Crystal structure of 2,6-bis-hydrazinopyridine dihydrate, its tosylate salt and 2,6-bis(3,5-di-tert-butylpyrazolyl)pyridine

Abstract

The crystal structures of the new compounds 2,6-bis-hydrazinopyridine dihydrate (2), its tosylate salt (3) and 2,6-bis-(3,5-di-tert-butylpyrazolyl)pyridine (4) were obtained by single-crystal X-ray diffraction. Crystallization of 2 occurs in the centrosymmetric monoclinic space group P21/c (No. 14) with a = 9.6218(18), b = 6.7331(12), c = 13.489(3); and β = 109.292(8)∘ and Z = 4. Crystallization of 3 occurs in the centrosymmetric monoclinic space group P21/c (No. 14) with a = 26.530(3), b = 16.6456(18), c = 9.9458(10) and β = 96.828(5) and Z = 8, while 4 crystallizes in P21/n (No. 14) with a = 15.0555(10), b = 10.4496(7), c = 16.9599(12) and β = 101.480(4) and Z = 4. These are the only structures for any bis-hydrazinopyridines reported to date. Details of the synthesis, structures and spectroscopic results are presented and discussed.