Self-assembling properties of (arylimido)vanadium(V) compounds

Thirty years through vanadium chemistry

“…Bio-inspired vanadium-catalyzed brominations in aqueous media in combination with H 2 O 2 (or O 2 ) HBr and KBr in aqueous media were also developed [249,250]. Low-valent vanadium compounds were also employed in reductive transformations [251,252].…”

Vanadium complexes derived from oxacalix[6]arenes: structural studies and use in the ring opening homo-/co-polymerization of ε-caprolactone/δ-valerolactone and ethylene polymerization

“…Given that the oxo group is isoelectronic with the imido group, [15] and that the latter can provide a useful NMR handle and can also be varied to alter the electronics, and to a lesser degree the sterics of the system, [5] we also prepared a number of organoimido containing vanadium complexes derived from L 1 H6. Our entry into this chemistry is via the organoimido trisalkoxides of the type [V(NAr)(OR)3] (R = tBu, iPr, nPr or Et) which…”

“…The known compounds L 1 H6, L 3 H3, [6]areneH6) (III), [(VO)2L 8 H] (L 8 H8 = p-tertbutylcalix [8]areneH8) (IV) and [VOL 4 ]2 (L 4 = 2,6-bis(3,5-tertbutyl-2-hydroxybenzyl)-4-tert-butylphenol) (V) were prepared by the literature methods. [7,9,15,16,22] All reactions were conducted under an inert atmosphere using standard Schlenk techniques. Toluene was dried from sodium, acetonitrile was distilled from calcium hydride, diethylether was distilled from sodium benzophenone, and all solvents were degassed prior to use.…”

Controlled coordination in vanadium(V) dimethylhydrazido compounds

“…Although vanadium(V) hydrazido compounds with phenoxide ligands have been investigated [33,36], vanadium(V) hydrazido compounds with alkoxide ligands have not been reported so far. Vanadium(V) imido compounds with alkoxide ligands are known to self-associate through -alkoxido-bridging [38][39][40][41][42][43][44][45]. The hydrazido and imido ligands coordinate through a metal-nitrogen multiple bond [46][47].…”

“…The p-substituent on the benzene rings of vanadium(V) arylimido compounds with isopropoxide ligands have been demonstrated to control the nature of the imido bonds through -conjugation [41][42][43][44][48][49], which regulates the self-association properties to form the -isopropoxidobridging or the -arylimido-bridging dinuclear compounds [41]. The self-association properties of vanadium(V) hydrazido compounds are expected to be controlled by the steric effects of alkoxide ligands.…”