Anomalous Properties of Nitrogen and Preparation of Dinitrogen

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Deepak James

Anomalous properties of nitrogen and preparation of Dinitrogen Properties: Small size, High electronegativity and High ionisation energy Unique property: Formation of p pi - p pi bond Reactivity towards Halogen: Elements react to form to serious of Halides - Ex3 and Ex5. Nitrogen doesn't form pentahalide due to the non availability of the d orbitals NF3 is found to be more stable Reactivity towards Hydrogen ; Stability of hydride decreases from NH3 to BiH3 which can be observed from their bond dissociation energy. NH3 is mild reducing agent and BiH3 is strong reducing agent Preparation of Dinitrogen Commercial production: liquefaction and fractional distillation of air In laboratory :: NH4cl+NaNo2 -----> N2 +H20+ Nacl Pure nitrogen can be obtained by thermal decomposition of Barium aside Ba (N3)2-------> Ba+3N2