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Shweta Thakur posted an Question
November 26, 2020 • 23:18 pm
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30 points
30 points
- IIT JAM
- Chemistry (CY)
Why with higher oxidation state d block elemants are stable for heavier elemants
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Dinesh khalmaniya 1
In group of d-block elements the oxidation state for heavier elements is more stable as the core (after removing valence electrons the remainder is called core) of these elements is unstable and hence can lose one or more electrons from the unstable core gives higher oxidation states. the factors that influence very high oxidation state in transition metal compounds are: relative ease of losing valence d-shell electrons without compromising the energetics. resulting high positive charge density on the metal leading to high solvation (hydration) energies. p-pi —-d-pi back-bonding resulting in further stabilization of Metal-ligand bond.
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sir samagh ni aarha
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variable oxidation state isme Hoti hai due to comparitive energy of ns and n-1 d
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Suman Kumar
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It is easier to excite 4d & 5d electron comparing 3d electron
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Sweta did you get this ?
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sir why it is easy to excite these electrons
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iska koi specific reason ni hai
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everyone give different reasons
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Outer electron are more easy to excite. Down the group ionisation energy decreases
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yes
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plz answer my next question
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Priyanshu kumar Best Answer
Higher oxidation states can be shown by the d block elements as they contain vacant d orbitals which can be used in making a bond later. The most stable electronic configuration is the target of every element to achieve. But due to high differences in energies in the lower s and p orbitals, the losing of energy by giving away electrons is more prominent in the d block elements especially the higher d block elements. Osmium shows+8 oxidation state and obtains an electronic configuration simiar to Xe similarly Cr in+6 and Mn in+7 aquire configuration similar to Ar.
Well the the fact that they show the higher oxidation state is highly attributed to their stability in that higher oxidation state , as they attain condition of high hydration enthalpy in some cases and mostly it is due to the fact that half filled and fully filled configuration of an atom are exceptionally stable as a result the atoms easily achieve those oxidation states in order to attain the stability.