nickel complex from Schiff base ligand
Abstract
Pyrorle-2-aldehyde and 1,3-diaminopropane react under reflux to form a transition metal ion of Nickel(II), that further more react with nickel acetate to form red crystals through condensation, the colour being constituded by the congugated bonds. These series of reactions synthesize the Schiff Base ligand and Nickel(II) complex of the Schiff base ligand. 0.36g of the Schiff base ligand is yielded and 0.1g of the nickel complex is yielded from the 0.36g Schiff base ligand and 0.5g nickel acetate.
Introduction
We perform two separate reactions in this experiment in order to obtain Schiff Base Ligand that will substitute the ligands of a nickel hydrated complex. Like the majority of the common transition metals, during the reaction of nickel metal reaction, nickel metals tend to form an ion with a charge of 2+. This helps it to form complexes because of the empty orbitals it has around it. This nature of the metals allows it to bond with compounds through lone pairs, which is scientifically known as the dative bonding.
On the second part of this experiment we react the Schiff base ligand with hydrated nickel complex, this will allow us to form new nickel complex which is known as. We do this through condensation and substitution from the hydrated nickel complex.
Results and discussion
During the mixing of pyrrole-2-aldehyde with ethanol and 1,3-diaminopropane we obtain a colourless solution. As it is being heated under reflux, colour change is observed, the solution starts to change into orange-red solution. This is due to the fact that nickel ions are being suspended in the solution. After 4 minutes of heating under reflux, we finally cool it for 1 hour 30 minutes in ice bath, after this period of time yellow crystals start to form at the bottom of the round bottomed flask. After the filtering of these crystals, the remain yellow and after being rinsed with diethyl ether they change into a light yellow colour.
We than dissolve these
Pyrorle-2-aldehyde and 1,3-diaminopropane react under reflux to form a transition metal ion of Nickel(II), that further more react with nickel acetate to form red crystals through condensation, the colour being constituded by the congugated bonds. These series of reactions synthesize the Schiff Base ligand and Nickel(II) complex of the Schiff base ligand. 0.36g of the Schiff base ligand is yielded and 0.1g of the nickel complex is yielded from the 0.36g Schiff base ligand and 0.5g nickel acetate.
Introduction
We perform two separate reactions in this experiment in order to obtain Schiff Base Ligand that will substitute the ligands of a nickel hydrated complex. Like the majority of the common transition metals, during the reaction of nickel metal reaction, nickel metals tend to form an ion with a charge of 2+. This helps it to form complexes because of the empty orbitals it has around it. This nature of the metals allows it to bond with compounds through lone pairs, which is scientifically known as the dative bonding.
On the second part of this experiment we react the Schiff base ligand with hydrated nickel complex, this will allow us to form new nickel complex which is known as. We do this through condensation and substitution from the hydrated nickel complex.
Results and discussion
During the mixing of pyrrole-2-aldehyde with ethanol and 1,3-diaminopropane we obtain a colourless solution. As it is being heated under reflux, colour change is observed, the solution starts to change into orange-red solution. This is due to the fact that nickel ions are being suspended in the solution. After 4 minutes of heating under reflux, we finally cool it for 1 hour 30 minutes in ice bath, after this period of time yellow crystals start to form at the bottom of the round bottomed flask. After the filtering of these crystals, the remain yellow and after being rinsed with diethyl ether they change into a light yellow colour.
We than dissolve these
References: 1. P.Y. Bruice, Organic Chemistry, Pearson, Pentric Hall 5th ed. 2004 2. M. Alley, The craft of scientific writing, 3rd ed