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 Plus

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

Zendy Tools

Zendy Open

A new set of five unsymmetrical N,N'-diiminoacenaphthenes, 1-[2,6-{(4-FC 6 H 4 ) 2 CH} 2 -4-NO 2 C 6 H 4 N]-2-(ArN)C 2 C 10 H 6 (Ar = 2,6-Me 2 C 6 H 3 L1, 2,6-E 2 C 6 H 3 L2, 2,6- i Pr 2 C 6 H 3 L3, 2,4,6-Me 3 C 6 H 2 L4, 2,6-E 2 -4-MeC 6 H 2 L5), have been synthesized and used to prepare their corresponding nickel(ii) halide complexes, LNiBr 2 (Ni1-Ni5) and LNiCl 2 (Ni6-Ni10). The molecular structures of Ni3(OH 2 ) and Ni4 reveal distorted square pyramidal and tetrahedral geometries, respectively, while the 1 H NMR spectra of all the nickel(ii) (S = 1) complexes show broad paramagnetically shifted peaks. Upon activation with either methylaluminoxane (MAO) or ethylaluminum sesquichloride (E 3 Al 2 Cl 2 , EASC), Ni1-Ni10 displayed very high activities for ethylene polymerization with the optimal performance being observed using 2,6-dimethyl-containing Ni1 in combination with EASC (1.66 × 10 7 g PE mol -1 (Ni) h -1 at 50 °C) which produced high molecular weight plastomeric polyethylene (M w = 3.93 × 10 5 g mol -1 , T m = 70.6 °C) with narrow dispersity (M w /M n = 2.97). Moreover, Ni1/EASC showed good thermal stability by operating effectively at an industrially relevant 80 °C with a level of activity (6.01 × 10 6 g of PE mol -1 (Ni) h -1 ) that exceeds previously disclosed N,N'-nickel catalysts under comparable reaction conditions. This improved thermal stability and activity has been ascribed to the combined effects imparted by the para-nitro and fluoride-substituted benzhydryl ortho-substituents.

dalton transactions

Plastomeric-like polyethylenes achievable using thermally robust <i>N</i>,<i>N</i>′-nickel catalysts appended with electron withdrawing difluorobenzhydryl and nitro groups

Plastomeric-like polyethylenes achievable using thermally robust N,N′-nickel catalysts appended with electron withdrawing difluorobenzhydryl and nitro groups