In 2022,Wang, Yiran; Fukuda, Masayuki; Nikolaev, Sergey; Miyake, Atsushi; Griffith, Kent J.; Nisbet, Matthew L.; Hiralal, Emily; Gautier, Romain; Fisher, Brandon L.; Tokunaga, Masashi; Azuma, Masaki; Poeppelmeier, Kenneth R. published an article in Inorganic Chemistry. The title of the article was 《Two Distinct Cu(II)-V(IV) Superexchange Interactions with Similar Bond Angles in a Triangular “”CuV2″” Fragment》.Reference of 4,4′-Dimethyl-2,2′-bipyridine The author mentioned the following in the article:
The strength and sign of superexchange interactions are often predicted on the basis of the bond angles between magnetic ions, but complications may arise in situations with a nontrivial arrangement of the magnetic orbitals. We report on a novel mol. tetramer compound [Cu(H2O)dmbpy]2[V2O2F8] (dmbpy = 4,4′-dimethyl-2,2′-bipyridyl) that is composed of triangular “”CuV2″” fragments and displays a spin gap behavior. By combining first-principles calculations and electronic models, we reveal that superexchange Cu-V interactions carry drastically different coupling strengths along two Cu-F-V pathways with comparable bond angles in the triangular “”CuV2″” fragment. Counterintuitively, their strong disparity is found to originate from the restricted symmetry of the half-filled Cu dx2-y2 orbital stabilized by the crystal field, leading to one dominating antiferromagnetic Cu-V coupling in each fragment. We revisit the magnetic properties of the reported spin-gapped chain compound [enH2]Cu(H2O)2[V2O2F8] (enH2 = ethylene diammonium) containing similar triangular “”CuV2″” fragments, and the magnetic behavior of the mol. tetramer and the chain compounds is rationalized as that of weakly coupled spin dimers and spin trimers, resp. This work demonstrates that fundamentally different magnetic couplings can be observed between magnetic ions with similar bond angles in a single spin motif, thus providing a strategy to introduce various exchange interactions combined with low dimensionality in heterometallic Cu(II)-V(IV) compounds The experimental process involved the reaction of 4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6Reference of 4,4′-Dimethyl-2,2′-bipyridine)
4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6) is used as a chemical Intermediate. It can be used for the determination of ferrous and cyanide compounds.Reference of 4,4′-Dimethyl-2,2′-bipyridine Furthermore, 4,4′-Dimethyl-2,2′-bipyridine is used in the synthesis of a series of o-phenanthroline-substituted ruthenium(II) complexes.