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A new route to synthesis of various mono-Nsubstituted hydrazines and hydrazides by involving in a new CÀ N bond formation by using N-amino-1,8-naphthalimide as a regenerated precursor was invented. Aniline and phenylhydrazines are reproduced upon reacting these individually with 1,8-naphthalic anhydride followed by hydrazinolysis. The practicality and simplicity of this CÀ N dihalo alkanes; developed a synthon for bond formation protocol was exemplified to various hydrazines and hydrazides. N-amino-1,8-naphthalimide is suitable synthon for transformation for selective formation of mono-substituted hydrazine and hydrazide derivatives. Those are selective mono-amidation of hydrazine with acid halides; mono-N-substituted hydrazones from aldehydes; synthesis of N-aminoazacycloalkanes from acetohydrazide scaffold and inserted to hydroxy derivatives; distinct synthesis of N,N-dibenzylhydrazines and N-benzylhydrazines from benzyl halides; synthesis of N-amino-amino acids from α-halo esters. Ecofriendly reagent N-amino-1,8naphthalimide was regenerated with good yields by the hydrazinolysis in all procedures.

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Specific surface area of cesium perchlorate has been determined by isotopic surface exchange, airpermeability, and microscopic methods. There is agreement between the values of specific surface area evaluated by air-permeability and microscopic methods. The results obtained by the isotopic surface exchange method are reproducible but are significantly greater than those obtained by the other methods, and the difference is attributed to the fact that while air-permeability and microscopic methods measure the external surface area, the surface exchange method measures the total surface area (external as well as internal) of solids.