six-membered

Synthesis of Triangular CQDs was accomplished by a rational synthesis of triangular CQDs by choosing a three-fold symmetric phloroglucinol (PG) as the reagent (a triangulogen), together with a tri-molecular reaction route designed into the neighboring active -OH and -H groups for six-membered ring cyclization, propagating to the target high color-purity Narrow Bandwidth Emission T-CQDs (NBE-T-CQDs).

Analytical and optimal synthesis of six-membered mechanism with dwell.

Alternatively, IM1 produces [P.sub.1] HOCN + [C.sub.2][H.sub.4] (-47.9 kcal/mol) through 1,5-H-transfer via a six-membered ring transition state TS2 (-31.4 kcal/mol).

The Schiff base ligand forms a five-membered ring of Ni1-O1-C1-C2-N1 and a six-membered ring of Ni1-N1-C10-C11-C12-O3 surrounding the Ni1 atom, in which the dihedral angle formed by the plane of the two rings is 3.821(80)[degrees].

Boroxines are a class of boron-oxygen compounds based on a six-membered ring:

2009).The dominant features of the N k-edge spectra include: (1) aromatic N in six-membered rings (pyridinelike C=N) at 398.14-398.88 eV, (2) nitrilic at 399.99-100.00 eV; (3) aromatic N in five-membered rings (pyrole-like C=N) at 399.92-400.03 eV; (4) amide-N with one oxygen substitution (N-C=O) at 400.67 eV; (5) amide-N with two oxygen substitution at 401.12 eV; (6) N with unpaired electrons in five-membered rings (2N) at 401.20-40142 eV; (7) N with unpaired electrons in five member rings (IN) at 402.13 eV; (8) N-bonded aromatic at 403.43-403.75 eV; and (9) Is [right arrow] [sigma]* N-H transition at 405.25-412.58eV.

Hydrogen of [beta]-carbon at alcohol side and oxygen of ester carbonyl groups formed intramolecular hydrogen bond by molecular movement, forming six-membered ring with C, O, and H atoms [13].

There is one intramolecular N1-H1A ***O3 hydrogen bond (Table-3) furnishing in the formation of one pseudo six-membered ring (O3-C7-N2-C6-N1-H1A).

These compounds are capable of forming five - or six-membered ring systems which would enhance the stabilities of the complexes formed with metals in favourable oxidation states.