In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Synthesis and characterization of Lanthanum(III) complexes containing 4,4,4-trifluoro-1-(naphthalen-2yl)butane-1,3-dionate, published in 2020-03-15, which mentions a compound: 1762-34-1, Name is 5,5′-Dimethyl-2,2′-bipyridine, Molecular C12H12N2, Category: benzodioxans.
Seven La(III) complexes with the β-diketonate anion 4,4,4-trifluoro-1-(2-naphthyl)butane-1,3-dionato(1-) (ntfa) have been synthesized, namely: [La(ntfa)3(MeOH)3] (1a), [La(ntfa)3(H2O)2(EtOH)](EtOH) (1b), [La(ntfa)3(bipy)2] (2), [La(ntfa)3(Me2bipy)] (3), [La(ntfa)3(terpy)] (4), (NEt4)[La(ntfa)4] (5) and [La(ntfa)4Na(H2O)(EtOH)(Methyl-β-naphthylketone)] (6), where bipy = bipyridine, Me2bipy = 5,5′-dimethyl-bipyridine, terpy = terpyridine, NEt4+ = tetraethylammonium ion and structurally characterized. The tris-β-diketonate compounds 1a,b, 2-4 form neutral monomeric complexes with C. N. nine for 1a, 1b and 4, eight for 3, and ten in case of 2. The tetrakis-β-diketonato complexes 5 and 6 have coordination number eight.
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