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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Pentaerythritol and trichloroacetyl chloride react to yield the tetrakis-trichloroacetate ester C(CH 2 -O 2 C-CCl 3 ) 4 , 5, which crystallizes in the triclinic space group [Formula: see text] with a = 9.874(2) Å, b = 11.811(2) Å, c = 12.858(3) Å, α = 114.35(3)°, β = 95.63(3)°, γ = 99.11 (3)°, and V = 1326.5(5) Å 3  for Z = 2. The molecule adopts a geometry in which the trichloroacetate chains fold to produce a flattened tetrahedron, giving a molecule of approximate D 2d  symmetry. Treatment of 5 with CO 2 (CO) 8  gave, as the highest molecular weight product, the tris-cluster complex C[CH 2 -O 2 C-CCo 3 (CO) 9 ] 3 (CH 2 -O 2 C-CCl 3 ), 6, rather than the tetra-cluster C[CH 2 -O 2 C-CCo 3 (CO) 9 ] 4 , 7. A space-filling model of 7, derived by replacing the CCl 3  groups in 5 by CCo 3 (CO) 9  moieties, exhibited considerable molecular crowding. Reaction of several 1,1,1-trichloroacetylacetonate salts with Co 2 (CO) 8  gave the corresponding cluster complexes of Co(II), Co(III), or Al(III). The uncomplexed cluster ligand CH 3 C(O)CHC(OH)CCo 3 (CO) 9 , 9, crystallizes in the orthorhombic space group Pna2 1  with a = 16.226(2) Å, b = 11.6300(10) Å, c = 9.919(2) Å, V = 1871.7(4) Å 3  for Z = 4. The direction of enolization of 9 has been studied by EHMO calculations. The tendency to enolize is also found in (benzoylacetone)Cr(CO) 3 , 17, which crystallizes in the tetragonal space group P4 3 2 1 2 with a = 10.0840(10) Å, b = 10.0840(10) Å, c = 25.387(5) Å, V = 2581.5(6) Å 3  for Z = 8. Keywords: inorganometallic clusters.

canadian journal of chemistry

Organic and inorganic templates bearing CCo3(CO)9 cluster fragments: X-ray crystal structures of C(CH2OCOCCl3)4 and of CH3C(O)CHC(OH)MLn where MLn = CCo3(CO)9 or (C6H5)Cr(CO)3