Question

stereo chemistry of nitrogen containing compounds
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Answer 1

Nitrogen is tetracoordinate in ammonium salts and tricoordinate in amines and exhibits chirality with this coordination in organic compounds. Substituted quaternary ammonium compounds (I) and N-oxides (II) are examples of tetracoordinate chiral center

Answer 2

Explanation:

Abstract

A novel family of chelating bis-bidentate azodye compounds1 with Cu(II), Co(II), Ni(II), Fe(II), Hg(II), Pd(II), UO2(II), Fe(III), Cr(III), La(III), Ru(III) and Zr(IV) has been prepared and characterized on the basis of analytical, magnetic, 1H and 13C NMR, EPR and electronic spectral studies. Tentative structures for the polymeric complexes are proposed. The important IR bands and the main 1H and 13C signals are assigned and discussed relative to the molecular structure.