English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Open

Presents the pdf analysis as premium feature

PDF Analysis

Insights

Presents the summarisation as premium feature

Summarisation

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

The reaction of mixtures of Fe(O 2 CMe) 2 ·2H 2 O and Ni(O 2 CMe) 2 ·4H 2 O of various compositions with di-2-pyridyl ketone (py 2 CO, dpk) in MeCN under an inert atmosphere afforded a family of hetero-metallic enneanuclear clusters with general formula [Fe 9-x Ni x (μ 4 -OH) 2 (O 2 CMe) 8 (py 2 CO 2 ) 4 ] (2, x = 1.00; 3: x = 6.02; 4, x = 7.46; 5, x = 7.81). Clusters 2-5 are isomorphous to the homo-metallic [Fe 9 ] cluster (1) previously reported by some of us, and also isostructural to the known homo-metallic [Ni 9 ] cluster. All four clusters contain a central M II ion in an unusual 8-coordinate site and eight peripheral M II ions in distorted octahedral environments. The distribution of Fe II and Ni II ions over these two distinct coordination sites in 2-5 can be established through a combination of X-ray fluorescence and Mössbauer spectroscopies, which show that Fe II preferentially occupies the unique 8-coordinate metal site while Ni II accumulates in the octahedral holes. Density functional theory indicates that the distribution of ions across the two sites arises not from any intrinsic preference of the Fe II ions for the 8-coordinate sites, but rather because of the large ligand field stabilization energy available to Ni II in octahedral coordination.

Site preferences in hetero-metallic [Fe9−xNix] clusters: a combined crystallographic, spectroscopic and theoretical analysis

Site preferences in hetero-metallic [Fe_9−xNi_x] clusters: a combined crystallographic, spectroscopic and theoretical analysis