Answer :

(i)PdCl2∙4NH3 precipitates 2 moles of AgCl when AgNO3 is mixed. That means ionisable valency( primary valency) is 2 and the other 4 molecules of NH4 are in [coordinating sphere] with Pd and, hence secondary valency is four.


From the above explanation the structural formula of the complex comes out to be:


[Pd(NH3)4]Cl2


(ii) For IUPAC name of the complex, the oxidation state of the metal element to which compounds are coordinated has to be found out.


In the above case, it can be interpreted like [Pd(NH3)4]2+ 2Cl- and from this, if we focus on the cationic thing then we will gotta know that Pd oxidation state would be 2+ because of the charge present in cationic compound is of Pd and not NH3 as it has no charge.


Another major rule of IUPAC is to name initiating with cation followed by anion thing in that complex compound


IUPAC name of the complex is:


tetraamminepaladium(III)chloride


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