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Photograv 3.0 Torrent 144. They are italian folkloric.. they're.Vibrational and electronic spectra of 2-benzoylpyridine and its interaction with a series of ditopic alkynylphosphines and alkynylphosphine oxides.
The low-energy (near)infrared spectra of 2-benzoylpyridine (2-Py) in the monomer and cocomplex with a series of ditopic alkynylphosphines (PPh3, P(C≡C)3, P(C≡C)(C≡C)2, P(C≡C)2(C≡C), and P(C≡C)(C≡C)(C≡C)) and alkynylphosphine oxides (P(O)3, P(C≡C)(O), P(C≡C)(C≡O), and P(C≡C)(O)2) have been investigated by FT-IR, Raman, and NIR spectroscopy, and by ab initio calculations. The electronic absorption of 2-Py appears to follow a polyene-like behavior. Based on the observed differences in the energy position of the overtone and combination band maxima and the positions of the intermolecular bands of the cocomplexes, it can be concluded that the formation of an extended π-conjugation is most probably induced by the interaction of the 2-Py molecules with the ditopic alkynylphosphines. Upon cocomplexation, the carbonyl group of 2-Py appears to be strongly activated, which probably leads to the observed lowering of the redox potential of the carbonyl group compared to that of the isolated monomer. The calculated redox potentials of 2-Py are in good agreement with the experimentally observed 0b46394aab