Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: Diphenyl-2-pyridylphosphine, is researched, Molecular C17H14NP, CAS is 37943-90-1, about Crystal structures and Hirshfeld surface analysis of [κ2-P,N-{(C6H5)2(C5H5N)P}Re(CO)3Br]·2CHCl3 and the product of its reaction with piperidine, [P-{(C6H5)2(C5H5N)P}(C5H11N)Re(CO)3Br].Related Products of 37943-90-1.
The coordination of the ligands with respect to the central atom in the complex [ReBr(C17H14NP)(CO)3]·2CHCl3 (I·2CHCl3), is best described as a distorted octahedron with three carbonyls in a facial conformation, a bromide atom, and a biting P,N-diphenylpyridylphosphine ligand. Hirshfeld surface anal. shows that C-Cl···H interactions contribute 26%, the distance of these interactions are between 2.895 and 3.213 Å. The reaction between I and piperidine (C5H11N) at 313 K in dichloromethane leads to the partial decoordination of the pyridylphosphine ligand, whose pyridyl group is replaced by a piperidine mol., and the complex [ReBr(C5H11N)(C17H14NP)(CO)3]. The mol. has an intramol. N-H···N hydrogen bond between the non-coordinated pyridyl nitrogen atom and the amine hydrogen atom from piperidine with D···A = 2.992 (9) Å. Now, II seems to lose solvent and piperidine (12% of mass) between 427 and 463 K, while the addnl. 33% loss from this last temperature to 573 K corresponds to the release of 2-pyridylphosphine. The contribution to the scattering from highly disordered solvent mols. in II was removed with the SQUEEZE routine [Spek (2015). Acta Crystalline C71, 9-18] in PLATON. The stated crystal data for Mr, μ etc. do not take this solvent into account.
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Reference:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem