Crystal structure of 1,3-di-2-[(4-methoxyphenyl)-1-diazenyl]imidazolidine

The crystal and molecular structure of 1,3-di-2-[(4-methoxyphenyl)-1-diazen yl]imidazolidine (1) has been determined by single crystal X-ray diffractio n analysis. This novel bis-triazene assumes a close-to planar structure wit h the aryltriazene moieties aligned in diametrically opposed directions, un like many other previously reported bis-triazenes, which assume a folded st ructure. The structure of 1 is compared with the closely related, non-cycli c bis-triazene analogue (2), and also compared with the structure of the si mple mono-triazene (3). Crystal data: 1 C17H20N6O2, monoclinic, space group C2/c, a = 34.948(3), b = 5.925(5), c = 8.1225(6) Angstrom, beta = 100.8420 (10)degrees and V = 1652.0(2) Angstrom(3), for Z = 4.