Career opportunities within science and technology are seeing unprecedented growth across the world, and those who study chemistry or another natural science at university now have increasingly better career prospects. , Related Products of 99-09-2, 99-09-2, Name is 3-Nitroaniline, molecular formula is C6H6N2O2, belongs to naphthyridine compound. In a document, author is Nicolay, Amelie, introduce the new discover.
A dicopper complex featuring a symmetrically bridging nitrile ligand and supported by a binucleating naphthyridine-based ligand, [Cu-2(mu-eta(1):eta(1)-MeCN)DPFN](NTf2)(2), was treated with phosphaalkynes (RC P, isoelectronic analogues of nitriles) to yield dicopper complexes that exhibit phosphaalkynes in rare mu-eta(2):eta(2) binding coordination modes. X-ray crystallography revealed that these unusual tilted structures exist in two isomeric forms (R up vs. R sideways), depending on the steric profile of the phosphaalkyne’s alkyl group (R = Me, Ad, or Bu-t). Only one isomer is observed in both solution and the solid state for R = Me (sideways) and Bu-t (up). With intermediate steric bulk (R = Ad), the energy difference between the two geometries is small enough that both are observed in solution, and NMR spectroscopy and computations indicate that the solid-state structure corresponds to the minor isomer observed in solution. Meanwhile, treatment of [Cu-2(mu-eta(1):eta(1)-MeCN)DPFN](NTf2)(2) with 2-butyne affords [Cu-2(mu-eta(2):eta(2)-(MeC CMe))DPFN](NTf2)(2): its similar ligand geometry demonstrates that the tilted mu-eta(2):eta(2) binding mode is not limited to phosphaalkynes but reflects a more general trend, which can be rationalized via an NBO analysis showing maximization of pi-backbonding.
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Reference:
1,8-Naphthyridine – Wikipedia,
,1,8-Naphthyridine | C8H6N2 – PubChem