Due to availability of vacant orbitals of sufficiently low energy, d-block elements from complexes, d-block elements have different properties such $\mathrm{as}-\mathrm{catalytic}$, magnetic, alloy formation, interstitial compounds formation. Interstitial compounds are those compounds in which small atoms like carbon and boron fits into interstices of d-block element's crystal. In interstitial compounds, there is no chemical bond formation. Chemical properties remain almost the same, but physical properties may change.

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