What is Vo ACAC 2 used for?
VO(acac)21 is one the best and most extensively used catalysts for epoxidation of unsaturated alcohols. Mainly studied by Sharpless et al., 1/tert-butyl hydroperoxide (TBHP) was shown to be a highly regio- and stereoselective system for the epoxidation of allylic 10-12 and homoallylic alcohols.
In which reaction VO acac 2 used as reagent?
The vanadium-catalyzed epoxidation reaction (VO(acac)2/t-butyl hydroperoxide) has become a very popular procedure for the stereoselective epoxidation of acyclic homoallylic alcohols.
What is the oxidation state of vanadium in VO ACAC 2?
+IV
This has been confirmed by a more recent experimental work [8]. However, in the absence of spin traps (in benzene at 20 °C) the EPR spectrum measured just after mixing of reagents shows a signal which could be assigned to the coordinated VO(acac)2 – TBHP complex with vanadium in oxidation state +IV.
What is the coordination number of V in VO ACAC 2?
Compound 1 is five coordinate, which is common for vanadium species, particularly when a V_O bond is present. This is also seen for [VO(acac) 2 ], a five coordinate species in which the 4 carbonyl oxygen atoms take an almost planar geometry with the double bond perpendicular [63] .
What is the name of vo2+?
vanadyl
The vanadyl or oxovanadium(IV) cation, VO2+, is a functional group that is common in the coordination chemistry of vanadium.
What is the charge of ACAC?
-1
3.1Computed Properties
| Property Name | Property Value | Reference |
|---|---|---|
| Heavy Atom Count | 7 | Computed by PubChem |
| Formal Charge | -1 | Computed by PubChem |
| Complexity | 90.4 | Computed by Cactvs 3.4.6.11 (PubChem release 2019.06.18) |
| Isotope Atom Count | 0 | Computed by PubChem |
Why is vanadium a transition metal?
Vanadium has 5 valence electrons that can be lost. One of the characteristics of transition metal is their ability to adopt multiple oxidation states. Vanadium exhibits four common oxidation states +5, +4, +3, and +2 each of which can be distinguished by its color.
What factors control the coordination number?
Coordination number, C.N. depends on the relative size of the ions. If all of the atoms in a crystal are the same size, then there are two ways to pack the atoms to form a crystal structure. In this case, the maximum number of atoms that be coordinated around any individual is 12.
What Colour is VO2?
dark blue
Vanadium(IV) oxide or vanadium dioxide is an inorganic compound with the formula VO2. It is a dark blue solid.