SIC3021 Inorganic Chemistry III Laboratory Manual

Using bulky ligands like triphenylphosphine to prevent the formation of reactive nickel(II) species, enabling interaction with biological targets.

A bulky ligand used in stabilizing metal complexes and catalysis.

A chemical reaction to produce NiCl2(PPh3)2.

Preparation of benzoic acid-(2-hydroxy-benzylidene)-hydrazide ligand.

Metal complexes containing different ligands attached to the central metal.

Highly pure form of acetic acid used in the synthesis reactions.

Catalysis that involves the catalyst in the same phase as the reactants

Catalytic processes using nickel as a catalyst.

A measure of how much a material gets magnetized when exposed to a magnetic field.

A type of magnetism where materials are weakly attracted to a magnetic field due to unpaired electrons.

A type of magnetism where materials are weakly repelled by a magnetic field because all electrons are paired.

A technique to measure the magnetic susceptibility of solid samples.

A technique for determining the magnetic susceptibility of solutions.

A highly sensitive magnetometer used for measuring magnetic fields.

The ability of a ligand to attract electrons from the central metal atom.

A central metal atom surrounded by ligands that are bonded to it.

A measure of how much a substance is attracted to a magnetic field. Paramagnetic substances are weakly attracted because they contain unpaired electrons.

A technique that uses radio waves and magnetic fields to determine the structure and properties of molecules. It is particularly useful for studying hydrogen atoms (protons) in molecules.

Subtracting the magnetic susceptibility contribution of the solvent from the overall magnetic susceptibility measurement to isolate the contribution specifically from the complex.

The susceptibility of a metal complex dissolved in a specific solvent, measured using NMR.

A simple equation used to predict the magnetic moment of a complex based on the number of unpaired electrons. It provides a good approximation but doesn't take into account orbital contributions.

The spin-only formula is most accurate for complexes where the metal ion has a single oxidation state and the ligands are weak field.

The complex should be stable in solution, and the solvent and reference should satisfy specific criteria. For example, the reference should not interact significantly with the complex.

Assess whether a complex can be successfully analyzed based on the specific solvent and reference used in the NMR experiment

A measure of how much a material gets magnetized per unit mass when exposed to a magnetic field. It incorporates the density of the substance.

A measure of how much a material gets magnetized per mole when exposed to a magnetic field. It accounts for the molecular weight and is independent of sample density.

Molar susceptibility (χM) is calculated by multiplying the mass susceptibility (χg) by the molecular weight (MW) of the substance: χM = χg x MW.

A correction applied to the measured molar susceptibility (χexp) to account for the inherent diamagnetic properties of the ligands and metal ions in a complex, resulting in a corrected molar susceptibility (χMcorr).

A measure of the overall magnetic moment of a substance, reflecting the contribution from both spin and orbital angular momentum of the electrons.

The effective magnetic moment (µeff) is calculated using the corrected molar susceptibility (χMcorr) and a formula involving the number of unpaired electrons (n).

A law stating that the magnetic susceptibility of a paramagnetic substance is inversely proportional to the absolute temperature. A system obeying Curie law has negligible orbital contribution to the magnetic moment.

The sample tubes used in magnetobalances are delicate and require careful cleaning. Conventional detergents, organic solvents, or strong acids (like HCl or HNO3) may be needed, depending on the sample.

The magnetic susceptibility of a material expressed per unit volume.

The three common ways to express magnetic susceptibility are volume susceptibility (χv), mass susceptibility (χm), and molar susceptibility (χM).

A technique for measuring the magnetic susceptibility of solid samples, involving measuring the force acting on a sample suspended in a magnetic field gradient.

Magnetic susceptibility provides information about the electronic structure of compounds, particularly transition metal and rare earth metal complexes.

A modern magnetic susceptibility balance that utilizes Evans' method and offers improved features for precise and efficient measurements.

There are two main types of magnetic behavior in materials: Paramagnetism and Diamagnetism.

Correlation diagrams that visualize the relationship between electronic state energies in a complex and the strength of the ligand field.