Lichtenberger, Dennis L.; Subramanian, Lalitha; Bunz, Uwe; Vollhardt, K. Peter C. published an article about the compound: Pentaerythrityltetrabromide( cas:3229-00-3,SMILESS:BrCC(CBr)(CBr)CBr ).Computed Properties of C5H8Br4. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:3229-00-3) through the article.
Through-space and through-bond interactions between π orbitals in the mols. hepta-1,6-diyne (A), 3,3-diethylpenta-1,4-diyne (B), 4,4-diprop-2-ynylhepta-1,6-diyne (C), 2,2-bis(bromomethyl)-1,3-dibromopropane (D) and 4,4-diethynylhepta-1,6-diyne (E) have been studied using gas-phase HeI photoelectron spectroscopy. The assignments of the photoelectron bands are discussed in relation to the results of extended Hueckel calculations Mixing of the π orbitals with the σ bond framework of the mols. is revealed by broadened band profiles in the π ionization region. Detailed examination of the first ionization of A suggests that one conformation is predominant under the conditions of the experiment The terminal π orbitals are separated by too great a distance for through-space interaction, so the spread of the ionization band is entirely from through-bond interactions. The low-energy ionizations of B correspond to the in-plane and out-of-plane sym. and antisym. combinations of the four terminal π orbitals, each of which has a different interaction with the C-H and C-C bonds of the central carbon atom. The spectra of C and D are very similar to each other, even though C has only alkyne substituents and D has only bromine substituents. The spectrum of E is a complicated mix of some of the features of A and some of the features of B. Extended Hueckel calculations help clarify the number of orbitals in this region and the nature of the orbital interactions.
In addition to the literature in the link below, there is a lot of literature about this compound(Pentaerythrityltetrabromide)Computed Properties of C5H8Br4, illustrating the importance and wide applicability of this compound(3229-00-3).
Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem