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/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

In the crystal of the title polymeric complex, [Ni(2)(C(18)H(4)O(10))(C(10)H(8)N(2))(H(2)O)(8)](n), each Ni(II) cation is coord-in-ated by four water mol-ecules in the equatorial plane, and is further bridged by an 9,10-dioxo-9,10-dihydro-anthracene-1,4,5,8-tetra-carb-oxy-l-ate anion and a 4,4'-bipyridine ligand in the axial directions, forming a distorted octa-hedral geometry. The 9,10-dioxo-9,10-dihydro-anthracene-1,4,5,8-tetra-carboxyl-ate anion is centrosymmetric with the centroid of the quinone ring located about an inversion center; the 4,4'-bipyridine ligand is also centrosymmetric with the mid-point of the C-C bond linking two pyridine rings located about another invertion center. The 9,10-dioxo-9,10-dihydro-anthracene-1,4,5,8-tetra-carboxyl-ate anion and bypiridine ligand bridge the Ni(II) cations, forming a polymeric chain along the b axis. π-π stacking is observed between pyridine and benzene rings [centroid-centroid distance = 3.705 (2) Å]. All of the coordinating water mol-ecules are involved in O-H⋯O hydrogen bonding.

acta crystallographica. section e

catena-Poly[[tetraaquanickel(II)]-μ-(9,10-dioxo-9,10-dihydroanthracene-1,4,5,8-tetracarboxylato)-κ2O1:O8-[tetraaquanickel(II)]-μ-4,4′-bipyridine-κ2N:N′]