-aminoethyl-N 2 )-5-methylisocytosine) (Price et al, 1998) and [Co(L1)Cl 2 ][ZnCl 3 (DMF)] (L1 = 4,6,6-trimethyl-1,9-diamino-3,7-diazanon-3-ene) (Shevchenko et al, 2008). The tetrahedral coordination geometry around the zinc atom is considerably distorted, which is indicated by the Cl-Zn-Cl and O-Zn-Cl angles being in the ranges 104.46 (2)-116.71 (2) and 101.98 (5)-104.46 (5)°, respectively.…”

“…[ZnCl 3 (DMF)] (L1 = 4,6,6-trimethyl-1,9-diamino-3,7-diazanon-3-ene) (2.01 (1) Å) (Shevchenko et al, 2008). The [Et 4 N] + cation in the title compound has its expected structure as well as normal distances and angles, which will not be discussed further (Allen et al, 1987).…”

Redox processes as a route for the formation of an unusual structure of the Co(II)/Zn(II) complex isolated from the system: [Co(0)/Zn(II)-1-hydroxymethyl-3,5-dimethylpyrazole]

“…The present work was focused on the synthesis of a heteronuclear Co/Zn complex using 1-hydroxymethyl-3,5-dimethylpirazole (as the starting ligand) zerovalent cobalt (powder), ZnCl 2 , NH 4 I and dioxygen from the air. For our purpose we applied a synthetic pathway described earlier by Kokozay and co-authors [16][17][18]. It was found that the reagents in the defined experimental condition generated the redox reactions (1) and (2) …”

Synthesis, X-ray structure, and spectroscopic investigation of new Co(II)/Cd(II) complexes formed via the reaction of 1-hydroxymethyl-3,5-dimethylpyrazole and Co0, CdCl2, NH4I

“…Such compounds show slight antiferromagnetic behavior [19]. Herein, inspired by these studies, the novel polydentate ligand and heterodinuclear complex has been attempted to obtain in situ from the redox system [23][24][25] using zerovalent cobalt (powder), CdCl 2 , NH 4 I, and 1-hydroxymethyl-3,5-dimethylpyrazole as a starting ligand. Some physico-chemical properties of the obtained compound were determined.…”