Transition Metals and Coordination Compounds

Transition Metals and Coordination Compounds are one of the most important topics in JEE Mains and advanced due to the number of questions that arise from this topics. Let us first look at the trend of the questions over the years.

As you can see, an average of 3 questions appear in JEE Mains and JEE advanced from this topic. So it is important this topic is done well for the competitive exams. The learning approach most ideal would be to learn the d and f block as a whole. This includes trends, exceptions and important compounds formed by these elements. It is highly recommended that the d-block elements list is learnt thoroughly since it is quite handy while writing electronic configurations of the elements. Once the elements and the periodic trends are thorough, move onto the characteristics, naming and shape theories of transition elements. Questions from this topic as a whole involve nomenclature, shape prediction questions and questions related to periodic properties.


From the transition elements area, the periodic properties such as ionization enthalpies, electron gain enthalpies, melting and boiling points and electrode potential have to be studied thoroughly. Other than these, the magnetic properties and the magnetic moment calculation are also important parts of this area. Reasons why transition metals have unique properties like variable oxidation states and colored compounds have to be learnt. The important compound formed by transition elements are potassium dichromate and potassium permanganate.

When coming to the coordination compounds, nomenclature is extremely important. The rules of naming and its ligand names have to be strong. Calculation of the coordination number and the effective atomic number is also important. The six different types of isomerism have to also be learnt. These include Ionization isomerism, linkage isomerism, hydrate isomerism, coordination isomerism, geometrical isomerism and optical isomerism. The shapes of the compound and their analysis using valence bond theory is really important and special attention needs to be given for it. Another very important topic is the Crystal Field Theory and the Crystal field splitting energy. From this we get the spectro chemical series. Other topics include organometallic compounds and compounds like ferrocene, Willkinson’s catalyst, Zeigler-Natta catalyst and Zeises salts.