An X-ray Crystallographic Study of 1,4-Di[(E)-2-(p-tolyl)-1-diazenyl] piperazine

作者：Little Vanessa Renee; Bertolasi Valerio; Vaughan Keith^*

来源：Journal of Chemical Crystallography, 2010, 40(10): 807-811.

DOI：10.1007/s10870-010-9740-8

• Triazene
• Bis-triazene
• Tolyl group
• X-ray
• Diazonium coupling

The crystal structure of methyl 1,4-di[(E)-2-(p-tolyl)-1-diazenyl] piperazine (4) has been determined by single crystal X-ray diffraction analysis. The bis-triazene (4) adopts a normal chair conformation in the piperazine ring, with puckering parameters : phi(2) = -29(5)degrees, Q(T) = 0.534(2) angstrom and theta(2) = 177.0(2)degrees. The crystal structure of 4 is compared with the structure of the triazene (2a) and the closely related bis-triazenes (3 and 5a). The piperazine ring of 2a and 4 adopt a typical chair conformation, whereas the piperazine ring of 3 adopts an unusual pseudo-boat conformation. Crystal data: 4 C18H22N6, triclinic, space group P (1) over bar, a = 6.8925(2) angstrom, b = 7.8574(3) angstrom, c = 16.8856(8) angstrom, alpha = 103.103(2)degrees, beta = 90.528(2)degrees, gamma = 101.776(2)degrees and V = 870.44 (6) angstrom(3), for Z = 2.

• 出版日期2010-10