SDS of cas: 1452-77-3. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. Compound: Picolinamide, is researched, Molecular C6H6N2O, CAS is 1452-77-3, about Bis-heteroleptic ruthenium(II) complex with 2-picolinamide: Synthesis, crystal structures, and spectroscopic study for anion recognition using the amide group. Author is Toyama, Mari; Fujii, Yudai; Endo, Mika.
Cis-[Ru(bpy)2(OH2)2](OTf)2 (1·(OTf)2; OTf- = CF3SO3-) was reacted with 2-picolinamide (H2pia) in EtOH to form bis-heteroleptic complex [Ru(bpy)2(H2pia)]X2 (2·X2; X- = OTf- or Cl-). Crystal structures of 2·X2 revealed that H2pia was coordinated to Ru(II) through N of pyridyl group and O of amide group to form the N,O-coordination, and acted as a neutral ligand. Bond distances around the amide group and 1H NMR study for 22+ suggested that π-electron on the carbonyl group was delocalized to the whole amide group. Adding F- to the acetonitrile solution of 2·(OTf)2 changed the red solution to dark-red due to the transportation of π-electron on the amide group by the bound F- to the amide H. Absorption and 1H NMR spectroscopies revealed that the NH2 of 22+ undergoes selective two-step adduct reaction with F-: the H close to pyridyl group of H2pia first formed a 1:1 adduct (mono-F-adduct-22+), followed by the other H forming the 1:2 adduct (di-F-adduct-22+). Adding excess Li(OTf) to these F-adduct-22+ solutions changed the dark-red solution back to red, suggesting that the adducted F- was removed by Li+ to form 22+ and LiF.
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Reference:
Tetrahydroisoquinoline – Wikipedia,
1,2,3,4-Tetrahydroisoquinoline | C9H11N – PubChem