Dunn, J. G. published the artcileBidentate nature of 2-pyridinecarboxaldehyde 2-pyridylhydrazone in its complexes with metal carbonyls, Formula: C11H10N4, the publication is Inorganic and Nuclear Chemistry Letters (1969), 5(7), 539-43, database is CAplus.
Substituted metal carbonyls in which the title compound (paphy) (I) is acting as a bidentate donor have been prepared The compounds prepared were Cr(CO)4(paphy), Mo(CO)4(paphy), and W(CO)4-(paphy). Mo(CO)6 (0.2 g.) was refluxed with 0.15 g. I in 5 ml. Me2C(OMe)2 (II) for 30 min. under N. The solution colored to a maroon-purple. After 30 min. the solution was filtered hot and the solid product washed with II. The product was stable under normal laboratory conditions. Similarity in the CO stretching frequencies between the I compounds and the bipyridine complex Mo(cO)4(bipy) is evidence of the bidentate nature of the I ligand. Further evidence is the fact that the complexes are diamagnetic and nonelectrolytes in EtCN and MeNO2. Mo-(CO)4(paphy) reacts with (C6H5)3P to produce cis-Mo(CO)3-(paphy)(PPh3); ir CO stretching frequencies are quite similar to the analogous bipyridine complex.
Inorganic and Nuclear Chemistry Letters published new progress about 2215-33-0. 2215-33-0 belongs to pyridine-derivatives, auxiliary class Pyridine,Amine, name is 2-((2-(Pyridin-2-yl)hydrazono)methyl)pyridine, and the molecular formula is C11H10N4, Formula: C11H10N4.
Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem