In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called Crystal engineering: synthesis and structural analysis of coordination polymers with wavelike properties, published in 2011-12-31, which mentions a compound: 14481-08-4, mainly applied to transition metal beta diketonate coordination polymer preparation crystal structure, Related Products of 14481-08-4.
Supramol. coordination polymers with wavelike structures were synthesized by self-assembly and their structures analyzed using the sine trigonometric function. Slow evaporation of a methylene chloride-methanol solution of a 1:1 M mixture of [M(tmhd)2], where M = Co or Ni, and quinoxaline; a 1:2:1 M mixture of [M(acac)2], where M = Co or Ni, 2,2,6,6-tetramethyl-3,5-heptadione and quinoxaline; or a 1:2:1 M mixture of [Co(acac)2], dibenzoylmethane, and quinoxaline, yielded the crystalline coordination polymers. In the presence of the nitrogenous base, ligand scrambling occurs yielding the most insoluble product. The synthesis and structures of the following wavelike polymers are reported: trans-[Co(DBM)2(qox)]n·nH2O (2), trans-[Co(tmhd)2(qox)]n (3), trans-[Ni(tmhd)2(qox)]n (4), where DBM- = dibenzoylmethanate, tmhd- = 2,2,6,6-tetramethyl-3,5-heptadionate, and qox = quinoxaline. The wavelike structures were generated by intramol. steric interactions and crystal packing forces between the chains. Some of the tert-Bu groups show a two-fold disorder. The sine function, φ = A sin 2πx/λ, where φ = distance (Å) along the polymer backbone, λ = wavelength (Å), A = amplitude (Å), x = distance (Å) along the polymer axis, provides a method to approx. and visualize the polymer structures.
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Reference:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics