Oxidovanadium(V) Complexes with Aminoethanol Bis(phenolate) [O,N,O,O′] Ligands: Preparations, Structures, N‐Dealkylation and Condensation Reactions

Abstract

The reactions between [VO(acac)

Vanadium Aminophenolate Complexes and Their Catalytic Activity in Aerobic and H2O2‐Mediated Oxidation Reactions

“…The terminal V=O bond length for both complexes are also consistent, but moderately shorter than the values that were reported for similar complexes . The V–O phenolate distances are in agreement with those of 1 , 2 and with those observed in related complexes , . Unfortunately, we were not able to isolate sufficient quantities of 5 and 6 to study in detail their behaviour in subsequent catalytic reactions.…”

“…This might be due to steric considerations when the orientation of the tert ‐butyl groups are taken into account. The longer V(1)–O(3) distance in 1 [2.2567(16) Å] implies weak binding of the ether group in the sidearm to the vanadium, and also reflects the trans effect of the oxo group, as has been observed in other complexes . The V–O phenolate distances are within the values that have been observed for these types of complexes previously , …”

Oxidomolybdenum(VI) complexes with aminoalcohol bis(phenolate) [O,N,O,O′] ligands: Synthesis and catalytic studies

“…For example, these phenolic compounds react with various Ti(IV) or Mo(VI) precursors to form the complexes with tetradentate trianionic O 3 N ligands, as all hydroxyl groups have been deprotonated [5,6]. Similarly, reactions of oxidovanadium(IV) and -(V) species lead to the formation of complexes with tripodal ligands although in some cases the complexation is accompanied with a side reaction leading to the degradation of the native ligand [7]. In contrast, the reactions of similar aminoalcohol bis(phenol)s with UO 2 2+ ion lead to the coordination as tridentate, dianionic O 2 N donor ligands via aminebis(phenolate) moieties, while the aliphatic OH groups remain intact [8].…”

Diverse Molecular Architectures of Si and Sn [4.4.3.01,6]Tridecane Cages Derived from a Mannich Base Possessing Semi‐Rigid Unsymmetrical Podands

“…Generally, "atrane-like" cages are comprised of two bridgehead atoms (M and N) connected by identical or different podand arms containing 3 and/or 4 atoms. [18][19][20][21][22] The additional N-M bond provides better chelation to stabilize the transition-metal coordination sphere [17,[23][24][25][26][27][28][29][30][31][32][33][34] and/or main-group metal compounds. [35][36][37] In the past, several main-group compounds and transition-metal complexes containing "atrane-like" structures with unsymmetrical podands and their derivatives have been reported.…”