The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: Pentaerythrityltetrabromide( cas:3229-00-3 ) is researched.Reference of Pentaerythrityltetrabromide.Dikarev, Evgeny V.; Shpanchenko, Roman V.; Andreini, Kristian W.; Block, Eric; Jin, Jin; Petrukhina, Marina A. published the article 《Powder Diffraction Study of a Coordination Polymer Comprised of Rigid Building Blocks: [Rh2(O2CCH3)4·μ2-Se2C5H8-Se,Se’]∞》 about this compound( cas:3229-00-3 ) in Inorganic Chemistry. Keywords: rhodium acetate diselenaspiroheptane polymeric complex preparation structure; diselenaspiroheptane preparation structure complexation rhodium acetate; crystal structure rhodium acetate diselenaspiroheptane polymeric complex. Let’s learn more about this compound (cas:3229-00-3).
The crystal structure of a new hybrid product comprised of two rigid building blocks, dirhodium(II) tetraacetate, [Rh2(O2CCH3)4] (1), and 2,6-diselenaspiro[3.3]heptane, Se2C5H8 (2), was solved ab initio using laboratory source x-ray powder diffraction (XRPD) data. The rigid body refinement approach was applied to assist in finding an adequate model and to reduce the number of the refined parameters. [Rh2(O2CCH3)4·μ2-Se2C5H8-Se,Se’] (3) conforms to the triclinic space group P1̅, with a 8.1357(4), b 8.7736(4), and c 15.2183(8) Å, α 77.417(3), β 88.837(3), and γ 69.276(4)°, V = 989.66(8) Å3, and Z = 2. The final values of the reduced wRp, Rp, and χ2 were calculated at 0.0579, 0.0433, and 5.95, resp. The structure of 3 is a 1-dimensional zigzag polymer built on axial Rh···Se interactions at 2.632(6) Å. The 2,6-diselenaspiro[3.3]heptane ligand acts as a bidentate linker bridging dirhodium units via both Se atoms. The geometrical parameters of individual groups for rigid body refinement were obtained from x-ray powder data for 1 and from single-crystal x-ray diffraction for diselenium mol. 2. The crystal structures of 1 and 2 are reported here for the 1st time. For 1 indexing based on XRPD data resulted in the triclinic unit cell space group P1̅ with a 8.3392(7), b 5.2216(5), and c 7.5264(6) Å, α 95.547(10), β 78.101(6), and γ 104.714(13)°, and Z = 1. The final values were wRp = 0.0452, Rp = 0.0340, and χ2 = 1.99. The 1-dimensional polymeric motif built on axial Rh···O interactions of the centrosym. dirhodium units was confirmed for the solid-state structure of 1. Compound 2,6-diselenaspiro[3.3]heptane (2) conforms to the monoclinic space group P21/c with the unit cell parameters of a 5.9123(4), b 19.6400(13), and c 5.8877(4) Å, β 108.5500(10)°, and Z = 4.
This compound(Pentaerythrityltetrabromide)Reference of Pentaerythrityltetrabromide was discussed at the molecular level, the effects of temperature and reaction time on the properties of the compound were discussed, and the optimum reaction conditions were selected.
Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem