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Frequently Asked Questions – FAQsQ1 Is [NiCl4]2− paramagnetic? Though both [NiCl4]2− and [Ni(CO)4] are tetrahedral, their magnetic characters are different. This is due to a difference in the nature of ligands. Cl- is a weak field ligand and it does not cause the pairing of unpaired 3d electrons. Hence, [NiCl4]2− is paramagnetic. Q2 Why is [Ni(CN)4]2- square planar? In presence of strong field CN– ions, all the electrons are paired up. The empty 4d, 3s and two 4p orbitals undergo dsp2 hybridization to make bonds with CN– ligands in square planar geometry. Thus [Ni(CN)4]2- is square planar. Q3 What is the IUPAC name of [NiCl4]2− negative? Tetrachloronickelate (II) ion is the metal complex with the formula [NiCl4]2−. Q4 What is nickel used for? Nickel is a silvery-white metal that is used mainly to make stainless steel and other alloys stronger and better able to withstand extreme temperatures and corrosive environments. Related Elements Hydrogen Neon Potassium Cobalt Helium Copper Sodium Calcium Lithium Zinc Magnesium Scandium Beryllium Gallium Aluminum Titanium Boron Germanium Silicon Vanadium Carbon Arsenic Phosphorus Chromium Nitrogen Selenium Sulfur Manganese Oxygen Bromine Chlorine Iron Fluorine Krypton Argon

Though both [NiCl4]2− and [Ni(CO)4] are tetrahedral, their magnetic characters are different. This is due to a difference in the nature of ligands. Cl- is a weak field ligand and it does not cause the pairing of unpaired 3d electrons. Hence, [NiCl4]2− is paramagnetic.

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Nickel is a silvery-white metal that is used mainly to make stainless steel and other alloys stronger and better able to withstand extreme temperatures and corrosive environments.

Ni2+ undergoes sp3 hybridization to make bonds with Cl– ligands in a tetrahedral geometry. As there are unpaired electrons in the d-orbitals, [NiCl4]2− is paramagnetic and is referred to as a high spin outer orbital complex. Therefore [NiCl4]2− are tetrahedral.

In presence of strong field CN– ions, all the electrons are paired up. The empty 4d, 3s and two 4p orbitals undergo dsp2 hybridization to make bonds with CN– ligands in square planar geometry. Thus [Ni(CN)4]2- is square planar.