The Kinetics of Hydrogen-Induced Ligand-Substitution for Tris(ethylenediamine) Nickel (II) in Water

Material Information

Title:
The Kinetics of Hydrogen-Induced Ligand-Substitution for Tris(ethylenediamine) Nickel (II) in Water
Series Title:
Student Symposium 2017
Creator:
Giordano, Laurence ( Author, Primary )
Ghosh, Phalguni ( Advisor )
Rowley, Steven ( Advisor )
Lavey, Brian ( Advisor )
Middlesex College -- Department of Natural Sciences ( Sponsor )
Place of Publication:
Edison, NJ
Publisher:
Middlesex College
Publication Date:

Subjects

Subjects / Keywords:
College students -- poster presentations ( lcsh )
Student Works -- Natural Sciences -- poster presentations ( lcsh )
Chemistry ( lcsh )
Student works -- Natural Sciences -- academic theses
Middlesex College (Edison, NJ) -- Student works
Middlesex County College (Edison, NJ) ( lcsh )
Temporal Coverage:
Academic Year 2017-2018 ( 2017 - 2018 )
Spatial Coverage:
New Jersey -- Edison

Notes

Abstract:
When Tris(ethylenediamine) Nickel (II) is dissolved in an aqueous solution, the introduction of a strong acid will break the coordinate bonds between the ethylenediamine ligands and their central nickel atom and allow water molecules to coordinate with the nickel instead. Using a Stopped-Flow to observe the rates and absorbance spectra of the ligand substitution allowed for the kinetics and rate laws of the reaction. The analysis of the reaction showed that the overall reaction consisted of three irreversible stepwise reactions, with each stepwise reaction involving a single ethylenediamine molecule being replaced by two water molecules. The component spectra and concentration profiles of the four coordination complexes were observed over time and rate laws were determined. Using each reaction’s rate law, a set of equations were developed that model the concentration of each complex over timeand the rate constants were determined. With the d8 octahedral electron splitting of nickel(II) and the unique component spectra of each coordination complex, the energy difference between each higher and lower energy d-orbitalsetwas calculated.

Record Information

Source Institution:
Middlesex County College Institution
Holding Location:
Middlesex County College Institution
Rights Management:
All applicable rights reserved by the source institution and holding location.

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