Question

(i) $F{e^{3 + }}$ ion is bound with six cyanide ions.
(ii) $N{i^{2 + }}$ ion is bound with four chloride ions.
Write the IUPAC name, type of hybridisation and magnetic behaviour of the above coordination entities.
[Atomic No. : Fe = 26, Ni = 28]

Answer 1

A coordination complex consists of a central atom or ion, which is surrounded by a number of bound molecules or ions that are known as ligands or complexing agents. The central atom when bonded with the ligand forms a coordination complex that is a coordinate compound.

Complete Step by step solution
The international union of pure and applied chemistry that is IUPAC, it is an international federation of national adhering organization and represents chemists in individual countries.
International union of pure and applied chemistry that is IUPAC name of iron with six cyanide ions is Hexacyanoferrate (II).
International union of pure and applied chemistry that is IUPAC name of nickel bound with four chloride ions is tetrachloride nikelate (II).
Orbital hybridisation is the concept of mixing atomic orbitals into new hybrid orbitals, the new hybrid orbitals have different energies, different shapes compared to the original orbitals of the element. The new hybrid orbitals are suitable for pairing electrons to form chemical bonds in valence bond theory.
$F{e^{ + 3}}$ undergoes hybridisation and the type of hybridisation it undergoes is ${d^2}s{p^3}$ .
$N{i^{ + 2}}$ undergoes hybridisation and the type of hybridisation it undergoes is $s{p^3}$ .
Magnetic properties arise from the spin and angular momentum of the electrons contained in a compound. Diamagnetic compounds or elements are said to be diamagnetic when they contain no unpaired electrons. The compound or element is said to express paramagnetic when one or more unpaired electrons are present.
$F{e^{ + 3}}$ has one lone pair, so it is paramagnetic in nature.
$N{i^{ + 2}}$ is paramagnetic in nature.

Note
Coordination compounds can be neutral, positive or negative. The nature of coordination compounds depends on the ligand to which it has been attached. Coordination compounds are formed when electron rich ligands donate a pair of electrons to the central metal atom and form a coordinate bond. These bonds do not break in aqueous solutions.