So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Arakawa-Itoh, Machiko; Shibata, Masayo; Linert, Wolfgang; Fukuda, Yutaka researched the compound: 2,6-Dimethyl-3,5-heptanedione( cas:18362-64-6 ).Formula: C9H16O2.They published the article 《Steric crowding effect of 1,3-diketonates on the structures and the solution behaviors of nickel(II) mixed-ligand complexes》 about this compound( cas:18362-64-6 ) in Bulletin of the Chemical Society of Japan. Keywords: nickel diketonate bulky ligand diamine complex preparation structure; ligand strength nickel diketonate bulky ligand diamine complex; stability nickel diketonate bulky ligand diamine complex; crystal structure nickel diketonate bulky ligand diamine complex; mol structure nickel diketonate bulky ligand diamine complex. We’ll tell you more about this compound (cas:18362-64-6).
Seven nickel(II) mixed-ligand diketonate complexes, containing bulky substituents, [Ni(RCOCHCOR)(diamine)X] and [Ni(RCOCHCOR)(diamine)][Y] [R = Me, Et, iPr; amine = Me2NCH2CH2NMe2 (tmen), 1,1′-(1,2-ethanediyl)bis(piperidine) (dipe); X = NO3, Y = BPh4, BF4] were prepared The crystal structures were analyzed: nitrate complexes have a six-coordinated octahedral structure with a bidentate-coordinated NO3-, and each tetraphenylborate complex has a four-coordinated square-planar structure. The ligand field strength of [Ni(RCOCHCOR)(diamine)]BPh4 in the solid state increases in the order: [Ni(iPrCOCHCOiPr)(dipe)]BPh4 < [Ni(EtCOCHCOEt)(dipe)]BPh4 < [Ni(iPrCOCHCOiPr)(tmen)]BPh4 = [Ni(EtCOCHCOEt)(tmen)]BPh4. In solution, the change of the color depending on the donor/acceptor ability of the solvent, i.e., solvatochromism was observed When DMSO was added to a solution of [Ni(RCOCHCOR)(diamine)]BPh4 in inert 1,2-dichloroethane, the adduct formation constants are in the order: [Ni(iPrCOCHCOiPr)(dipe)]BPh4 < [Ni(EtCOCHCOEt)(dipe)]BPh4 << [Ni(iPrCOCHCOiPr)(tmen)]BPh4 = [Ni(EtCOCHCOEt)(tmen)]BPh4, reflecting the difference in steric hindrance of the ligands rather than the difference in ligand field strength. The steric crowding effect of 1,3-diketonates was observed in the solid state and solution when bulky dipe is used as diamine. There is still a lot of research devoted to this compound(SMILES：CC(C)C(CC(C(C)C)=O)=O)Formula: C9H16O2, and with the development of science, more effects of this compound(18362-64-6) can be discovered.
Reference:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica