5/16/2019 · recently I did the following experiement ( Preparation of Vanadyl Acetylacetonate [VO ( acac ) 2 ], title is worng) and have to write up a report on it. In the procedures right at the begining it says add 2 .5g vanadium pentoxide in 6cm^3 water and add carefully to 4.5cm^3 H2SO4.
Synthesis and Structure of Oxovanadium(IV) Complexes [ VO ( Acac ) 2 ] and [ VO (Sal : L-alanine)(H2O)], V2O5 + 2H2SO4 + C2H6O + 4(Hacac) + 2Na2CO3 ? 2[VO(acac) 2] + 2Na2SO4 + C2H4O + 5H2O + 2CO2 V2O5 + 2H2SO4 + C2H6O + 4(Hacac) + 2K2CO3 ? 2[VO(acac) 2] + 2K2SO4 + C2H4O + 5H2O + 2CO2 2NH4VO3 + 3H2SO4 + C2H6O + 4(Hacac) + 2Na2CO3 ? 2[VO(acac) 2] + C2H4O + (NH4)2SO4 + 2Na2SO4 + 6H2O + 2CO2 VO(SO4) + 2(Hacac) + Na2CO3 ? [VO(acac) 2] + Na2SO4.
Title: Bioinorganic Chemistry: Preparation of Bis (acetylacetonato) oxovanadium (IV), [ VO ( acac ) 2 ] and its Pyridine adduct [ VO ( acac ) 2 Py]. Objective, Preparation of VO(acac)2. The preparation of VO(acac)2 started with 5ml of concentrated sulfuric acid (H2SO4) slowly added to 5 ml of deionized water in a 50 ml round-bottomed flask. Then, 18 ml of ethanol and followed by 2 g of vanadium pentaoxide (V2O5) was added into the round bottom flask. The solution was refluxed in an oil bath for an hour.
A two-step annealing procedure has been proposed to ensure control over VO ( acac ) 2 to VO2 conversion processes without changing the oxidation state of vanadium in the preparation of VO2 films by a …
Bis(acetylacetonato)oxovanadium (IV), also known as VO(acac) 2 or vanadyl acetylacetonate, was synthesized by reacting vanadyl sulfate and acetylacetone, then adding sodium bicarbonate as in the following reaction: [V(O)(H 2 O) 4 ]SO 4 + 2C 5 H 8 O 2 + Na 2 CO3 ? [V(O)(C 5 H 7 O 2 ) 2 ] + Na 2 SO 4 + 5H 2 O + CO 2 Bis(O,O’-diethyldithiophosphato)oxovanadium (IV), also known as VO(dtp) 2 , was.
The acac anion can act as a ligand towards metal ions, typically forming a bidentate complex where the metal is bound to the two oxygen atoms, thus forming a 6-membered ring. Metal acac compounds are typically isolated as crystalline solids that are neutral, hence an Mn+ metal forms a complex with n acac ligands (Figure 2 ).
from the equation below, I can get the theoretical mass of the [ Vo ( acac ) 2 (H2O)] solid complex by : V2O5 + 2H2SO4 + EtOH 2VOSO4 + 3H2O + CH3CHO VOSO4 + 2HC5H7O2 + Na2CO3 VO (C5H7O2) 2 + Na2So4 + H2O + CO2 From the above equation , 1 mol of V2O5 = 2 mol of VOSO4 2g 0f V2O5 = 0.011 mol = 0.022 mol of VOSO4 2 mol of VOSO4 = 2 mol of VO (C5H7O2) 2
